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 #define EX_NOHIDE 0x4000 /* traversable from exported parent */
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, req) (nfsauth_access(exi, req) & NFSAUTH_RO)
537 #define rdonly4(exi, vp, req) \
538 (vn_is_readonly(vp) || \
539 (nfsauth4_access(exi, vp, req) & (NFSAUTH_RO | NFSAUTH_LIMITED)))
540
541 extern int nfsauth4_access(struct exportinfo *, vnode_t *,
542 struct svc_req *);
543 extern int nfsauth4_secinfo_access(struct exportinfo *,
544 struct svc_req *, int, int);
545 extern int nfs_fhbcmp(char *, char *, int);
546 extern int nfs_exportinit(void);
547 extern void nfs_exportfini(void);
548 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *req);
549 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *);
550 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t);
551 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *);
552 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t);
553 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *);
554 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *);
555 extern vnode_t *lm_fhtovp(fhandle_t *fh);
556 extern vnode_t *lm_nfs3_fhtovp(nfs_fh3 *fh);
557 extern struct exportinfo *checkexport(fsid_t *, struct fid *);
558 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *vp);
559 extern void exi_hold(struct exportinfo *);
560 extern void exi_rele(struct exportinfo *);
561 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *,
562 int *, bool_t);
563 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *,
564 struct exportinfo **);
565 extern void export_link(struct exportinfo *);
566 extern void export_unlink(struct exportinfo *);
567 extern vnode_t *untraverse(vnode_t *);
568 extern int vn_is_nfs_reparse(vnode_t *, cred_t *);
569 extern int client_is_downrev(struct svc_req *);
570 extern char *build_symlink(vnode_t *, cred_t *, size_t *);
571
572 /*
573 * Functions that handle the NFSv4 server namespace
574 */
575 extern exportinfo_t *vis2exi(treenode_t *);
576 extern int treeclimb_export(struct exportinfo *);
577 extern void treeclimb_unexport(struct exportinfo *);
578 extern int nfs_visible(struct exportinfo *, vnode_t *, int *);
579 extern int nfs_visible_inode(struct exportinfo *, ino64_t, int *);
580 extern int has_visible(struct exportinfo *, vnode_t *);
581 extern void free_visible(struct exp_visible *);
582 extern int nfs_exported(struct exportinfo *, vnode_t *);
583 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *,
584 struct exp_visible *, struct exportdata *);
585 extern int vop_fid_pseudo(vnode_t *, fid_t *fidp);
586 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *);
587 /*
588 * Functions that handle the NFSv4 server namespace security flavors
589 * information.
590 */
591 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *);
592 extern void srv_secinfo_list_free(struct secinfo *, int);
593
594 /*
595 * "public" and default (root) location for public filehandle
596 */
597 extern struct exportinfo *exi_public, *exi_root;
598 extern fhandle_t nullfh2; /* for comparing V2 filehandles */
599 extern krwlock_t exported_lock;
600 extern struct exportinfo *exptable[];
601
602 /*
603 * Two macros for identifying public filehandles.
604 * A v2 public filehandle is 32 zero bytes.
605 * A v3 public filehandle is zero length.
606 */
607 #define PUBLIC_FH2(fh) \
608 ((fh)->fh_fsid.val[1] == 0 && \
609 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0)
610
611 #define PUBLIC_FH3(fh) \
612 ((fh)->fh3_length == 0)
613
614 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *);
615 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *);
616
617 #endif /* _KERNEL */
618
619 #ifdef __cplusplus
620 }
621 #endif
622
623 #endif /* _NFS_EXPORT_H */