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 2016 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. 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
193 #ifdef _KERNEL
194
195 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */
196 /*
197 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit.
198 * Right now, if this bit is on, we ignore the results of per NFS request
199 * access control.
200 */
201 #define RPC_ALLOWANON 0x2 /* allow anonymous access */
202 #define RPC_MAPRESP 0x4 /* use mapped response buffer */
203 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */
204 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */
205
206 /*
207 * RPC_ALL is an or of all above bits to be used with "don't care"
208 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the
209 * per-op flags.
210 */
211 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK)
212
213
214 #ifdef VOLATILE_FH_TEST
215 struct ex_vol_rename {
216 nfs_fh4_fmt_t vrn_fh_fmt;
217 struct ex_vol_rename *vrn_next;
218 };
219 #endif /* VOLATILE_FH_TEST */
220
221 /*
222 * An auth cache client entry. This is the umbrella structure and contains all
223 * related auth_cache entries in the authc_tree AVL tree.
224 */
225 struct auth_cache_clnt {
226 avl_node_t authc_link;
227 struct netbuf authc_addr; /* address of the client */
228 krwlock_t authc_lock; /* protects authc_tree */
229 avl_tree_t authc_tree; /* auth_cache entries */
230 };
231
232 /*
233 * An auth cache entry can exist in 6 states.
234 *
235 * A NEW entry was recently allocated and added to the cache. It does not
236 * contain the valid auth state yet.
237 *
238 * A WAITING entry is one which is actively engaging the user land mountd code
239 * to authenticate or re-authenticate it. The auth state might not be valid
240 * yet. The other threads should wait on auth_cv until the retrieving thread
241 * finishes the retrieval and changes the auth cache entry to FRESH, or NEW (in
242 * a case this entry had no valid auth state yet).
243 *
244 * A REFRESHING entry is one which is actively engaging the user land mountd
245 * code to re-authenticate the cache entry. There is currently no other thread
246 * waiting for the results of the refresh.
247 *
248 * A FRESH entry is one which is valid (it is either newly retrieved or has
249 * been refreshed at least once).
250 *
251 * A STALE entry is one which has been detected to be too old. The transition
252 * from FRESH to STALE prevents multiple threads from submitting refresh
253 * requests.
254 *
255 * An INVALID entry is one which was either STALE or REFRESHING and was deleted
256 * out of the encapsulating exi. Since we can't delete it yet, we mark it as
257 * INVALID, which lets the refresh thread know not to work on it and free it
258 * instead.
259 *
260 * Note that the auth state of the entry is valid, even if the entry is STALE.
261 * Just as you can eat stale bread, you can consume a stale cache entry. The
262 * only time the contents change could be during the transition from REFRESHING
263 * or WAITING to FRESH.
264 *
265 * Valid state transitions:
266 *
267 * alloc
268 * |
269 * v
270 * +-----+
271 * +--->| NEW |------>free
272 * | +-----+
273 * | |
274 * | v
275 * | +---------+
276 * +<-| WAITING |
277 * ^ +---------+
278 * | |
279 * | v
280 * | +<--------------------------+<---------------+
281 * | | ^ |
282 * | v | |
283 * | +-------+ +-------+ +------------+ +---------+
284 * +---| FRESH |--->| STALE |--->| REFRESHING |--->| WAITING |
285 * +-------+ +-------+ +------------+ +---------+
286 * | | |
287 * | v |
288 * v +---------+ |
289 * free<-----| INVALID |<--------+
290 * +---------+
291 */
292 typedef enum auth_state {
293 NFS_AUTH_FRESH,
294 NFS_AUTH_STALE,
295 NFS_AUTH_REFRESHING,
296 NFS_AUTH_INVALID,
297 NFS_AUTH_NEW,
298 NFS_AUTH_WAITING
299 } auth_state_t;
300
301 /*
302 * An authorization cache entry
303 *
304 * Either the state in auth_state will protect the
305 * contents or auth_lock must be held.
306 */
307 struct auth_cache {
308 avl_node_t auth_link;
309 struct auth_cache_clnt *auth_clnt;
310 int auth_flavor;
311 cred_t *auth_clnt_cred;
312 uid_t auth_srv_uid;
313 gid_t auth_srv_gid;
314 uint_t auth_srv_ngids;
315 gid_t *auth_srv_gids;
316 int auth_access;
317 time_t auth_time;
318 time_t auth_freshness;
319 auth_state_t auth_state;
320 kmutex_t auth_lock;
321 kcondvar_t auth_cv;
322 };
323
324 #define AUTH_TABLESIZE 32
325
326 /*
327 * Structure containing log file meta-data.
328 */
329 struct log_file {
330 unsigned int lf_flags; /* flags (see below) */
331 int lf_writers; /* outstanding writers */
332 int lf_refcnt; /* references to this struct */
333 caddr_t lf_path; /* buffer file location */
334 vnode_t *lf_vp; /* vnode for the buffer file */
335 kmutex_t lf_lock;
336 kcondvar_t lf_cv_waiters;
337 };
338
339 /*
340 * log_file and log_buffer flags.
341 */
342 #define L_WAITING 0x01 /* flush of in-core data to stable */
343 /* storage in progress */
344 #define L_PRINTED 0x02 /* error message printed to console */
345 #define L_ERROR 0x04 /* error condition detected */
346
347 /*
348 * The logging buffer information.
349 * This structure may be shared by multiple exportinfo structures,
350 * if they share the same buffer file.
351 * This structure contains the basic information about the buffer, such
352 * as it's location in the filesystem.
353 *
354 * 'lb_lock' protects all the fields in this structure except for 'lb_path',
355 * and 'lb_next'.
356 * 'lb_path' is a write-once/read-many field which needs no locking, it is
357 * set before the structure is linked to any exportinfo structure.
358 * 'lb_next' is protected by the log_buffer_list_lock.
359 */
360 struct log_buffer {
361 unsigned int lb_flags; /* L_ONLIST set? */
362 int lb_refcnt; /* references to this struct */
363 unsigned int lb_rec_id; /* used to generate unique id */
364 caddr_t lb_path; /* buffer file pathname */
365 struct log_file *lb_logfile; /* points to log_file structure */
366 kmutex_t lb_lock;
367 struct log_buffer *lb_next;
368 kcondvar_t lb_cv_waiters;
369 caddr_t lb_records; /* linked list of records to write */
370 int lb_num_recs; /* # of records to write */
371 ssize_t lb_size_queued; /* number of bytes queued for write */
372 };
373
374 #define LOG_BUFFER_HOLD(lbp) { \
375 mutex_enter(&(lbp)->lb_lock); \
376 (lbp)->lb_refcnt++; \
377 mutex_exit(&(lbp)->lb_lock); \
378 }
379
380 #define LOG_BUFFER_RELE(lbp) { \
381 log_buffer_rele(lbp); \
382 }
383
384 /*
385 * Structure for character set conversion mapping based on client address.
386 */
387 struct charset_cache {
388 struct charset_cache *next;
389 kiconv_t inbound;
390 kiconv_t outbound;
391 struct sockaddr client_addr;
392 };
393
394 /* Forward declarations */
395 struct exportinfo;
396 struct exp_visible;
397 struct svc_req;
398
399 /*
400 * Treenodes are used to build tree representing every node which is part
401 * of nfs server pseudo namespace. They are connected with both exportinfo
402 * and exp_visible struct. They were introduced to avoid lookup of ".."
403 * in the underlying file system during unshare, which was failing if the
404 * file system was forcibly unmounted or if the directory was removed.
405 * One exp_visible_t can be shared via several treenode_t, i.e.
406 * different tree_vis can point to the same exp_visible_t.
407 * This will happen if some directory is on two different shared paths:
408 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes
409 * corresponding to /tmp/a and both will have same value in tree_vis.
410 *
411 *
412 *
413 * NEW DATA STRUCT ORIGINAL DATA STRUCT
414 *
415 * ns_root +---+ +----------+
416 * | / | |PSEUDO EXP|-->+---+ +---+ +---+
417 * +---+--------- ----+----------+ | a |-->| k |-->| b |
418 * /\ +---+ +---+ +---+
419 * / \ . . .
420 * +---+...\......... ..................... . .
421 * *| a | \ +----------+ . .
422 * +---+-----\------- ----|REAL EXP a| . .
423 * / \ +----------+ . .
424 * / +===+... ............................. .
425 * / *| k | +----------+ .
426 * / +===+--- ----|REAL EXP k| .
427 * / +----------+ .
428 * +===+................ .....................................
429 * *| b | +----------+
430 * +===+---------------- ----|REAL EXP b|-->+---+
431 * \ +----------+ | d |
432 * +===+............. ...................+---+
433 * | d | +----------+
434 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+
435 * / +----------+ | e |-->| g |
436 * +---+................. ...................+---+ +---+
437 * | e | .
438 * +---+ .
439 * \ .
440 * +---+.............. ............................
441 * *| g | +----------+
442 * +---+-------------- ----|REAL EXP g|
443 * +----------+
444 *
445 *
446 *
447 * +===+ +---+ +---+
448 * | b |..mountpoint | e |..directory/file *| a |..node is shared
449 * +===+ (VROOT) +---+ +---+
450 *
451 *
452 * Bi-directional interconnect:
453 * treenode_t::tree_exi --------- exportinfo_t::exi_tree
454 * One-way direction connection:
455 * treenode_t::tree_vis .........> exp_visible_t
456 */
457 /* Access to treenode_t is under protection of exported_lock RW_LOCK */
458 typedef struct treenode {
459 /* support for generic n-ary trees */
460 struct treenode *tree_parent;
461 struct treenode *tree_child_first;
462 struct treenode *tree_sibling; /* next sibling */
463 /* private, nfs specific part */
464 struct exportinfo *tree_exi;
465 struct exp_visible *tree_vis;
466 } treenode_t;
467
468 /*
469 * TREE_ROOT checks if the node corresponds to a filesystem root
470 * TREE_EXPORTED checks if the node is explicitly shared
471 */
472
473 #define TREE_ROOT(t) \
474 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT)
475
476 #define TREE_EXPORTED(t) \
477 ((t)->tree_exi && !PSEUDO((t)->tree_exi))
478
479 /* Root of nfs pseudo namespace */
480 extern treenode_t *ns_root;
481
482 #define EXPTABLESIZE 256
483
484 struct exp_hash {
485 struct exportinfo *prev; /* ptr to the previous exportinfo */
486 struct exportinfo *next; /* ptr to the next exportinfo */
487 struct exportinfo **bckt; /* backpointer to the hash bucket */
488 };
489
490 /*
491 * A node associated with an export entry on the
492 * list of exported filesystems.
493 *
494 * exi_count+exi_lock protects an individual exportinfo from being freed
495 * when in use.
496 *
497 * You must have the writer lock on exported_lock to add/delete an exportinfo
498 * structure to/from the list.
499 *
500 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the
501 * underlying fs devno can change on each mount. When set, the server
502 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must
503 * use exi_fsid because it is guaranteed to be persistent. This isn't
504 * in any way related to NFS4 volatile filehandles.
505 *
506 * The exi_cache_lock protects the exi_cache AVL trees.
507 */
508 struct exportinfo {
509 struct exportdata exi_export;
510 fsid_t exi_fsid;
511 struct fid exi_fid;
512 struct exp_hash fid_hash;
513 struct exp_hash path_hash;
514 struct treenode *exi_tree;
515 fhandle_t exi_fh;
516 krwlock_t exi_cache_lock;
517 kmutex_t exi_lock;
518 uint_t exi_count;
519 vnode_t *exi_vp;
520 vnode_t *exi_dvp;
521 avl_tree_t *exi_cache[AUTH_TABLESIZE];
522 struct log_buffer *exi_logbuffer;
523 struct exp_visible *exi_visible;
524 struct charset_cache *exi_charset;
525 unsigned exi_volatile_dev:1;
526 unsigned exi_moved:1;
527 #ifdef VOLATILE_FH_TEST
528 uint32_t exi_volatile_id;
529 struct ex_vol_rename *exi_vol_rename;
530 kmutex_t exi_vol_rename_lock;
531 #endif /* VOLATILE_FH_TEST */
532 };
533
534 typedef struct exportinfo exportinfo_t;
535 typedef struct exportdata exportdata_t;
536 typedef struct secinfo secinfo_t;
537
538 /*
539 * exp_visible is a visible list per filesystem. It is for filesystems
540 * that may need a limited view of its contents. A pseudo export and
541 * a real export at the mount point (VROOT) which has a subtree shared
542 * has a visible list.
543 *
544 * The exi_visible field is NULL for normal, non-pseudo filesystems
545 * which do not have any subtree exported. If the field is non-null,
546 * it points to a list of visible entries, identified by vis_fid and/or
547 * vis_ino. The presence of a "visible" list means that if this export
548 * can only have a limited view, it can only view the entries in the
549 * exp_visible list. The directories in the fid list comprise paths that
550 * lead to exported directories.
551 *
552 * The vis_count field records the number of paths in this filesystem
553 * that use this directory. The vis_exported field is non-zero if the
554 * entry is an exported directory (leaf node).
555 *
556 * exp_visible itself is not reference counted. Each exp_visible is
557 * referenced twice:
558 * 1) from treenode::tree_vis
559 * 2) linked from exportinfo::exi_visible
560 * The 'owner' of exp_visible is the exportinfo structure. exp_visible should
561 * be always freed only from exportinfo_t, never from treenode::tree_vis.
562 */
563
564 struct exp_visible {
565 vnode_t *vis_vp;
566 fid_t vis_fid;
567 u_longlong_t vis_ino;
568 int vis_count;
569 int vis_exported;
570 struct exp_visible *vis_next;
571 struct secinfo *vis_secinfo;
572 int vis_seccnt;
573 timespec_t vis_change;
574 };
575 typedef struct exp_visible exp_visible_t;
576
577 #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO)
578 #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL)
579
580 #define EQFSID(fsidp1, fsidp2) \
581 (((fsidp1)->val[0] == (fsidp2)->val[0]) && \
582 ((fsidp1)->val[1] == (fsidp2)->val[1]))
583
584 #define EQFID(fidp1, fidp2) \
585 ((fidp1)->fid_len == (fidp2)->fid_len && \
586 bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \
587 (uint_t)(fidp1)->fid_len) == 0)
588
589 #define exportmatch(exi, fsid, fid) \
590 (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid)))
591
592 /*
593 * Returns true iff exported filesystem is read-only to the given host.
594 *
595 * Note: this macro should be as fast as possible since it's called
596 * on each NFS modification request.
597 */
598 #define rdonly(ro, vp) ((ro) || vn_is_readonly(vp))
599 #define rdonly4(req, cs) \
600 (vn_is_readonly((cs)->vp) || \
601 (nfsauth4_access((cs)->exi, (cs)->vp, (req), (cs)->basecr, NULL, \
602 NULL, NULL, NULL) & (NFSAUTH_RO | NFSAUTH_LIMITED)))
603
604 extern int nfsauth4_access(struct exportinfo *, vnode_t *,
605 struct svc_req *, cred_t *, uid_t *, gid_t *, uint_t *, gid_t **);
606 extern int nfsauth4_secinfo_access(struct exportinfo *,
607 struct svc_req *, int, int, cred_t *);
608 extern int nfsauth_cache_clnt_compar(const void *, const void *);
609 extern int nfs_fhbcmp(char *, char *, int);
610 extern int nfs_exportinit(void);
611 extern void nfs_exportfini(void);
612 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *);
613 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *);
614 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t);
615 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *);
616 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t);
617 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *);
618 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *);
619 extern struct exportinfo *checkexport(fsid_t *, struct fid *);
620 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *);
621 extern void exi_hold(struct exportinfo *);
622 extern void exi_rele(struct exportinfo *);
623 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *,
624 int *, bool_t);
625 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *,
626 struct exportinfo **);
627 extern void export_link(struct exportinfo *);
628 extern void export_unlink(struct exportinfo *);
629 extern vnode_t *untraverse(vnode_t *);
630 extern int vn_is_nfs_reparse(vnode_t *, cred_t *);
631 extern int client_is_downrev(struct svc_req *);
632 extern char *build_symlink(vnode_t *, cred_t *, size_t *);
633
634 /*
635 * Functions that handle the NFSv4 server namespace
636 */
637 extern exportinfo_t *vis2exi(treenode_t *);
638 extern int treeclimb_export(struct exportinfo *);
639 extern void treeclimb_unexport(struct exportinfo *);
640 extern int nfs_visible(struct exportinfo *, vnode_t *, int *);
641 extern int nfs_visible_inode(struct exportinfo *, ino64_t,
642 struct exp_visible **);
643 extern int has_visible(struct exportinfo *, vnode_t *);
644 extern void free_visible(struct exp_visible *);
645 extern int nfs_exported(struct exportinfo *, vnode_t *);
646 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *,
647 struct exp_visible *, struct exportdata *);
648 extern int vop_fid_pseudo(vnode_t *, fid_t *);
649 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *);
650 extern bool_t nfs_visible_change(struct exportinfo *, vnode_t *,
651 timespec_t *);
652 extern void tree_update_change(treenode_t *, timespec_t *);
653 /*
654 * Functions that handle the NFSv4 server namespace security flavors
655 * information.
656 */
657 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *);
658 extern void srv_secinfo_list_free(struct secinfo *, int);
659
660 /*
661 * "public" and default (root) location for public filehandle
662 */
663 extern struct exportinfo *exi_public, *exi_root;
664 extern fhandle_t nullfh2; /* for comparing V2 filehandles */
665 extern krwlock_t exported_lock;
666 extern struct exportinfo *exptable[];
667
668 /*
669 * Two macros for identifying public filehandles.
670 * A v2 public filehandle is 32 zero bytes.
671 * A v3 public filehandle is zero length.
672 */
673 #define PUBLIC_FH2(fh) \
674 ((fh)->fh_fsid.val[1] == 0 && \
675 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0)
676
677 #define PUBLIC_FH3(fh) \
678 ((fh)->fh3_length == 0)
679
680 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *);
681 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *);
682
683 #endif /* _KERNEL */
684
685 #ifdef __cplusplus
686 }
687 #endif
688
689 #endif /* _NFS_EXPORT_H */