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 */ 113 114 /* invalid secinfo reference count */ 115 #define SEC_REF_INVALID(p) ((p)->s_refcnt < 1) 116 117 /* last secinfo reference */ 118 #define SEC_REF_LAST(p) ((p)->s_refcnt == 1) 119 120 /* sec flavor explicitly shared for the exported node */ 121 #define SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED) 122 123 /* the only reference count left is for referring itself */ 124 #define SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p)) 125 126 /* 127 * The export information passed to exportfs() (Version 2) 128 */ 129 #define EX_CURRENT_VERSION 2 /* current version of exportdata struct */ 130 131 struct exportdata { 132 int ex_version; /* structure version */ 133 char *ex_path; /* exported path */ 134 size_t ex_pathlen; /* path length */ 135 int ex_flags; /* flags */ 136 unsigned int ex_anon; /* uid for unauthenticated requests */ 137 int ex_seccnt; /* count of security modes */ 138 struct secinfo *ex_secinfo; /* security mode info */ 139 char *ex_index; /* index file for public filesystem */ 140 char *ex_log_buffer; /* path to logging buffer file */ 141 size_t ex_log_bufferlen; /* buffer file path len */ 142 char *ex_tag; /* tag used to identify log config */ 143 size_t ex_taglen; /* tag length */ 144 }; 145 146 #ifdef _SYSCALL32 147 struct exportdata32 { 148 int32_t ex_version; /* structure version */ 149 caddr32_t ex_path; /* exported path */ 150 int32_t ex_pathlen; /* path length */ 151 int32_t ex_flags; /* flags */ 152 uint32_t ex_anon; /* uid for unauthenticated requests */ 153 int32_t ex_seccnt; /* count of security modes */ 154 caddr32_t ex_secinfo; /* security mode info */ 155 caddr32_t ex_index; /* index file for public filesystem */ 156 caddr32_t ex_log_buffer; /* path to logging buffer file */ 157 int32_t ex_log_bufferlen; /* buffer file path len */ 158 caddr32_t ex_tag; /* tag used to identify log config */ 159 int32_t ex_taglen; /* tag length */ 160 }; 161 #endif /* _SYSCALL32 */ 162 163 /* 164 * exported vfs flags. 165 */ 166 167 #define EX_NOSUID 0x01 /* exported with unsetable set[ug]ids */ 168 #define EX_ACLOK 0x02 /* exported with maximal access if acl exists */ 169 #define EX_PUBLIC 0x04 /* exported with public filehandle */ 170 #define EX_NOSUB 0x08 /* no nfs_getfh or MCL below export point */ 171 #define EX_INDEX 0x10 /* exported with index file specified */ 172 #define EX_LOG 0x20 /* logging enabled */ 173 #define EX_LOG_ALLOPS 0x40 /* logging of all RPC operations enabled */ 174 /* by default only operations which affect */ 175 /* transaction logging are enabled */ 176 #define EX_PSEUDO 0x80 /* pseudo filesystem export */ 177 #ifdef VOLATILE_FH_TEST 178 #define EX_VOLFH 0x100 /* XXX nfsv4 fh may expire anytime */ 179 #define EX_VOLRNM 0x200 /* XXX nfsv4 fh expire at rename */ 180 #define EX_VOLMIG 0x400 /* XXX nfsv4 fh expire at migration */ 181 #define EX_NOEXPOPEN 0x800 /* XXX nfsv4 fh no expire with open */ 182 #endif /* VOLATILE_FH_TEST */ 183 184 #define EX_CHARMAP 0x1000 /* NFS may need a character set conversion */ 185 #define EX_NOACLFAB 0x2000 /* If set, NFSv2 and v3 servers doesn't */ 186 /* fabricate ACL for VOP_GETSECATTR OTW call */ 187 188 #ifdef _KERNEL 189 190 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */ 191 /* 192 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit. 193 * Right now, it this bit is on, we ignore the results of per NFS request 194 * access control. 195 */ 196 #define RPC_ALLOWANON 0x2 /* allow anonymous access */ 197 #define RPC_MAPRESP 0x4 /* use mapped response buffer */ 198 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */ 199 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */ 200 201 /* 202 * RPC_ALL is an or of all above bits to be used with "don't care" 203 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the 204 * per-op flags. 205 */ 206 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK) 207 208 209 #ifdef VOLATILE_FH_TEST 210 struct ex_vol_rename { 211 nfs_fh4_fmt_t vrn_fh_fmt; 212 struct ex_vol_rename *vrn_next; 213 }; 214 #endif /* VOLATILE_FH_TEST */ 215 216 /* 217 * An auth cache entry can exist in 4 active states, with the inactive 218 * state being indicated by no entry in the cache. 219 * 220 * A FRESH entry is one which is either new or has been refreshed at 221 * least once. 222 * 223 * A STALE entry is one which has been detected to be too old. The 224 * transistion from FRESH to STALE prevents multiple threads from 225 * submitting refresh requests. 226 * 227 * A REFRESHING entry is one which is actively engaging the user land 228 * mountd code to re-authenticate the cache entry. 229 * 230 * An INVALID entry was one which was either STALE or REFRESHING 231 * and was deleted out of the encapsulating exi. Since we can't 232 * delete it yet, we mark it as INVALID, which lets the refreshq 233 * know not to work on it. 234 * 235 * Note that the auth state of the entry is always valid, even if the 236 * entry is STALE. Just as you can eat stale bread, you can consume 237 * a stale cache entry. The only time the contents change could be 238 * during the transistion from REFRESHING to FRESH. 239 */ 240 typedef enum auth_state { 241 NFS_AUTH_FRESH, 242 NFS_AUTH_STALE, 243 NFS_AUTH_REFRESHING, 244 NFS_AUTH_INVALID 245 } auth_state_t; 246 247 /* 248 * An authorization cache entry 249 * 250 * Either the state in auth_state will protect the 251 * contents or auth_lock must be held. 252 */ 253 struct auth_cache { 254 struct netbuf auth_addr; 255 int auth_flavor; 256 int auth_access; 257 time_t auth_time; 258 time_t auth_freshness; 259 auth_state_t auth_state; 260 char *auth_netid; 261 kmutex_t auth_lock; 262 struct auth_cache *auth_next; 263 }; 264 265 #define AUTH_TABLESIZE 32 266 267 /* 268 * Structure containing log file meta-data. 269 */ 270 struct log_file { 271 unsigned int lf_flags; /* flags (see below) */ 272 int lf_writers; /* outstanding writers */ 273 int lf_refcnt; /* references to this struct */ 274 caddr_t lf_path; /* buffer file location */ 275 vnode_t *lf_vp; /* vnode for the buffer file */ 276 kmutex_t lf_lock; 277 kcondvar_t lf_cv_waiters; 278 }; 279 280 /* 281 * log_file and log_buffer flags. 282 */ 283 #define L_WAITING 0x01 /* flush of in-core data to stable */ 284 /* storage in progress */ 285 #define L_PRINTED 0x02 /* error message printed to console */ 286 #define L_ERROR 0x04 /* error condition detected */ 287 288 /* 289 * The logging buffer information. 290 * This structure may be shared by multiple exportinfo structures, 291 * if they share the same buffer file. 292 * This structure contains the basic information about the buffer, such 293 * as it's location in the filesystem. 294 * 295 * 'lb_lock' protects all the fields in this structure except for 'lb_path', 296 * and 'lb_next'. 297 * 'lb_path' is a write-once/read-many field which needs no locking, it is 298 * set before the structure is linked to any exportinfo structure. 299 * 'lb_next' is protected by the log_buffer_list_lock. 300 */ 301 struct log_buffer { 302 unsigned int lb_flags; /* L_ONLIST set? */ 303 int lb_refcnt; /* references to this struct */ 304 unsigned int lb_rec_id; /* used to generate unique id */ 305 caddr_t lb_path; /* buffer file pathname */ 306 struct log_file *lb_logfile; /* points to log_file structure */ 307 kmutex_t lb_lock; 308 struct log_buffer *lb_next; 309 kcondvar_t lb_cv_waiters; 310 caddr_t lb_records; /* linked list of records to write */ 311 int lb_num_recs; /* # of records to write */ 312 ssize_t lb_size_queued; /* number of bytes queued for write */ 313 }; 314 315 #define LOG_BUFFER_HOLD(lbp) { \ 316 mutex_enter(&(lbp)->lb_lock); \ 317 (lbp)->lb_refcnt++; \ 318 mutex_exit(&(lbp)->lb_lock); \ 319 } 320 321 #define LOG_BUFFER_RELE(lbp) { \ 322 log_buffer_rele(lbp); \ 323 } 324 325 /* 326 * Structure for character set conversion mapping based on client address. 327 */ 328 struct charset_cache { 329 struct charset_cache *next; 330 kiconv_t inbound; 331 kiconv_t outbound; 332 struct sockaddr client_addr; 333 }; 334 335 /* Forward declarations */ 336 struct exportinfo; 337 struct exp_visible; 338 struct svc_req; 339 340 /* 341 * Treenodes are used to build tree representing every node which is part 342 * of nfs server pseudo namespace. They are connected with both exportinfo 343 * and exp_visible struct. They were introduced to avoid lookup of ".." 344 * in the underlying file system during unshare, which was failing if the 345 * file system was forcibly unmounted or if the directory was removed. 346 * One exp_visible_t can be shared via several treenode_t, i.e. 347 * different tree_vis can point to the same exp_visible_t. 348 * This will happen if some directory is on two different shared paths: 349 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes 350 * corresponding to /tmp/a and both will have same value in tree_vis. 351 * 352 * 353 * 354 * NEW DATA STRUCT ORIGINAL DATA STRUCT 355 * 356 * ns_root +---+ +----------+ 357 * | / | |PSEUDO EXP|-->+---+ +---+ +---+ 358 * +---+--------- ----+----------+ | a |-->| k |-->| b | 359 * /\ +---+ +---+ +---+ 360 * / \ . . . 361 * +---+...\......... ..................... . . 362 * *| a | \ +----------+ . . 363 * +---+-----\------- ----|REAL EXP a| . . 364 * / \ +----------+ . . 365 * / +===+... ............................. . 366 * / *| k | +----------+ . 367 * / +===+--- ----|REAL EXP k| . 368 * / +----------+ . 369 * +===+................ ..................................... 370 * *| b | +----------+ 371 * +===+---------------- ----|REAL EXP b|-->+---+ 372 * \ +----------+ | d | 373 * +===+............. ...................+---+ 374 * | d | +----------+ 375 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+ 376 * / +----------+ | e |-->| g | 377 * +---+................. ...................+---+ +---+ 378 * | e | . 379 * +---+ . 380 * \ . 381 * +---+.............. ............................ 382 * *| g | +----------+ 383 * +---+-------------- ----|REAL EXP g| 384 * +----------+ 385 * 386 * 387 * 388 * +===+ +---+ +---+ 389 * | b |..mountpoint | e |..directory/file *| a |..node is shared 390 * +===+ (VROOT) +---+ +---+ 391 * 392 * 393 * Bi-directional interconnect: 394 * treenode_t::tree_exi --------- exportinfo_t::exi_tree 395 * One-way direction connection: 396 * treenode_t::tree_vis .........> exp_visible_t 397 */ 398 /* Access to treenode_t is under protection of exported_lock RW_LOCK */ 399 typedef struct treenode { 400 /* support for generic n-ary trees */ 401 struct treenode *tree_parent; 402 struct treenode *tree_child_first; 403 struct treenode *tree_sibling; /* next sibling */ 404 /* private, nfs specific part */ 405 struct exportinfo *tree_exi; 406 struct exp_visible *tree_vis; 407 } treenode_t; 408 409 /* 410 * TREE_ROOT checks if the node corresponds to a filesystem root 411 * TREE_EXPORTED checks if the node is explicitly shared 412 */ 413 414 #define TREE_ROOT(t) \ 415 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT) 416 417 #define TREE_EXPORTED(t) \ 418 ((t)->tree_exi && !PSEUDO((t)->tree_exi)) 419 420 /* Root of nfs pseudo namespace */ 421 extern treenode_t *ns_root; 422 423 #define EXPTABLESIZE 256 424 425 struct exp_hash { 426 struct exportinfo *prev; /* ptr to the previous exportinfo */ 427 struct exportinfo *next; /* ptr to the next exportinfo */ 428 struct exportinfo **bckt; /* backpointer to the hash bucket */ 429 }; 430 431 /* 432 * A node associated with an export entry on the 433 * list of exported filesystems. 434 * 435 * exi_count+exi_lock protects an individual exportinfo from being freed 436 * when in use. 437 * 438 * You must have the writer lock on exported_lock to add/delete an exportinfo 439 * structure to/from the list. 440 * 441 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the 442 * underlying fs devno can change on each mount. When set, the server 443 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must 444 * use exi_fsid because it is guaranteed to be persistent. This isn't 445 * in any way related to NFS4 volatile filehandles. 446 */ 447 struct exportinfo { 448 struct exportdata exi_export; 449 fsid_t exi_fsid; 450 struct fid exi_fid; 451 struct exp_hash fid_hash; 452 struct exp_hash path_hash; 453 struct treenode *exi_tree; 454 fhandle_t exi_fh; 455 krwlock_t exi_cache_lock; 456 kmutex_t exi_lock; 457 uint_t exi_count; 458 vnode_t *exi_vp; 459 vnode_t *exi_dvp; 460 struct auth_cache *exi_cache[AUTH_TABLESIZE]; 461 struct log_buffer *exi_logbuffer; 462 struct exp_visible *exi_visible; 463 struct charset_cache *exi_charset; 464 unsigned exi_volatile_dev:1; 465 unsigned exi_moved:1; 466 #ifdef VOLATILE_FH_TEST 467 uint32_t exi_volatile_id; 468 struct ex_vol_rename *exi_vol_rename; 469 kmutex_t exi_vol_rename_lock; 470 #endif /* VOLATILE_FH_TEST */ 471 }; 472 473 typedef struct exportinfo exportinfo_t; 474 typedef struct exportdata exportdata_t; 475 typedef struct secinfo secinfo_t; 476 477 /* 478 * exp_visible is a visible list per filesystem. It is for filesystems 479 * that may need a limited view of its contents. A pseudo export and 480 * a real export at the mount point (VROOT) which has a subtree shared 481 * has a visible list. 482 * 483 * The exi_visible field is NULL for normal, non=pseudo filesystems 484 * which do not have any subtree exported. If the field is non-null, 485 * it points to a list of visible entries, identified by vis_fid and/or 486 * vis_ino. The presence of a "visible" list means that if this export 487 * can only have a limited view, it can only view the entries in the 488 * exp_visible list. The directories in the fid list comprise paths that 489 * lead to exported directories. 490 * 491 * The vis_count field records the number of paths in this filesystem 492 * that use this directory. The vis_exported field is non-zero if the 493 * entry is an exported directory (leaf node). 494 * 495 * exp_visible itself is not reference counted. Each exp_visible is 496 * referenced twice: 497 * 1) from treenode::tree_vis 498 * 2) linked from exportinfo::exi_visible 499 * The 'owner' of exp_visible is the exportinfo structure. exp_visible should 500 * be always freed only from exportinfo_t, never from treenode::tree_vis. 501 */ 502 503 struct exp_visible { 504 vnode_t *vis_vp; 505 fid_t vis_fid; 506 u_longlong_t vis_ino; 507 int vis_count; 508 int vis_exported; 509 struct exp_visible *vis_next; 510 struct secinfo *vis_secinfo; 511 int vis_seccnt; 512 }; 513 typedef struct exp_visible exp_visible_t; 514 515 #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO) 516 #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL) 517 518 #define EQFSID(fsidp1, fsidp2) \ 519 (((fsidp1)->val[0] == (fsidp2)->val[0]) && \ 520 ((fsidp1)->val[1] == (fsidp2)->val[1])) 521 522 #define EQFID(fidp1, fidp2) \ 523 ((fidp1)->fid_len == (fidp2)->fid_len && \ 524 bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \ 525 (uint_t)(fidp1)->fid_len) == 0) 526 527 #define exportmatch(exi, fsid, fid) \ 528 (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid))) 529 530 /* 531 * Returns true iff exported filesystem is read-only to the given host. 532 * 533 * Note: this macro should be as fast as possible since it's called 534 * on each NFS modification request. 535 */ 536 #define rdonly(exi, vp, req) \ 537 (vn_is_readonly(vp) || \ 538 (nfsauth_access(exi, req) & NFSAUTH_RO)) 539 #define rdonly4(exi, vp, req) \ 540 (vn_is_readonly(vp) || \ 541 (nfsauth4_access(exi, vp, req) & (NFSAUTH_RO | NFSAUTH_LIMITED))) 542 543 extern int nfsauth4_access(struct exportinfo *, vnode_t *, 544 struct svc_req *); 545 extern int nfsauth4_secinfo_access(struct exportinfo *, 546 struct svc_req *, int, int); 547 extern int nfs_fhbcmp(char *, char *, int); 548 extern int nfs_exportinit(void); 549 extern void nfs_exportfini(void); 550 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *req); 551 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *); 552 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t); 553 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *); 554 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t); 555 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *); 556 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *); 557 extern vnode_t *lm_fhtovp(fhandle_t *fh); 558 extern vnode_t *lm_nfs3_fhtovp(nfs_fh3 *fh); 559 extern struct exportinfo *checkexport(fsid_t *, struct fid *); 560 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *vp); 561 extern void exi_hold(struct exportinfo *); 562 extern void exi_rele(struct exportinfo *); 563 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *, 564 int *, bool_t); 565 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *, 566 struct exportinfo **); 567 extern void export_link(struct exportinfo *); 568 extern void export_unlink(struct exportinfo *); 569 extern vnode_t *untraverse(vnode_t *); 570 extern int vn_is_nfs_reparse(vnode_t *, cred_t *); 571 extern int client_is_downrev(struct svc_req *); 572 extern char *build_symlink(vnode_t *, cred_t *, size_t *); 573 574 /* 575 * Functions that handle the NFSv4 server namespace 576 */ 577 extern exportinfo_t *vis2exi(treenode_t *); 578 extern int treeclimb_export(struct exportinfo *); 579 extern void treeclimb_unexport(struct exportinfo *); 580 extern int nfs_visible(struct exportinfo *, vnode_t *, int *); 581 extern int nfs_visible_inode(struct exportinfo *, ino64_t, int *); 582 extern int has_visible(struct exportinfo *, vnode_t *); 583 extern void free_visible(struct exp_visible *); 584 extern int nfs_exported(struct exportinfo *, vnode_t *); 585 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *, 586 struct exp_visible *, struct exportdata *); 587 extern int vop_fid_pseudo(vnode_t *, fid_t *fidp); 588 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *); 589 /* 590 * Functions that handle the NFSv4 server namespace security flavors 591 * information. 592 */ 593 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *); 594 extern void srv_secinfo_list_free(struct secinfo *, int); 595 596 /* 597 * "public" and default (root) location for public filehandle 598 */ 599 extern struct exportinfo *exi_public, *exi_root; 600 extern fhandle_t nullfh2; /* for comparing V2 filehandles */ 601 extern krwlock_t exported_lock; 602 extern struct exportinfo *exptable[]; 603 604 /* 605 * Two macros for identifying public filehandles. 606 * A v2 public filehandle is 32 zero bytes. 607 * A v3 public filehandle is zero length. 608 */ 609 #define PUBLIC_FH2(fh) \ 610 ((fh)->fh_fsid.val[1] == 0 && \ 611 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0) 612 613 #define PUBLIC_FH3(fh) \ 614 ((fh)->fh3_length == 0) 615 616 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *); 617 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *); 618 619 #endif /* _KERNEL */ 620 621 #ifdef __cplusplus 622 } 623 #endif 624 625 #endif /* _NFS_EXPORT_H */ 626