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 */