1 /*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: releng/8.0/sys/fs/nfsserver/nfs_nfsdport.c 195699 2009-07-14 22:48:30Z rwatson $");
36
37 /*
38 * Functions that perform the vfs operations required by the routines in
39 * nfsd_serv.c. It is hoped that this change will make the server more
40 * portable.
41 */
42
43 #include <fs/nfs/nfsport.h>
44 #include <sys/sysctl.h>
45 #include <nlm/nlm_prot.h>
46 #include <nlm/nlm.h>
47
48 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
49 extern int nfsv4root_set;
50 extern int nfsrv_useacl;
51 extern int newnfs_numnfsd;
52 extern struct mount nfsv4root_mnt;
53 extern struct nfsrv_stablefirst nfsrv_stablefirst;
54 extern void (*nfsd_call_servertimer)(void);
55 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt;
56 NFSDLOCKMUTEX;
57 struct mtx nfs_cache_mutex;
58 struct mtx nfs_v4root_mutex;
59 struct nfsrvfh nfs_rootfh, nfs_pubfh;
60 int nfs_pubfhset = 0, nfs_rootfhset = 0;
61 static uint32_t nfsv4_sysid = 0;
62
63 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *,
64 struct ucred *);
65
66 static int enable_crossmntpt = 1;
67 static int nfs_commit_blks;
68 static int nfs_commit_miss;
69 extern int nfsrv_issuedelegs;
70 extern int nfsrv_dolocallocks;
71
72 SYSCTL_DECL(_vfs_newnfs);
73 SYSCTL_INT(_vfs_newnfs, OID_AUTO, mirrormnt, CTLFLAG_RW, &enable_crossmntpt,
74 0, "Enable nfsd to cross mount points");
75 SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks,
76 0, "");
77 SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss,
78 0, "");
79 SYSCTL_INT(_vfs_newnfs, OID_AUTO, issue_delegations, CTLFLAG_RW,
80 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations");
81 SYSCTL_INT(_vfs_newnfs, OID_AUTO, enable_locallocks, CTLFLAG_RW,
82 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files");
83
84 #define NUM_HEURISTIC 1017
85 #define NHUSE_INIT 64
86 #define NHUSE_INC 16
87 #define NHUSE_MAX 2048
88
89 static struct nfsheur {
90 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */
91 off_t nh_nextr; /* next offset for sequential detection */
92 int nh_use; /* use count for selection */
93 int nh_seqcount; /* heuristic */
94 } nfsheur[NUM_HEURISTIC];
95
96
97 /*
98 * Get attributes into nfsvattr structure.
99 */
100 int
101 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
102 struct thread *p)
103 {
104 int error, lockedit = 0;
105
106 /* Since FreeBSD insists the vnode be locked... */
107 if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
108 lockedit = 1;
109 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p);
110 }
111 error = VOP_GETATTR(vp, &nvap->na_vattr, cred);
112 if (lockedit)
113 NFSVOPUNLOCK(vp, 0, p);
114 return (error);
115 }
116
117 /*
118 * Get a file handle for a vnode.
119 */
120 int
121 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p)
122 {
123 int error;
124
125 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t));
126 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
127 error = VOP_VPTOFH(vp, &fhp->fh_fid);
128 return (error);
129 }
130
131 /*
132 * Perform access checking for vnodes obtained from file handles that would
133 * refer to files already opened by a Unix client. You cannot just use
134 * vn_writechk() and VOP_ACCESS() for two reasons.
135 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case
136 * 2 - The owner is to be given access irrespective of mode bits for some
137 * operations, so that processes that chmod after opening a file don't
138 * break.
139 */
140 int
141 nfsvno_accchk(struct vnode *vp, u_int32_t accessbits, struct ucred *cred,
142 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked)
143 {
144 struct vattr vattr;
145 int error = 0, getret = 0;
146 accmode_t accmode;
147
148 /*
149 * Convert accessbits to Vxxx flags.
150 */
151 if (accessbits & (NFSV4ACE_WRITEDATA | NFSV4ACE_APPENDDATA |
152 NFSV4ACE_ADDFILE | NFSV4ACE_ADDSUBDIRECTORY |
153 NFSV4ACE_DELETECHILD | NFSV4ACE_WRITEATTRIBUTES |
154 NFSV4ACE_DELETE | NFSV4ACE_WRITEACL | NFSV4ACE_WRITEOWNER))
155 accmode = VWRITE;
156 else if (accessbits & (NFSV4ACE_EXECUTE | NFSV4ACE_SEARCH))
157 accmode = VEXEC;
158 else
159 accmode = VREAD;
160
161 if (accmode & VWRITE) {
162 /* Just vn_writechk() changed to check rdonly */
163 /*
164 * Disallow write attempts on read-only file systems;
165 * unless the file is a socket or a block or character
166 * device resident on the file system.
167 */
168 if (NFSVNO_EXRDONLY(exp) ||
169 (vp->v_mount->mnt_flag & MNT_RDONLY)) {
170 switch (vp->v_type) {
171 case VREG:
172 case VDIR:
173 case VLNK:
174 return (EROFS);
175 default:
176 break;
177 }
178 }
179 /*
180 * If there's shared text associated with
181 * the inode, try to free it up once. If
182 * we fail, we can't allow writing.
183 */
184 if (vp->v_vflag & VV_TEXT)
185 return (ETXTBSY);
186 }
187 if (vpislocked == 0)
188 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p);
189
190 #if defined(NFS4_ACL_EXTATTR_NAME) && defined(notyet)
191 /*
192 * This function should be called once FFS has NFSv4 ACL support
193 * in it.
194 */
195 /*
196 * Should the override still be applied when ACLs are enabled?
197 */
198 if (nfsrv_useacl != 0 && NFSHASNFS4ACL(vp->v_mount))
199 error = nfsrv_aclaccess(vp, accmode, accessbits, cred, p);
200 else
201 #endif
202 if (accessbits == NFSV4ACE_READATTRIBUTES)
203 error = 0;
204 else
205 error = VOP_ACCESS(vp, accmode, cred, p);
206
207 /*
208 * Allow certain operations for the owner (reads and writes
209 * on files that are already open).
210 */
211 if (override != NFSACCCHK_NOOVERRIDE &&
212 (error == EPERM || error == EACCES)) {
213 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT))
214 error = 0;
215 else if (override & NFSACCCHK_ALLOWOWNER) {
216 getret = VOP_GETATTR(vp, &vattr, cred);
217 if (getret == 0 && cred->cr_uid == vattr.va_uid)
218 error = 0;
219 }
220 }
221 if (vpislocked == 0)
222 NFSVOPUNLOCK(vp, 0, p);
223 return (error);
224 }
225
226 /*
227 * Set attribute(s) vnop.
228 */
229 int
230 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
231 struct thread *p, struct nfsexstuff *exp)
232 {
233 int error;
234
235 error = VOP_SETATTR(vp, &nvap->na_vattr, cred);
236 return (error);
237 }
238
239 /*
240 * Set up nameidata for a lookup() call and do it
241 * For the cases where we are crossing mount points
242 * (looking up the public fh path or the v4 root path when
243 * not using a pseudo-root fs), set/release the Giant lock,
244 * as required.
245 */
246 int
247 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp,
248 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p,
249 struct vnode **retdirp)
250 {
251 struct componentname *cnp = &ndp->ni_cnd;
252 int i;
253 struct iovec aiov;
254 struct uio auio;
255 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen;
256 int error = 0, crossmnt;
257 char *cp;
258
259 *retdirp = NULL;
260 cnp->cn_nameptr = cnp->cn_pnbuf;
261 /*
262 * Extract and set starting directory.
263 */
264 if (dp->v_type != VDIR) {
265 if (islocked)
266 vput(dp);
267 else
268 vrele(dp);
269 nfsvno_relpathbuf(ndp);
270 return (ENOTDIR);
271 }
272 if (islocked)
273 NFSVOPUNLOCK(dp, 0, p);
274 VREF(dp);
275 *retdirp = dp;
276 if (NFSVNO_EXRDONLY(exp))
277 cnp->cn_flags |= RDONLY;
278 ndp->ni_segflg = UIO_SYSSPACE;
279 crossmnt = 1;
280
281 if (nd->nd_flag & ND_PUBLOOKUP) {
282 ndp->ni_loopcnt = 0;
283 if (cnp->cn_pnbuf[0] == '/') {
284 vrele(dp);
285 /*
286 * Check for degenerate pathnames here, since lookup()
287 * panics on them.
288 */
289 for (i = 1; i < ndp->ni_pathlen; i++)
290 if (cnp->cn_pnbuf[i] != '/')
291 break;
292 if (i == ndp->ni_pathlen) {
293 error = NFSERR_ACCES;
294 goto out;
295 }
296 dp = rootvnode;
297 VREF(dp);
298 }
299 } else if ((enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) ||
300 (nd->nd_flag & ND_NFSV4) == 0) {
301 /*
302 * Only cross mount points for NFSv4 when doing a
303 * mount while traversing the file system above
304 * the mount point, unless enable_crossmntpt is set.
305 */
306 cnp->cn_flags |= NOCROSSMOUNT;
307 crossmnt = 0;
308 }
309
310 /*
311 * Initialize for scan, set ni_startdir and bump ref on dp again
312 * becuase lookup() will dereference ni_startdir.
313 */
314
315 cnp->cn_thread = p;
316 ndp->ni_startdir = dp;
317 ndp->ni_rootdir = rootvnode;
318
319 if (!lockleaf)
320 cnp->cn_flags |= LOCKLEAF;
321 for (;;) {
322 cnp->cn_nameptr = cnp->cn_pnbuf;
323 /*
324 * Call lookup() to do the real work. If an error occurs,
325 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and
326 * we do not have to dereference anything before returning.
327 * In either case ni_startdir will be dereferenced and NULLed
328 * out.
329 */
330 if (exp->nes_vfslocked)
331 ndp->ni_cnd.cn_flags |= GIANTHELD;
332 error = lookup(ndp);
333 /*
334 * The Giant lock should only change when
335 * crossing mount points.
336 */
337 if (crossmnt) {
338 exp->nes_vfslocked =
339 (ndp->ni_cnd.cn_flags & GIANTHELD) != 0;
340 ndp->ni_cnd.cn_flags &= ~GIANTHELD;
341 }
342 if (error)
343 break;
344
345 /*
346 * Check for encountering a symbolic link. Trivial
347 * termination occurs if no symlink encountered.
348 */
349 if ((cnp->cn_flags & ISSYMLINK) == 0) {
350 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0)
351 nfsvno_relpathbuf(ndp);
352 if (ndp->ni_vp && !lockleaf)
353 NFSVOPUNLOCK(ndp->ni_vp, 0, p);
354 break;
355 }
356
357 /*
358 * Validate symlink
359 */
360 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
361 NFSVOPUNLOCK(ndp->ni_dvp, 0, p);
362 if (!(nd->nd_flag & ND_PUBLOOKUP)) {
363 error = EINVAL;
364 goto badlink2;
365 }
366
367 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
368 error = ELOOP;
369 goto badlink2;
370 }
371 if (ndp->ni_pathlen > 1)
372 cp = uma_zalloc(namei_zone, M_WAITOK);
373 else
374 cp = cnp->cn_pnbuf;
375 aiov.iov_base = cp;
376 aiov.iov_len = MAXPATHLEN;
377 auio.uio_iov = &aiov;
378 auio.uio_iovcnt = 1;
379 auio.uio_offset = 0;
380 auio.uio_rw = UIO_READ;
381 auio.uio_segflg = UIO_SYSSPACE;
382 auio.uio_td = NULL;
383 auio.uio_resid = MAXPATHLEN;
384 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
385 if (error) {
386 badlink1:
387 if (ndp->ni_pathlen > 1)
388 uma_zfree(namei_zone, cp);
389 badlink2:
390 vrele(ndp->ni_dvp);
391 vput(ndp->ni_vp);
392 break;
393 }
394 linklen = MAXPATHLEN - auio.uio_resid;
395 if (linklen == 0) {
396 error = ENOENT;
397 goto badlink1;
398 }
399 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
400 error = ENAMETOOLONG;
401 goto badlink1;
402 }
403
404 /*
405 * Adjust or replace path
406 */
407 if (ndp->ni_pathlen > 1) {
408 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
409 uma_zfree(namei_zone, cnp->cn_pnbuf);
410 cnp->cn_pnbuf = cp;
411 } else
412 cnp->cn_pnbuf[linklen] = '\0';
413 ndp->ni_pathlen += linklen;
414
415 /*
416 * Cleanup refs for next loop and check if root directory
417 * should replace current directory. Normally ni_dvp
418 * becomes the new base directory and is cleaned up when
419 * we loop. Explicitly null pointers after invalidation
420 * to clarify operation.
421 */
422 vput(ndp->ni_vp);
423 ndp->ni_vp = NULL;
424
425 if (cnp->cn_pnbuf[0] == '/') {
426 vrele(ndp->ni_dvp);
427 ndp->ni_dvp = ndp->ni_rootdir;
428 VREF(ndp->ni_dvp);
429 }
430 ndp->ni_startdir = ndp->ni_dvp;
431 ndp->ni_dvp = NULL;
432 }
433 if (!lockleaf)
434 cnp->cn_flags &= ~LOCKLEAF;
435
436 out:
437 if (error) {
438 uma_zfree(namei_zone, cnp->cn_pnbuf);
439 ndp->ni_vp = NULL;
440 ndp->ni_dvp = NULL;
441 ndp->ni_startdir = NULL;
442 cnp->cn_flags &= ~HASBUF;
443 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) {
444 ndp->ni_dvp = NULL;
445 }
446 return (error);
447 }
448
449 /*
450 * Set up a pathname buffer and return a pointer to it and, optionally
451 * set a hash pointer.
452 */
453 void
454 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp)
455 {
456 struct componentname *cnp = &ndp->ni_cnd;
457
458 cnp->cn_flags |= (NOMACCHECK | HASBUF);
459 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK);
460 if (hashpp != NULL)
461 *hashpp = NULL;
462 *bufpp = cnp->cn_pnbuf;
463 }
464
465 /*
466 * Release the above path buffer, if not released by nfsvno_namei().
467 */
468 void
469 nfsvno_relpathbuf(struct nameidata *ndp)
470 {
471
472 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0)
473 panic("nfsrelpath");
474 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf);
475 ndp->ni_cnd.cn_flags &= ~HASBUF;
476 }
477
478 /*
479 * Readlink vnode op into an mbuf list.
480 */
481 int
482 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p,
483 struct mbuf **mpp, struct mbuf **mpendp, int *lenp)
484 {
485 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
486 struct iovec *ivp = iv;
487 struct uio io, *uiop = &io;
488 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL;
489 int i, len, tlen, error;
490
491 len = 0;
492 i = 0;
493 while (len < NFS_MAXPATHLEN) {
494 NFSMGET(mp);
495 MCLGET(mp, M_WAIT);
496 mp->m_len = NFSMSIZ(mp);
497 if (len == 0) {
498 mp3 = mp2 = mp;
499 } else {
500 mp2->m_next = mp;
501 mp2 = mp;
502 }
503 if ((len + mp->m_len) > NFS_MAXPATHLEN) {
504 mp->m_len = NFS_MAXPATHLEN - len;
505 len = NFS_MAXPATHLEN;
506 } else {
507 len += mp->m_len;
508 }
509 ivp->iov_base = mtod(mp, caddr_t);
510 ivp->iov_len = mp->m_len;
511 i++;
512 ivp++;
513 }
514 uiop->uio_iov = iv;
515 uiop->uio_iovcnt = i;
516 uiop->uio_offset = 0;
517 uiop->uio_resid = len;
518 uiop->uio_rw = UIO_READ;
519 uiop->uio_segflg = UIO_SYSSPACE;
520 uiop->uio_td = NULL;
521 error = VOP_READLINK(vp, uiop, cred);
522 if (error) {
523 m_freem(mp3);
524 *lenp = 0;
525 return (error);
526 }
527 if (uiop->uio_resid > 0) {
528 len -= uiop->uio_resid;
529 tlen = NFSM_RNDUP(len);
530 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len);
531 }
532 *lenp = len;
533 *mpp = mp3;
534 *mpendp = mp;
535 return (0);
536 }
537
538 /*
539 * Read vnode op call into mbuf list.
540 */
541 int
542 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred,
543 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp)
544 {
545 struct mbuf *m;
546 int i;
547 struct iovec *iv;
548 struct iovec *iv2;
549 int error = 0, len, left, siz, tlen, ioflag = 0, hi, try = 32;
550 struct mbuf *m2 = NULL, *m3;
551 struct uio io, *uiop = &io;
552 struct nfsheur *nh;
553
554 /*
555 * Calculate seqcount for heuristic
556 */
557 /*
558 * Locate best candidate
559 */
560
561 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC;
562 nh = &nfsheur[hi];
563
564 while (try--) {
565 if (nfsheur[hi].nh_vp == vp) {
566 nh = &nfsheur[hi];
567 break;
568 }
569 if (nfsheur[hi].nh_use > 0)
570 --nfsheur[hi].nh_use;
571 hi = (hi + 1) % NUM_HEURISTIC;
572 if (nfsheur[hi].nh_use < nh->nh_use)
573 nh = &nfsheur[hi];
574 }
575
576 if (nh->nh_vp != vp) {
577 nh->nh_vp = vp;
578 nh->nh_nextr = off;
579 nh->nh_use = NHUSE_INIT;
580 if (off == 0)
581 nh->nh_seqcount = 4;
582 else
583 nh->nh_seqcount = 1;
584 }
585
586 /*
587 * Calculate heuristic
588 */
589
590 if ((off == 0 && nh->nh_seqcount > 0) || off == nh->nh_nextr) {
591 if (++nh->nh_seqcount > IO_SEQMAX)
592 nh->nh_seqcount = IO_SEQMAX;
593 } else if (nh->nh_seqcount > 1) {
594 nh->nh_seqcount = 1;
595 } else {
596 nh->nh_seqcount = 0;
597 }
598 nh->nh_use += NHUSE_INC;
599 if (nh->nh_use > NHUSE_MAX)
600 nh->nh_use = NHUSE_MAX;
601 ioflag |= nh->nh_seqcount << IO_SEQSHIFT;
602
603 len = left = NFSM_RNDUP(cnt);
604 m3 = NULL;
605 /*
606 * Generate the mbuf list with the uio_iov ref. to it.
607 */
608 i = 0;
609 while (left > 0) {
610 NFSMGET(m);
611 MCLGET(m, M_WAIT);
612 m->m_len = 0;
613 siz = min(M_TRAILINGSPACE(m), left);
614 left -= siz;
615 i++;
616 if (m3)
617 m2->m_next = m;
618 else
619 m3 = m;
620 m2 = m;
621 }
622 MALLOC(iv, struct iovec *, i * sizeof (struct iovec),
623 M_TEMP, M_WAITOK);
624 uiop->uio_iov = iv2 = iv;
625 m = m3;
626 left = len;
627 i = 0;
628 while (left > 0) {
629 if (m == NULL)
630 panic("nfsvno_read iov");
631 siz = min(M_TRAILINGSPACE(m), left);
632 if (siz > 0) {
633 iv->iov_base = mtod(m, caddr_t) + m->m_len;
634 iv->iov_len = siz;
635 m->m_len += siz;
636 left -= siz;
637 iv++;
638 i++;
639 }
640 m = m->m_next;
641 }
642 uiop->uio_iovcnt = i;
643 uiop->uio_offset = off;
644 uiop->uio_resid = len;
645 uiop->uio_rw = UIO_READ;
646 uiop->uio_segflg = UIO_SYSSPACE;
647 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred);
648 FREE((caddr_t)iv2, M_TEMP);
649 if (error) {
650 m_freem(m3);
651 *mpp = NULL;
652 return (error);
653 }
654 tlen = len - uiop->uio_resid;
655 cnt = cnt < tlen ? cnt : tlen;
656 tlen = NFSM_RNDUP(cnt);
657 if (tlen == 0) {
658 m_freem(m3);
659 m3 = NULL;
660 } else if (len != tlen || tlen != cnt)
661 nfsrv_adj(m3, len - tlen, tlen - cnt);
662 *mpp = m3;
663 *mpendp = m2;
664 return (0);
665 }
666
667 /*
668 * Write vnode op from an mbuf list.
669 */
670 int
671 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable,
672 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p)
673 {
674 struct iovec *ivp;
675 int i, len;
676 struct iovec *iv;
677 int ioflags, error;
678 struct uio io, *uiop = &io;
679
680 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP,
681 M_WAITOK);
682 uiop->uio_iov = iv = ivp;
683 uiop->uio_iovcnt = cnt;
684 i = mtod(mp, caddr_t) + mp->m_len - cp;
685 len = retlen;
686 while (len > 0) {
687 if (mp == NULL)
688 panic("nfsvno_write");
689 if (i > 0) {
690 i = min(i, len);
691 ivp->iov_base = cp;
692 ivp->iov_len = i;
693 ivp++;
694 len -= i;
695 }
696 mp = mp->m_next;
697 if (mp) {
698 i = mp->m_len;
699 cp = mtod(mp, caddr_t);
700 }
701 }
702
703 if (stable == NFSWRITE_UNSTABLE)
704 ioflags = IO_NODELOCKED;
705 else
706 ioflags = (IO_SYNC | IO_NODELOCKED);
707 uiop->uio_resid = retlen;
708 uiop->uio_rw = UIO_WRITE;
709 uiop->uio_segflg = UIO_SYSSPACE;
710 NFSUIOPROC(uiop, p);
711 uiop->uio_offset = off;
712 error = VOP_WRITE(vp, uiop, ioflags, cred);
713 FREE((caddr_t)iv, M_TEMP);
714 return (error);
715 }
716
717 /*
718 * Common code for creating a regular file (plus special files for V2).
719 */
720 int
721 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp,
722 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp,
723 u_char *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp)
724 {
725 u_quad_t tempsize;
726 int error;
727
728 error = nd->nd_repstat;
729 if (!error && ndp->ni_vp == NULL) {
730 if (nvap->na_type == VREG || nvap->na_type == VSOCK) {
731 vrele(ndp->ni_startdir);
732 error = VOP_CREATE(ndp->ni_dvp,
733 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
734 vput(ndp->ni_dvp);
735 nfsvno_relpathbuf(ndp);
736 if (!error) {
737 if (*exclusive_flagp) {
738 *exclusive_flagp = 0;
739 NFSVNO_ATTRINIT(nvap);
740 NFSBCOPY(cverf,(caddr_t)&nvap->na_atime,
741 NFSX_VERF);
742 error = VOP_SETATTR(ndp->ni_vp,
743 &nvap->na_vattr, nd->nd_cred);
744 }
745 }
746 /*
747 * NFS V2 Only. nfsrvd_mknod() does this for V3.
748 * (This implies, just get out on an error.)
749 */
750 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK ||
751 nvap->na_type == VFIFO) {
752 if (nvap->na_type == VCHR && rdev == 0xffffffff)
753 nvap->na_type = VFIFO;
754 if (nvap->na_type != VFIFO &&
755 (error = priv_check_cred(nd->nd_cred,
756 PRIV_VFS_MKNOD_DEV, 0))) {
757 vrele(ndp->ni_startdir);
758 nfsvno_relpathbuf(ndp);
759 vput(ndp->ni_dvp);
760 return (error);
761 }
762 nvap->na_rdev = rdev;
763 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
764 &ndp->ni_cnd, &nvap->na_vattr);
765 vput(ndp->ni_dvp);
766 nfsvno_relpathbuf(ndp);
767 if (error) {
768 vrele(ndp->ni_startdir);
769 return (error);
770 }
771 } else {
772 vrele(ndp->ni_startdir);
773 nfsvno_relpathbuf(ndp);
774 vput(ndp->ni_dvp);
775 return (ENXIO);
776 }
777 *vpp = ndp->ni_vp;
778 } else {
779 /*
780 * Handle cases where error is already set and/or
781 * the file exists.
782 * 1 - clean up the lookup
783 * 2 - iff !error and na_size set, truncate it
784 */
785 vrele(ndp->ni_startdir);
786 nfsvno_relpathbuf(ndp);
787 *vpp = ndp->ni_vp;
788 if (ndp->ni_dvp == *vpp)
789 vrele(ndp->ni_dvp);
790 else
791 vput(ndp->ni_dvp);
792 if (!error && nvap->na_size != VNOVAL) {
793 error = nfsvno_accchk(*vpp, NFSV4ACE_ADDFILE,
794 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
795 NFSACCCHK_VPISLOCKED);
796 if (!error) {
797 tempsize = nvap->na_size;
798 NFSVNO_ATTRINIT(nvap);
799 nvap->na_size = tempsize;
800 error = VOP_SETATTR(*vpp,
801 &nvap->na_vattr, nd->nd_cred);
802 }
803 }
804 if (error)
805 vput(*vpp);
806 }
807 return (error);
808 }
809
810 /*
811 * Do a mknod vnode op.
812 */
813 int
814 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred,
815 struct thread *p)
816 {
817 int error = 0;
818 enum vtype vtyp;
819
820 vtyp = nvap->na_type;
821 /*
822 * Iff doesn't exist, create it.
823 */
824 if (ndp->ni_vp) {
825 vrele(ndp->ni_startdir);
826 nfsvno_relpathbuf(ndp);
827 vput(ndp->ni_dvp);
828 vrele(ndp->ni_vp);
829 return (EEXIST);
830 }
831 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
832 vrele(ndp->ni_startdir);
833 nfsvno_relpathbuf(ndp);
834 vput(ndp->ni_dvp);
835 return (NFSERR_BADTYPE);
836 }
837 if (vtyp == VSOCK) {
838 vrele(ndp->ni_startdir);
839 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp,
840 &ndp->ni_cnd, &nvap->na_vattr);
841 vput(ndp->ni_dvp);
842 nfsvno_relpathbuf(ndp);
843 } else {
844 if (nvap->na_type != VFIFO &&
845 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) {
846 vrele(ndp->ni_startdir);
847 nfsvno_relpathbuf(ndp);
848 vput(ndp->ni_dvp);
849 return (error);
850 }
851 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
852 &ndp->ni_cnd, &nvap->na_vattr);
853 vput(ndp->ni_dvp);
854 nfsvno_relpathbuf(ndp);
855 if (error)
856 vrele(ndp->ni_startdir);
857 /*
858 * Since VOP_MKNOD returns the ni_vp, I can't
859 * see any reason to do the lookup.
860 */
861 }
862 return (error);
863 }
864
865 /*
866 * Mkdir vnode op.
867 */
868 int
869 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid,
870 struct ucred *cred, struct thread *p, struct nfsexstuff *exp)
871 {
872 int error = 0;
873
874 if (ndp->ni_vp != NULL) {
875 if (ndp->ni_dvp == ndp->ni_vp)
876 vrele(ndp->ni_dvp);
877 else
878 vput(ndp->ni_dvp);
879 vrele(ndp->ni_vp);
880 return (EEXIST);
881 }
882 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
883 &nvap->na_vattr);
884 vput(ndp->ni_dvp);
885 nfsvno_relpathbuf(ndp);
886 return (error);
887 }
888
889 /*
890 * symlink vnode op.
891 */
892 int
893 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp,
894 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p,
895 struct nfsexstuff *exp)
896 {
897 int error = 0;
898
899 if (ndp->ni_vp) {
900 vrele(ndp->ni_startdir);
901 nfsvno_relpathbuf(ndp);
902 if (ndp->ni_dvp == ndp->ni_vp)
903 vrele(ndp->ni_dvp);
904 else
905 vput(ndp->ni_dvp);
906 vrele(ndp->ni_vp);
907 return (EEXIST);
908 }
909
910 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
911 &nvap->na_vattr, pathcp);
912 vput(ndp->ni_dvp);
913 vrele(ndp->ni_startdir);
914 nfsvno_relpathbuf(ndp);
915 /*
916 * Although FreeBSD still had the lookup code in
917 * it for 7/current, there doesn't seem to be any
918 * point, since VOP_SYMLINK() returns the ni_vp.
919 * Just vput it for v2.
920 */
921 if (!not_v2 && !error)
922 vput(ndp->ni_vp);
923 return (error);
924 }
925
926 /*
927 * Parse symbolic link arguments.
928 * This function has an ugly side effect. It will MALLOC() an area for
929 * the symlink and set iov_base to point to it, only if it succeeds.
930 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must
931 * be FREE'd later.
932 */
933 int
934 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap,
935 struct thread *p, char **pathcpp, int *lenp)
936 {
937 u_int32_t *tl;
938 char *pathcp = NULL;
939 int error = 0, len;
940 struct nfsv2_sattr *sp;
941
942 *pathcpp = NULL;
943 *lenp = 0;
944 if ((nd->nd_flag & ND_NFSV3) &&
945 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p)))
946 goto nfsmout;
947 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
948 len = fxdr_unsigned(int, *tl);
949 if (len > NFS_MAXPATHLEN || len <= 0) {
950 error = EBADRPC;
951 goto nfsmout;
952 }
953 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK);
954 error = nfsrv_mtostr(nd, pathcp, len);
955 if (error)
956 goto nfsmout;
957 if (nd->nd_flag & ND_NFSV2) {
958 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
959 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode);
960 }
961 *pathcpp = pathcp;
962 *lenp = len;
963 return (0);
964 nfsmout:
965 if (pathcp)
966 free(pathcp, M_TEMP);
967 return (error);
968 }
969
970 /*
971 * Remove a non-directory object.
972 */
973 int
974 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred,
975 struct thread *p, struct nfsexstuff *exp)
976 {
977 struct vnode *vp;
978 int error = 0;
979
980 vp = ndp->ni_vp;
981 if (vp->v_type == VDIR)
982 error = NFSERR_ISDIR;
983 else if (is_v4)
984 error = nfsrv_checkremove(vp, 1, p);
985 if (!error)
986 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd);
987 if (ndp->ni_dvp == vp)
988 vrele(ndp->ni_dvp);
989 else
990 vput(ndp->ni_dvp);
991 vput(vp);
992 return (error);
993 }
994
995 /*
996 * Remove a directory.
997 */
998 int
999 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred,
1000 struct thread *p, struct nfsexstuff *exp)
1001 {
1002 struct vnode *vp;
1003 int error = 0;
1004
1005 vp = ndp->ni_vp;
1006 if (vp->v_type != VDIR) {
1007 error = ENOTDIR;
1008 goto out;
1009 }
1010 /*
1011 * No rmdir "." please.
1012 */
1013 if (ndp->ni_dvp == vp) {
1014 error = EINVAL;
1015 goto out;
1016 }
1017 /*
1018 * The root of a mounted filesystem cannot be deleted.
1019 */
1020 if (vp->v_vflag & VV_ROOT)
1021 error = EBUSY;
1022 out:
1023 if (!error)
1024 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd);
1025 if (ndp->ni_dvp == vp)
1026 vrele(ndp->ni_dvp);
1027 else
1028 vput(ndp->ni_dvp);
1029 vput(vp);
1030 return (error);
1031 }
1032
1033 /*
1034 * Rename vnode op.
1035 */
1036 int
1037 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp,
1038 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p)
1039 {
1040 struct vnode *fvp, *tvp, *tdvp;
1041 int error = 0;
1042
1043 fvp = fromndp->ni_vp;
1044 if (ndstat) {
1045 vrele(fromndp->ni_dvp);
1046 vrele(fvp);
1047 error = ndstat;
1048 goto out1;
1049 }
1050 tdvp = tondp->ni_dvp;
1051 tvp = tondp->ni_vp;
1052 if (tvp != NULL) {
1053 if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
1054 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST;
1055 goto out;
1056 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
1057 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST;
1058 goto out;
1059 }
1060 if (tvp->v_type == VDIR && tvp->v_mountedhere) {
1061 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1062 goto out;
1063 }
1064
1065 /*
1066 * A rename to '.' or '..' results in a prematurely
1067 * unlocked vnode on FreeBSD5, so I'm just going to fail that
1068 * here.
1069 */
1070 if ((tondp->ni_cnd.cn_namelen == 1 &&
1071 tondp->ni_cnd.cn_nameptr[0] == '.') ||
1072 (tondp->ni_cnd.cn_namelen == 2 &&
1073 tondp->ni_cnd.cn_nameptr[0] == '.' &&
1074 tondp->ni_cnd.cn_nameptr[1] == '.')) {
1075 error = EINVAL;
1076 goto out;
1077 }
1078 }
1079 if (fvp->v_type == VDIR && fvp->v_mountedhere) {
1080 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1081 goto out;
1082 }
1083 if (fvp->v_mount != tdvp->v_mount) {
1084 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1085 goto out;
1086 }
1087 if (fvp == tdvp) {
1088 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL;
1089 goto out;
1090 }
1091 if (fvp == tvp) {
1092 /*
1093 * If source and destination are the same, there is nothing to
1094 * do. Set error to -1 to indicate this.
1095 */
1096 error = -1;
1097 goto out;
1098 }
1099 if (ndflag & ND_NFSV4) {
1100 NFSVOPLOCK(fvp, LK_EXCLUSIVE | LK_RETRY, p);
1101 error = nfsrv_checkremove(fvp, 0, p);
1102 NFSVOPUNLOCK(fvp, 0, p);
1103 if (tvp && !error)
1104 error = nfsrv_checkremove(tvp, 1, p);
1105 } else {
1106 /*
1107 * For NFSv2 and NFSv3, try to get rid of the delegation, so
1108 * that the NFSv4 client won't be confused by the rename.
1109 * Since nfsd_recalldelegation() can only be called on an
1110 * unlocked vnode at this point and fvp is the file that will
1111 * still exist after the rename, just do fvp.
1112 */
1113 nfsd_recalldelegation(fvp, p);
1114 }
1115 out:
1116 if (!error) {
1117 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp,
1118 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp,
1119 &tondp->ni_cnd);
1120 } else {
1121 if (tdvp == tvp)
1122 vrele(tdvp);
1123 else
1124 vput(tdvp);
1125 if (tvp)
1126 vput(tvp);
1127 vrele(fromndp->ni_dvp);
1128 vrele(fvp);
1129 if (error == -1)
1130 error = 0;
1131 }
1132 vrele(tondp->ni_startdir);
1133 nfsvno_relpathbuf(tondp);
1134 out1:
1135 vrele(fromndp->ni_startdir);
1136 nfsvno_relpathbuf(fromndp);
1137 return (error);
1138 }
1139
1140 /*
1141 * Link vnode op.
1142 */
1143 int
1144 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred,
1145 struct thread *p, struct nfsexstuff *exp)
1146 {
1147 struct vnode *xp;
1148 int error = 0;
1149
1150 xp = ndp->ni_vp;
1151 if (xp != NULL) {
1152 error = EEXIST;
1153 } else {
1154 xp = ndp->ni_dvp;
1155 if (vp->v_mount != xp->v_mount)
1156 error = EXDEV;
1157 }
1158 if (!error) {
1159 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p);
1160 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd);
1161 if (ndp->ni_dvp == vp)
1162 vrele(ndp->ni_dvp);
1163 else
1164 vput(ndp->ni_dvp);
1165 NFSVOPUNLOCK(vp, 0, p);
1166 } else {
1167 if (ndp->ni_dvp == ndp->ni_vp)
1168 vrele(ndp->ni_dvp);
1169 else
1170 vput(ndp->ni_dvp);
1171 if (ndp->ni_vp)
1172 vrele(ndp->ni_vp);
1173 }
1174 nfsvno_relpathbuf(ndp);
1175 return (error);
1176 }
1177
1178 /*
1179 * Do the fsync() appropriate for the commit.
1180 */
1181 int
1182 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred,
1183 struct thread *td)
1184 {
1185 int error = 0;
1186
1187 if (cnt > MAX_COMMIT_COUNT) {
1188 /*
1189 * Give up and do the whole thing
1190 */
1191 if (vp->v_object &&
1192 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
1193 VM_OBJECT_LOCK(vp->v_object);
1194 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC);
1195 VM_OBJECT_UNLOCK(vp->v_object);
1196 }
1197 error = VOP_FSYNC(vp, MNT_WAIT, td);
1198 } else {
1199 /*
1200 * Locate and synchronously write any buffers that fall
1201 * into the requested range. Note: we are assuming that
1202 * f_iosize is a power of 2.
1203 */
1204 int iosize = vp->v_mount->mnt_stat.f_iosize;
1205 int iomask = iosize - 1;
1206 struct bufobj *bo;
1207 daddr_t lblkno;
1208
1209 /*
1210 * Align to iosize boundry, super-align to page boundry.
1211 */
1212 if (off & iomask) {
1213 cnt += off & iomask;
1214 off &= ~(u_quad_t)iomask;
1215 }
1216 if (off & PAGE_MASK) {
1217 cnt += off & PAGE_MASK;
1218 off &= ~(u_quad_t)PAGE_MASK;
1219 }
1220 lblkno = off / iosize;
1221
1222 if (vp->v_object &&
1223 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
1224 VM_OBJECT_LOCK(vp->v_object);
1225 vm_object_page_clean(vp->v_object, off / PAGE_SIZE, (cnt + PAGE_MASK) / PAGE_SIZE, OBJPC_SYNC);
1226 VM_OBJECT_UNLOCK(vp->v_object);
1227 }
1228
1229 bo = &vp->v_bufobj;
1230 BO_LOCK(bo);
1231 while (cnt > 0) {
1232 struct buf *bp;
1233
1234 /*
1235 * If we have a buffer and it is marked B_DELWRI we
1236 * have to lock and write it. Otherwise the prior
1237 * write is assumed to have already been committed.
1238 *
1239 * gbincore() can return invalid buffers now so we
1240 * have to check that bit as well (though B_DELWRI
1241 * should not be set if B_INVAL is set there could be
1242 * a race here since we haven't locked the buffer).
1243 */
1244 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) {
1245 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL |
1246 LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) {
1247 BO_LOCK(bo);
1248 continue; /* retry */
1249 }
1250 if ((bp->b_flags & (B_DELWRI|B_INVAL)) ==
1251 B_DELWRI) {
1252 bremfree(bp);
1253 bp->b_flags &= ~B_ASYNC;
1254 bwrite(bp);
1255 ++nfs_commit_miss;
1256 } else
1257 BUF_UNLOCK(bp);
1258 BO_LOCK(bo);
1259 }
1260 ++nfs_commit_blks;
1261 if (cnt < iosize)
1262 break;
1263 cnt -= iosize;
1264 ++lblkno;
1265 }
1266 BO_UNLOCK(bo);
1267 }
1268 return (error);
1269 }
1270
1271 /*
1272 * Statfs vnode op.
1273 */
1274 int
1275 nfsvno_statfs(struct vnode *vp, struct statfs *sf)
1276 {
1277
1278 return (VFS_STATFS(vp->v_mount, sf));
1279 }
1280
1281 /*
1282 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but
1283 * must handle nfsrv_opencheck() calls after any other access checks.
1284 */
1285 void
1286 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp,
1287 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp,
1288 int *exclusive_flagp, struct nfsvattr *nvap, u_char *cverf, int create,
1289 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p,
1290 struct nfsexstuff *exp, struct vnode **vpp)
1291 {
1292 struct vnode *vp = NULL;
1293 u_quad_t tempsize;
1294 struct nfsexstuff nes;
1295
1296 if (ndp->ni_vp == NULL)
1297 nd->nd_repstat = nfsrv_opencheck(clientid,
1298 stateidp, stp, NULL, nd, p, nd->nd_repstat);
1299 if (!nd->nd_repstat) {
1300 if (ndp->ni_vp == NULL) {
1301 vrele(ndp->ni_startdir);
1302 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp,
1303 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
1304 vput(ndp->ni_dvp);
1305 nfsvno_relpathbuf(ndp);
1306 if (!nd->nd_repstat) {
1307 if (*exclusive_flagp) {
1308 *exclusive_flagp = 0;
1309 NFSVNO_ATTRINIT(nvap);
1310 NFSBCOPY(cverf,
1311 (caddr_t)&nvap->na_atime,
1312 NFSX_VERF);
1313 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp,
1314 &nvap->na_vattr, cred);
1315 } else {
1316 nfsrv_fixattr(nd, ndp->ni_vp, nvap,
1317 aclp, p, attrbitp, exp);
1318 }
1319 }
1320 vp = ndp->ni_vp;
1321 } else {
1322 if (ndp->ni_startdir)
1323 vrele(ndp->ni_startdir);
1324 nfsvno_relpathbuf(ndp);
1325 vp = ndp->ni_vp;
1326 if (create == NFSV4OPEN_CREATE) {
1327 if (ndp->ni_dvp == vp)
1328 vrele(ndp->ni_dvp);
1329 else
1330 vput(ndp->ni_dvp);
1331 }
1332 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) {
1333 if (ndp->ni_cnd.cn_flags & RDONLY)
1334 NFSVNO_SETEXRDONLY(&nes);
1335 else
1336 NFSVNO_EXINIT(&nes);
1337 nd->nd_repstat = nfsvno_accchk(vp,
1338 NFSV4ACE_ADDFILE, cred, &nes, p,
1339 NFSACCCHK_NOOVERRIDE,NFSACCCHK_VPISLOCKED);
1340 nd->nd_repstat = nfsrv_opencheck(clientid,
1341 stateidp, stp, vp, nd, p, nd->nd_repstat);
1342 if (!nd->nd_repstat) {
1343 tempsize = nvap->na_size;
1344 NFSVNO_ATTRINIT(nvap);
1345 nvap->na_size = tempsize;
1346 nd->nd_repstat = VOP_SETATTR(vp,
1347 &nvap->na_vattr, cred);
1348 }
1349 } else if (vp->v_type == VREG) {
1350 nd->nd_repstat = nfsrv_opencheck(clientid,
1351 stateidp, stp, vp, nd, p, nd->nd_repstat);
1352 }
1353 }
1354 } else {
1355 if (ndp->ni_cnd.cn_flags & HASBUF)
1356 nfsvno_relpathbuf(ndp);
1357 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) {
1358 vrele(ndp->ni_startdir);
1359 if (ndp->ni_dvp == ndp->ni_vp)
1360 vrele(ndp->ni_dvp);
1361 else
1362 vput(ndp->ni_dvp);
1363 if (ndp->ni_vp)
1364 vput(ndp->ni_vp);
1365 }
1366 }
1367 *vpp = vp;
1368 }
1369
1370 /*
1371 * Updates the file rev and sets the mtime and ctime
1372 * to the current clock time, returning the va_filerev and va_Xtime
1373 * values.
1374 */
1375 void
1376 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap,
1377 struct ucred *cred, struct thread *p)
1378 {
1379 struct vattr va;
1380
1381 VATTR_NULL(&va);
1382 getnanotime(&va.va_mtime);
1383 (void) VOP_SETATTR(vp, &va, cred);
1384 (void) nfsvno_getattr(vp, nvap, cred, p);
1385 }
1386
1387 /*
1388 * Glue routine to nfsv4_fillattr().
1389 */
1390 int
1391 nfsvno_fillattr(struct nfsrv_descript *nd, struct vnode *vp,
1392 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp,
1393 struct ucred *cred, struct thread *p, int isdgram, int reterr)
1394 {
1395 int error;
1396
1397 error = nfsv4_fillattr(nd, vp, NULL, &nvap->na_vattr, fhp, rderror,
1398 attrbitp, cred, p, isdgram, reterr);
1399 return (error);
1400 }
1401
1402 /* Since the Readdir vnode ops vary, put the entire functions in here. */
1403 /*
1404 * nfs readdir service
1405 * - mallocs what it thinks is enough to read
1406 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR
1407 * - calls nfsvno_readdir()
1408 * - loops around building the reply
1409 * if the output generated exceeds count break out of loop
1410 * The NFSM_CLGET macro is used here so that the reply will be packed
1411 * tightly in mbuf clusters.
1412 * - it only knows that it has encountered eof when the nfsvno_readdir()
1413 * reads nothing
1414 * - as such one readdir rpc will return eof false although you are there
1415 * and then the next will return eof
1416 * - it trims out records with d_fileno == 0
1417 * this doesn't matter for Unix clients, but they might confuse clients
1418 * for other os'.
1419 * - it trims out records with d_type == DT_WHT
1420 * these cannot be seen through NFS (unless we extend the protocol)
1421 * NB: It is tempting to set eof to true if the nfsvno_readdir() reads less
1422 * than requested, but this may not apply to all filesystems. For
1423 * example, client NFS does not { although it is never remote mounted
1424 * anyhow }
1425 * The alternate call nfsrvd_readdirplus() does lookups as well.
1426 * PS: The NFS protocol spec. does not clarify what the "count" byte
1427 * argument is a count of.. just name strings and file id's or the
1428 * entire reply rpc or ...
1429 * I tried just file name and id sizes and it confused the Sun client,
1430 * so I am using the full rpc size now. The "paranoia.." comment refers
1431 * to including the status longwords that are not a part of the dir.
1432 * "entry" structures, but are in the rpc.
1433 */
1434 int
1435 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram,
1436 struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
1437 {
1438 struct dirent *dp;
1439 u_int32_t *tl;
1440 int dirlen;
1441 char *cpos, *cend, *rbuf;
1442 struct nfsvattr at;
1443 int nlen, error = 0, getret = 1;
1444 int siz, cnt, fullsiz, eofflag, ncookies;
1445 u_int64_t off, toff, verf;
1446 u_long *cookies = NULL, *cookiep;
1447 struct uio io;
1448 struct iovec iv;
1449
1450 if (nd->nd_repstat) {
1451 nfsrv_postopattr(nd, getret, &at);
1452 return (0);
1453 }
1454 if (nd->nd_flag & ND_NFSV2) {
1455 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1456 off = fxdr_unsigned(u_quad_t, *tl++);
1457 } else {
1458 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1459 off = fxdr_hyper(tl);
1460 tl += 2;
1461 verf = fxdr_hyper(tl);
1462 tl += 2;
1463 }
1464 toff = off;
1465 cnt = fxdr_unsigned(int, *tl);
1466 if (cnt > NFS_SRVMAXDATA(nd))
1467 cnt = NFS_SRVMAXDATA(nd);
1468 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
1469 fullsiz = siz;
1470 if (nd->nd_flag & ND_NFSV3) {
1471 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred,
1472 p);
1473 #if 0
1474 /*
1475 * va_filerev is not sufficient as a cookie verifier,
1476 * since it is not supposed to change when entries are
1477 * removed/added unless that offset cookies returned to
1478 * the client are no longer valid.
1479 */
1480 if (!nd->nd_repstat && toff && verf != at.na_filerev)
1481 nd->nd_repstat = NFSERR_BAD_COOKIE;
1482 #endif
1483 }
1484 if (!nd->nd_repstat)
1485 nd->nd_repstat = nfsvno_accchk(vp, NFSV4ACE_SEARCH,
1486 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
1487 NFSACCCHK_VPISLOCKED);
1488 if (nd->nd_repstat) {
1489 vput(vp);
1490 if (nd->nd_flag & ND_NFSV3)
1491 nfsrv_postopattr(nd, getret, &at);
1492 return (0);
1493 }
1494 NFSVOPUNLOCK(vp, 0, p);
1495 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
1496 again:
1497 eofflag = 0;
1498 if (cookies) {
1499 free((caddr_t)cookies, M_TEMP);
1500 cookies = NULL;
1501 }
1502
1503 iv.iov_base = rbuf;
1504 iv.iov_len = siz;
1505 io.uio_iov = &iv;
1506 io.uio_iovcnt = 1;
1507 io.uio_offset = (off_t)off;
1508 io.uio_resid = siz;
1509 io.uio_segflg = UIO_SYSSPACE;
1510 io.uio_rw = UIO_READ;
1511 io.uio_td = NULL;
1512 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p);
1513 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
1514 &cookies);
1515 NFSVOPUNLOCK(vp, 0, p);
1516 off = (u_int64_t)io.uio_offset;
1517 if (io.uio_resid)
1518 siz -= io.uio_resid;
1519
1520 if (!cookies && !nd->nd_repstat)
1521 nd->nd_repstat = NFSERR_PERM;
1522 if (nd->nd_flag & ND_NFSV3) {
1523 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p);
1524 if (!nd->nd_repstat)
1525 nd->nd_repstat = getret;
1526 }
1527
1528 /*
1529 * Handles the failed cases. nd->nd_repstat == 0 past here.
1530 */
1531 if (nd->nd_repstat) {
1532 vrele(vp);
1533 free((caddr_t)rbuf, M_TEMP);
1534 if (cookies)
1535 free((caddr_t)cookies, M_TEMP);
1536 if (nd->nd_flag & ND_NFSV3)
1537 nfsrv_postopattr(nd, getret, &at);
1538 return (0);
1539 }
1540 /*
1541 * If nothing read, return eof
1542 * rpc reply
1543 */
1544 if (siz == 0) {
1545 vrele(vp);
1546 if (nd->nd_flag & ND_NFSV2) {
1547 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1548 } else {
1549 nfsrv_postopattr(nd, getret, &at);
1550 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1551 txdr_hyper(at.na_filerev, tl);
1552 tl += 2;
1553 }
1554 *tl++ = newnfs_false;
1555 *tl = newnfs_true;
1556 FREE((caddr_t)rbuf, M_TEMP);
1557 FREE((caddr_t)cookies, M_TEMP);
1558 return (0);
1559 }
1560
1561 /*
1562 * Check for degenerate cases of nothing useful read.
1563 * If so go try again
1564 */
1565 cpos = rbuf;
1566 cend = rbuf + siz;
1567 dp = (struct dirent *)cpos;
1568 cookiep = cookies;
1569
1570 /*
1571 * For some reason FreeBSD's ufs_readdir() chooses to back the
1572 * directory offset up to a block boundary, so it is necessary to
1573 * skip over the records that precede the requested offset. This
1574 * requires the assumption that file offset cookies monotonically
1575 * increase.
1576 */
1577 while (cpos < cend && ncookies > 0 &&
1578 (dp->d_fileno == 0 || dp->d_type == DT_WHT ||
1579 ((u_quad_t)(*cookiep)) <= toff)) {
1580 cpos += dp->d_reclen;
1581 dp = (struct dirent *)cpos;
1582 cookiep++;
1583 ncookies--;
1584 }
1585 if (cpos >= cend || ncookies == 0) {
1586 siz = fullsiz;
1587 toff = off;
1588 goto again;
1589 }
1590
1591 /*
1592 * dirlen is the size of the reply, including all XDR and must
1593 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate
1594 * if the XDR should be included in "count", but to be safe, we do.
1595 * (Include the two booleans at the end of the reply in dirlen now.)
1596 */
1597 if (nd->nd_flag & ND_NFSV3) {
1598 nfsrv_postopattr(nd, getret, &at);
1599 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1600 txdr_hyper(at.na_filerev, tl);
1601 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
1602 } else {
1603 dirlen = 2 * NFSX_UNSIGNED;
1604 }
1605
1606 /* Loop through the records and build reply */
1607 while (cpos < cend && ncookies > 0) {
1608 nlen = dp->d_namlen;
1609 if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
1610 nlen <= NFS_MAXNAMLEN) {
1611 if (nd->nd_flag & ND_NFSV3)
1612 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
1613 else
1614 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
1615 if (dirlen > cnt) {
1616 eofflag = 0;
1617 break;
1618 }
1619
1620 /*
1621 * Build the directory record xdr from
1622 * the dirent entry.
1623 */
1624 if (nd->nd_flag & ND_NFSV3) {
1625 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1626 *tl++ = newnfs_true;
1627 *tl++ = 0;
1628 } else {
1629 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1630 *tl++ = newnfs_true;
1631 }
1632 *tl = txdr_unsigned(dp->d_fileno);
1633 (void) nfsm_strtom(nd, dp->d_name, nlen);
1634 if (nd->nd_flag & ND_NFSV3) {
1635 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1636 *tl++ = 0;
1637 } else
1638 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1639 *tl = txdr_unsigned(*cookiep);
1640 }
1641 cpos += dp->d_reclen;
1642 dp = (struct dirent *)cpos;
1643 cookiep++;
1644 ncookies--;
1645 }
1646 if (cpos < cend)
1647 eofflag = 0;
1648 vrele(vp);
1649 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1650 *tl++ = newnfs_false;
1651 if (eofflag)
1652 *tl = newnfs_true;
1653 else
1654 *tl = newnfs_false;
1655 FREE((caddr_t)rbuf, M_TEMP);
1656 FREE((caddr_t)cookies, M_TEMP);
1657 return (0);
1658 nfsmout:
1659 vput(vp);
1660 return (error);
1661 }
1662
1663 /*
1664 * Readdirplus for V3 and Readdir for V4.
1665 */
1666 int
1667 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram,
1668 struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
1669 {
1670 struct dirent *dp;
1671 u_int32_t *tl;
1672 int dirlen;
1673 char *cpos, *cend, *rbuf;
1674 struct vnode *nvp;
1675 fhandle_t nfh;
1676 struct nfsvattr nva, at, *nvap = &nva;
1677 struct mbuf *mb0, *mb1;
1678 struct nfsreferral *refp;
1679 int nlen, r, error = 0, getret = 1, vgetret;
1680 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt;
1681 caddr_t bpos0, bpos1;
1682 u_int64_t off, toff, verf;
1683 u_long *cookies = NULL, *cookiep;
1684 nfsattrbit_t attrbits, rderrbits, savbits;
1685 struct uio io;
1686 struct iovec iv;
1687
1688 if (nd->nd_repstat) {
1689 nfsrv_postopattr(nd, getret, &at);
1690 return (0);
1691 }
1692 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
1693 off = fxdr_hyper(tl);
1694 toff = off;
1695 tl += 2;
1696 verf = fxdr_hyper(tl);
1697 tl += 2;
1698 siz = fxdr_unsigned(int, *tl++);
1699 cnt = fxdr_unsigned(int, *tl);
1700
1701 /*
1702 * Use the server's maximum data transfer size as the upper bound
1703 * on reply datalen.
1704 */
1705 if (cnt > NFS_SRVMAXDATA(nd))
1706 cnt = NFS_SRVMAXDATA(nd);
1707
1708 /*
1709 * siz is a "hint" of how much directory information (name, fileid,
1710 * cookie) should be in the reply. At least one client "hints" 0,
1711 * so I set it to cnt for that case. I also round it up to the
1712 * next multiple of DIRBLKSIZ.
1713 */
1714 if (siz == 0)
1715 siz = cnt;
1716 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
1717
1718 if (nd->nd_flag & ND_NFSV4) {
1719 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
1720 if (error)
1721 goto nfsmout;
1722 NFSSET_ATTRBIT(&savbits, &attrbits);
1723 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits);
1724 NFSZERO_ATTRBIT(&rderrbits);
1725 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR);
1726 } else {
1727 NFSZERO_ATTRBIT(&attrbits);
1728 }
1729 fullsiz = siz;
1730 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p);
1731 if (!nd->nd_repstat) {
1732 if (off && verf != at.na_filerev) {
1733 /*
1734 * va_filerev is not sufficient as a cookie verifier,
1735 * since it is not supposed to change when entries are
1736 * removed/added unless that offset cookies returned to
1737 * the client are no longer valid.
1738 */
1739 #if 0
1740 if (nd->nd_flag & ND_NFSV4) {
1741 nd->nd_repstat = NFSERR_NOTSAME;
1742 } else {
1743 nd->nd_repstat = NFSERR_BAD_COOKIE;
1744 }
1745 #endif
1746 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) {
1747 nd->nd_repstat = NFSERR_BAD_COOKIE;
1748 }
1749 }
1750 if (!nd->nd_repstat && vp->v_type != VDIR)
1751 nd->nd_repstat = NFSERR_NOTDIR;
1752 if (!nd->nd_repstat && cnt == 0)
1753 nd->nd_repstat = NFSERR_TOOSMALL;
1754 if (!nd->nd_repstat)
1755 nd->nd_repstat = nfsvno_accchk(vp, NFSV4ACE_SEARCH,
1756 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
1757 NFSACCCHK_VPISLOCKED);
1758 if (nd->nd_repstat) {
1759 vput(vp);
1760 if (nd->nd_flag & ND_NFSV3)
1761 nfsrv_postopattr(nd, getret, &at);
1762 return (0);
1763 }
1764
1765 NFSVOPUNLOCK(vp, 0, p);
1766
1767 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
1768 again:
1769 eofflag = 0;
1770 if (cookies) {
1771 free((caddr_t)cookies, M_TEMP);
1772 cookies = NULL;
1773 }
1774
1775 iv.iov_base = rbuf;
1776 iv.iov_len = siz;
1777 io.uio_iov = &iv;
1778 io.uio_iovcnt = 1;
1779 io.uio_offset = (off_t)off;
1780 io.uio_resid = siz;
1781 io.uio_segflg = UIO_SYSSPACE;
1782 io.uio_rw = UIO_READ;
1783 io.uio_td = NULL;
1784 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p);
1785 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
1786 &cookies);
1787 NFSVOPUNLOCK(vp, 0, p);
1788 off = (u_int64_t)io.uio_offset;
1789 if (io.uio_resid)
1790 siz -= io.uio_resid;
1791
1792 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p);
1793
1794 if (!cookies && !nd->nd_repstat)
1795 nd->nd_repstat = NFSERR_PERM;
1796 if (!nd->nd_repstat)
1797 nd->nd_repstat = getret;
1798 if (nd->nd_repstat) {
1799 vrele(vp);
1800 if (cookies)
1801 free((caddr_t)cookies, M_TEMP);
1802 free((caddr_t)rbuf, M_TEMP);
1803 if (nd->nd_flag & ND_NFSV3)
1804 nfsrv_postopattr(nd, getret, &at);
1805 return (0);
1806 }
1807 /*
1808 * If nothing read, return eof
1809 * rpc reply
1810 */
1811 if (siz == 0) {
1812 vrele(vp);
1813 if (nd->nd_flag & ND_NFSV3)
1814 nfsrv_postopattr(nd, getret, &at);
1815 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1816 txdr_hyper(at.na_filerev, tl);
1817 tl += 2;
1818 *tl++ = newnfs_false;
1819 *tl = newnfs_true;
1820 free((caddr_t)cookies, M_TEMP);
1821 free((caddr_t)rbuf, M_TEMP);
1822 return (0);
1823 }
1824
1825 /*
1826 * Check for degenerate cases of nothing useful read.
1827 * If so go try again
1828 */
1829 cpos = rbuf;
1830 cend = rbuf + siz;
1831 dp = (struct dirent *)cpos;
1832 cookiep = cookies;
1833
1834 /*
1835 * For some reason FreeBSD's ufs_readdir() chooses to back the
1836 * directory offset up to a block boundary, so it is necessary to
1837 * skip over the records that precede the requested offset. This
1838 * requires the assumption that file offset cookies monotonically
1839 * increase.
1840 */
1841 while (cpos < cend && ncookies > 0 &&
1842 (dp->d_fileno == 0 || dp->d_type == DT_WHT ||
1843 ((u_quad_t)(*cookiep)) <= toff ||
1844 ((nd->nd_flag & ND_NFSV4) &&
1845 ((dp->d_namlen == 1 && dp->d_name[0] == '.') ||
1846 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) {
1847 cpos += dp->d_reclen;
1848 dp = (struct dirent *)cpos;
1849 cookiep++;
1850 ncookies--;
1851 }
1852 if (cpos >= cend || ncookies == 0) {
1853 siz = fullsiz;
1854 toff = off;
1855 goto again;
1856 }
1857
1858 /*
1859 * Probe one of the directory entries to see if the filesystem
1860 * supports VGET for NFSv3. For NFSv4, it will return an
1861 * error later, if attributes are required.
1862 * (To be honest, most if not all NFSv4 clients will require
1863 * attributes, but??)
1864 */
1865 if ((nd->nd_flag & ND_NFSV3)) {
1866 vgetret = VFS_VGET(vp->v_mount, dp->d_fileno, LK_EXCLUSIVE,
1867 &nvp);
1868 if (vgetret != 0) {
1869 if (vgetret == EOPNOTSUPP)
1870 nd->nd_repstat = NFSERR_NOTSUPP;
1871 else
1872 nd->nd_repstat = NFSERR_SERVERFAULT;
1873 vrele(vp);
1874 if (cookies)
1875 free((caddr_t)cookies, M_TEMP);
1876 free((caddr_t)rbuf, M_TEMP);
1877 nfsrv_postopattr(nd, getret, &at);
1878 return (0);
1879 }
1880 if (!vgetret)
1881 vput(nvp);
1882 nvp = NULL;
1883 }
1884
1885 /*
1886 * Save this position, in case there is an error before one entry
1887 * is created.
1888 */
1889 mb0 = nd->nd_mb;
1890 bpos0 = nd->nd_bpos;
1891
1892 /*
1893 * Fill in the first part of the reply.
1894 * dirlen is the reply length in bytes and cannot exceed cnt.
1895 * (Include the two booleans at the end of the reply in dirlen now,
1896 * so we recognize when we have exceeded cnt.)
1897 */
1898 if (nd->nd_flag & ND_NFSV3) {
1899 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
1900 nfsrv_postopattr(nd, getret, &at);
1901 } else {
1902 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED;
1903 }
1904 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
1905 txdr_hyper(at.na_filerev, tl);
1906
1907 /*
1908 * Save this position, in case there is an empty reply needed.
1909 */
1910 mb1 = nd->nd_mb;
1911 bpos1 = nd->nd_bpos;
1912
1913 /* Loop through the records and build reply */
1914 entrycnt = 0;
1915 while (cpos < cend && ncookies > 0 && dirlen < cnt) {
1916 nlen = dp->d_namlen;
1917 if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
1918 nlen <= NFS_MAXNAMLEN &&
1919 ((nd->nd_flag & ND_NFSV3) || nlen > 2 ||
1920 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.'))
1921 || (nlen == 1 && dp->d_name[0] != '.'))) {
1922 /*
1923 * Save the current position in the reply, in case
1924 * this entry exceeds cnt.
1925 */
1926 mb1 = nd->nd_mb;
1927 bpos1 = nd->nd_bpos;
1928
1929 /*
1930 * For readdir_and_lookup get the vnode using
1931 * the file number.
1932 */
1933 nvp = NULL;
1934 refp = NULL;
1935 r = 0;
1936 if ((nd->nd_flag & ND_NFSV3) ||
1937 NFSNONZERO_ATTRBIT(&savbits)) {
1938 if (nd->nd_flag & ND_NFSV4)
1939 refp = nfsv4root_getreferral(NULL,
1940 vp, dp->d_fileno);
1941 if (refp == NULL)
1942 r = VFS_VGET(vp->v_mount, dp->d_fileno,
1943 LK_EXCLUSIVE, &nvp);
1944 if (!r) {
1945 if (refp == NULL &&
1946 ((nd->nd_flag & ND_NFSV3) ||
1947 NFSNONZERO_ATTRBIT(&attrbits))) {
1948 r = nfsvno_getfh(nvp, &nfh, p);
1949 if (!r)
1950 r = nfsvno_getattr(nvp, nvap,
1951 nd->nd_cred, p);
1952 }
1953 } else {
1954 nvp = NULL;
1955 }
1956 if (r) {
1957 if (!NFSISSET_ATTRBIT(&attrbits,
1958 NFSATTRBIT_RDATTRERROR)) {
1959 if (nvp != NULL)
1960 vput(nvp);
1961 nd->nd_repstat = r;
1962 break;
1963 }
1964 }
1965 }
1966
1967 /*
1968 * Build the directory record xdr
1969 */
1970 if (nd->nd_flag & ND_NFSV3) {
1971 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1972 *tl++ = newnfs_true;
1973 *tl++ = 0;
1974 *tl = txdr_unsigned(dp->d_fileno);
1975 dirlen += nfsm_strtom(nd, dp->d_name, nlen);
1976 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1977 *tl++ = 0;
1978 *tl = txdr_unsigned(*cookiep);
1979 nfsrv_postopattr(nd, 0, nvap);
1980 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1);
1981 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR);
1982 if (nvp != NULL)
1983 vput(nvp);
1984 } else {
1985 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1986 *tl++ = newnfs_true;
1987 *tl++ = 0;
1988 *tl = txdr_unsigned(*cookiep);
1989 dirlen += nfsm_strtom(nd, dp->d_name, nlen);
1990 if (nvp != NULL)
1991 NFSVOPUNLOCK(nvp, 0, p);
1992 if (refp != NULL) {
1993 dirlen += nfsrv_putreferralattr(nd,
1994 &savbits, refp, 0,
1995 &nd->nd_repstat);
1996 if (nd->nd_repstat) {
1997 if (nvp != NULL)
1998 vrele(nvp);
1999 break;
2000 }
2001 } else if (r) {
2002 dirlen += nfsvno_fillattr(nd, nvp, nvap,
2003 &nfh, r, &rderrbits, nd->nd_cred,
2004 p, isdgram, 0);
2005 } else {
2006 dirlen += nfsvno_fillattr(nd, nvp, nvap,
2007 &nfh, r, &attrbits, nd->nd_cred,
2008 p, isdgram, 0);
2009 }
2010 if (nvp != NULL)
2011 vrele(nvp);
2012 dirlen += (3 * NFSX_UNSIGNED);
2013 }
2014 if (dirlen <= cnt)
2015 entrycnt++;
2016 }
2017 cpos += dp->d_reclen;
2018 dp = (struct dirent *)cpos;
2019 cookiep++;
2020 ncookies--;
2021 }
2022 vrele(vp);
2023
2024 /*
2025 * If dirlen > cnt, we must strip off the last entry. If that
2026 * results in an empty reply, report NFSERR_TOOSMALL.
2027 */
2028 if (dirlen > cnt || nd->nd_repstat) {
2029 if (!nd->nd_repstat && entrycnt == 0)
2030 nd->nd_repstat = NFSERR_TOOSMALL;
2031 if (nd->nd_repstat)
2032 newnfs_trimtrailing(nd, mb0, bpos0);
2033 else
2034 newnfs_trimtrailing(nd, mb1, bpos1);
2035 eofflag = 0;
2036 } else if (cpos < cend)
2037 eofflag = 0;
2038 if (!nd->nd_repstat) {
2039 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2040 *tl++ = newnfs_false;
2041 if (eofflag)
2042 *tl = newnfs_true;
2043 else
2044 *tl = newnfs_false;
2045 }
2046 FREE((caddr_t)cookies, M_TEMP);
2047 FREE((caddr_t)rbuf, M_TEMP);
2048 return (0);
2049 nfsmout:
2050 vput(vp);
2051 return (error);
2052 }
2053
2054 /*
2055 * Get the settable attributes out of the mbuf list.
2056 * (Return 0 or EBADRPC)
2057 */
2058 int
2059 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap,
2060 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
2061 {
2062 u_int32_t *tl;
2063 struct nfsv2_sattr *sp;
2064 struct timeval curtime;
2065 int error = 0, toclient = 0;
2066
2067 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) {
2068 case ND_NFSV2:
2069 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2070 /*
2071 * Some old clients didn't fill in the high order 16bits.
2072 * --> check the low order 2 bytes for 0xffff
2073 */
2074 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
2075 nvap->na_mode = nfstov_mode(sp->sa_mode);
2076 if (sp->sa_uid != newnfs_xdrneg1)
2077 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid);
2078 if (sp->sa_gid != newnfs_xdrneg1)
2079 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid);
2080 if (sp->sa_size != newnfs_xdrneg1)
2081 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size);
2082 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) {
2083 #ifdef notyet
2084 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime);
2085 #else
2086 nvap->na_atime.tv_sec =
2087 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec);
2088 nvap->na_atime.tv_nsec = 0;
2089 #endif
2090 }
2091 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1)
2092 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime);
2093 break;
2094 case ND_NFSV3:
2095 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2096 if (*tl == newnfs_true) {
2097 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2098 nvap->na_mode = nfstov_mode(*tl);
2099 }
2100 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2101 if (*tl == newnfs_true) {
2102 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2103 nvap->na_uid = fxdr_unsigned(uid_t, *tl);
2104 }
2105 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2106 if (*tl == newnfs_true) {
2107 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2108 nvap->na_gid = fxdr_unsigned(gid_t, *tl);
2109 }
2110 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2111 if (*tl == newnfs_true) {
2112 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2113 nvap->na_size = fxdr_hyper(tl);
2114 }
2115 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2116 switch (fxdr_unsigned(int, *tl)) {
2117 case NFSV3SATTRTIME_TOCLIENT:
2118 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2119 fxdr_nfsv3time(tl, &nvap->na_atime);
2120 toclient = 1;
2121 break;
2122 case NFSV3SATTRTIME_TOSERVER:
2123 NFSGETTIME(&curtime);
2124 nvap->na_atime.tv_sec = curtime.tv_sec;
2125 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000;
2126 nvap->na_vaflags |= VA_UTIMES_NULL;
2127 break;
2128 };
2129 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2130 switch (fxdr_unsigned(int, *tl)) {
2131 case NFSV3SATTRTIME_TOCLIENT:
2132 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2133 fxdr_nfsv3time(tl, &nvap->na_mtime);
2134 nvap->na_vaflags &= ~VA_UTIMES_NULL;
2135 break;
2136 case NFSV3SATTRTIME_TOSERVER:
2137 NFSGETTIME(&curtime);
2138 nvap->na_mtime.tv_sec = curtime.tv_sec;
2139 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000;
2140 if (!toclient)
2141 nvap->na_vaflags |= VA_UTIMES_NULL;
2142 break;
2143 };
2144 break;
2145 case ND_NFSV4:
2146 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p);
2147 };
2148 nfsmout:
2149 return (error);
2150 }
2151
2152 /*
2153 * Handle the setable attributes for V4.
2154 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise.
2155 */
2156 int
2157 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap,
2158 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
2159 {
2160 u_int32_t *tl;
2161 int attrsum = 0;
2162 int i, j;
2163 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0;
2164 int toclient = 0;
2165 u_char *cp, namestr[NFSV4_SMALLSTR + 1];
2166 uid_t uid;
2167 gid_t gid;
2168 struct timeval curtime;
2169
2170 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup);
2171 if (error)
2172 return (error);
2173 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2174 attrsize = fxdr_unsigned(int, *tl);
2175
2176 /*
2177 * Loop around getting the setable attributes. If an unsupported
2178 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return.
2179 */
2180 if (retnotsup) {
2181 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2182 bitpos = NFSATTRBIT_MAX;
2183 } else {
2184 bitpos = 0;
2185 }
2186 for (; bitpos < NFSATTRBIT_MAX; bitpos++) {
2187 if (attrsum > attrsize) {
2188 error = NFSERR_BADXDR;
2189 goto nfsmout;
2190 }
2191 if (NFSISSET_ATTRBIT(attrbitp, bitpos))
2192 switch (bitpos) {
2193 case NFSATTRBIT_SIZE:
2194 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
2195 nvap->na_size = fxdr_hyper(tl);
2196 attrsum += NFSX_HYPER;
2197 break;
2198 case NFSATTRBIT_ACL:
2199 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize,
2200 p);
2201 if (error)
2202 goto nfsmout;
2203 if (aceerr && !nd->nd_repstat)
2204 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2205 attrsum += aclsize;
2206 break;
2207 case NFSATTRBIT_ARCHIVE:
2208 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2209 if (!nd->nd_repstat)
2210 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2211 attrsum += NFSX_UNSIGNED;
2212 break;
2213 case NFSATTRBIT_HIDDEN:
2214 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2215 if (!nd->nd_repstat)
2216 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2217 attrsum += NFSX_UNSIGNED;
2218 break;
2219 case NFSATTRBIT_MIMETYPE:
2220 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2221 i = fxdr_unsigned(int, *tl);
2222 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
2223 if (error)
2224 goto nfsmout;
2225 if (!nd->nd_repstat)
2226 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2227 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i));
2228 break;
2229 case NFSATTRBIT_MODE:
2230 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2231 nvap->na_mode = nfstov_mode(*tl);
2232 attrsum += NFSX_UNSIGNED;
2233 break;
2234 case NFSATTRBIT_OWNER:
2235 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2236 j = fxdr_unsigned(int, *tl);
2237 if (j < 0)
2238 return (NFSERR_BADXDR);
2239 if (j > NFSV4_SMALLSTR)
2240 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
2241 else
2242 cp = namestr;
2243 error = nfsrv_mtostr(nd, cp, j);
2244 if (error) {
2245 if (j > NFSV4_SMALLSTR)
2246 free(cp, M_NFSSTRING);
2247 return (error);
2248 }
2249 if (!nd->nd_repstat) {
2250 nd->nd_repstat = nfsv4_strtouid(cp,j,&uid,p);
2251 if (!nd->nd_repstat)
2252 nvap->na_uid = uid;
2253 }
2254 if (j > NFSV4_SMALLSTR)
2255 free(cp, M_NFSSTRING);
2256 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
2257 break;
2258 case NFSATTRBIT_OWNERGROUP:
2259 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2260 j = fxdr_unsigned(int, *tl);
2261 if (j < 0)
2262 return (NFSERR_BADXDR);
2263 if (j > NFSV4_SMALLSTR)
2264 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
2265 else
2266 cp = namestr;
2267 error = nfsrv_mtostr(nd, cp, j);
2268 if (error) {
2269 if (j > NFSV4_SMALLSTR)
2270 free(cp, M_NFSSTRING);
2271 return (error);
2272 }
2273 if (!nd->nd_repstat) {
2274 nd->nd_repstat = nfsv4_strtogid(cp,j,&gid,p);
2275 if (!nd->nd_repstat)
2276 nvap->na_gid = gid;
2277 }
2278 if (j > NFSV4_SMALLSTR)
2279 free(cp, M_NFSSTRING);
2280 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
2281 break;
2282 case NFSATTRBIT_SYSTEM:
2283 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2284 if (!nd->nd_repstat)
2285 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2286 attrsum += NFSX_UNSIGNED;
2287 break;
2288 case NFSATTRBIT_TIMEACCESSSET:
2289 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2290 attrsum += NFSX_UNSIGNED;
2291 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
2292 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2293 fxdr_nfsv4time(tl, &nvap->na_atime);
2294 toclient = 1;
2295 attrsum += NFSX_V4TIME;
2296 } else {
2297 NFSGETTIME(&curtime);
2298 nvap->na_atime.tv_sec = curtime.tv_sec;
2299 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000;
2300 nvap->na_vaflags |= VA_UTIMES_NULL;
2301 }
2302 break;
2303 case NFSATTRBIT_TIMEBACKUP:
2304 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2305 if (!nd->nd_repstat)
2306 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2307 attrsum += NFSX_V4TIME;
2308 break;
2309 case NFSATTRBIT_TIMECREATE:
2310 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2311 if (!nd->nd_repstat)
2312 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2313 attrsum += NFSX_V4TIME;
2314 break;
2315 case NFSATTRBIT_TIMEMODIFYSET:
2316 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2317 attrsum += NFSX_UNSIGNED;
2318 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
2319 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2320 fxdr_nfsv4time(tl, &nvap->na_mtime);
2321 nvap->na_vaflags &= ~VA_UTIMES_NULL;
2322 attrsum += NFSX_V4TIME;
2323 } else {
2324 NFSGETTIME(&curtime);
2325 nvap->na_mtime.tv_sec = curtime.tv_sec;
2326 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000;
2327 if (!toclient)
2328 nvap->na_vaflags |= VA_UTIMES_NULL;
2329 }
2330 break;
2331 default:
2332 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2333 /*
2334 * set bitpos so we drop out of the loop.
2335 */
2336 bitpos = NFSATTRBIT_MAX;
2337 break;
2338 };
2339 }
2340
2341 /*
2342 * some clients pad the attrlist, so we need to skip over the
2343 * padding.
2344 */
2345 if (attrsum > attrsize) {
2346 error = NFSERR_BADXDR;
2347 } else {
2348 attrsize = NFSM_RNDUP(attrsize);
2349 if (attrsum < attrsize)
2350 error = nfsm_advance(nd, attrsize - attrsum, -1);
2351 }
2352 nfsmout:
2353 return (error);
2354 }
2355
2356 /*
2357 * Check/setup export credentials.
2358 */
2359 int
2360 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp,
2361 struct ucred *credanon)
2362 {
2363 int error = 0;
2364
2365 /*
2366 * Check/setup credentials.
2367 */
2368 if (nd->nd_flag & ND_GSS)
2369 exp->nes_exflag &= ~MNT_EXPORTANON;
2370
2371 /*
2372 * Check to see if the operation is allowed for this security flavor.
2373 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to
2374 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS.
2375 * Also, allow Secinfo, so that it can acquire the correct flavor(s).
2376 */
2377 if (nfsvno_testexp(nd, exp) &&
2378 nd->nd_procnum != NFSV4OP_SECINFO &&
2379 nd->nd_procnum != NFSPROC_FSINFO) {
2380 if (nd->nd_flag & ND_NFSV4)
2381 error = NFSERR_WRONGSEC;
2382 else
2383 error = (NFSERR_AUTHERR | AUTH_TOOWEAK);
2384 return (error);
2385 }
2386
2387 /*
2388 * Check to see if the file system is exported V4 only.
2389 */
2390 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4))
2391 return (NFSERR_PROGNOTV4);
2392
2393 /*
2394 * Now, map the user credentials.
2395 * (Note that ND_AUTHNONE will only be set for an NFSv3
2396 * Fsinfo RPC. If set for anything else, this code might need
2397 * to change.)
2398 */
2399 if (NFSVNO_EXPORTED(exp) &&
2400 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) ||
2401 NFSVNO_EXPORTANON(exp) ||
2402 (nd->nd_flag & ND_AUTHNONE))) {
2403 nd->nd_cred->cr_uid = credanon->cr_uid;
2404 nd->nd_cred->cr_gid = credanon->cr_gid;
2405 crsetgroups(nd->nd_cred, credanon->cr_ngroups,
2406 credanon->cr_groups);
2407 }
2408 return (0);
2409 }
2410
2411 /*
2412 * Check exports.
2413 */
2414 int
2415 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp,
2416 struct ucred **credp)
2417 {
2418 int i, error, *secflavors;
2419
2420 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
2421 &exp->nes_numsecflavor, &secflavors);
2422 if (error) {
2423 if (nfs_rootfhset) {
2424 exp->nes_exflag = 0;
2425 exp->nes_numsecflavor = 0;
2426 error = 0;
2427 }
2428 } else {
2429 /* Copy the security flavors. */
2430 for (i = 0; i < exp->nes_numsecflavor; i++)
2431 exp->nes_secflavors[i] = secflavors[i];
2432 }
2433 return (error);
2434 }
2435
2436 /*
2437 * Get a vnode for a file handle and export stuff.
2438 */
2439 int
2440 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam,
2441 struct vnode **vpp, struct nfsexstuff *exp, struct ucred **credp)
2442 {
2443 int i, error, *secflavors;
2444
2445 *credp = NULL;
2446 exp->nes_numsecflavor = 0;
2447 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp);
2448 if (nam && !error) {
2449 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
2450 &exp->nes_numsecflavor, &secflavors);
2451 if (error) {
2452 if (nfs_rootfhset) {
2453 exp->nes_exflag = 0;
2454 exp->nes_numsecflavor = 0;
2455 error = 0;
2456 } else {
2457 vput(*vpp);
2458 }
2459 } else {
2460 /* Copy the security flavors. */
2461 for (i = 0; i < exp->nes_numsecflavor; i++)
2462 exp->nes_secflavors[i] = secflavors[i];
2463 }
2464 }
2465 return (error);
2466 }
2467
2468 /*
2469 * Do the pathconf vnode op.
2470 */
2471 int
2472 nfsvno_pathconf(struct vnode *vp, int flag, register_t *retf,
2473 struct ucred *cred, struct thread *p)
2474 {
2475 int error;
2476
2477 error = VOP_PATHCONF(vp, flag, retf);
2478 return (error);
2479 }
2480
2481 /*
2482 * nfsd_fhtovp() - convert a fh to a vnode ptr
2483 * - look up fsid in mount list (if not found ret error)
2484 * - get vp and export rights by calling nfsvno_fhtovp()
2485 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
2486 * for AUTH_SYS
2487 * Also handle getting the Giant lock for the file system,
2488 * as required:
2489 * - if same mount point as *mpp
2490 * do nothing
2491 * else if *mpp == NULL
2492 * if already locked
2493 * leave it locked
2494 * else
2495 * call VFS_LOCK_GIANT()
2496 * else
2497 * if already locked
2498 * unlock Giant
2499 * call VFS_LOCK_GIANT()
2500 */
2501 void
2502 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp,
2503 struct vnode **vpp, struct nfsexstuff *exp,
2504 struct mount **mpp, int startwrite, struct thread *p)
2505 {
2506 struct mount *mp;
2507 struct ucred *credanon;
2508 fhandle_t *fhp;
2509
2510 fhp = (fhandle_t *)nfp->nfsrvfh_data;
2511 /*
2512 * Check for the special case of the nfsv4root_fh.
2513 */
2514 mp = vfs_getvfs(&fhp->fh_fsid);
2515 if (!mp) {
2516 *vpp = NULL;
2517 nd->nd_repstat = ESTALE;
2518 if (*mpp && exp->nes_vfslocked)
2519 VFS_UNLOCK_GIANT(*mpp);
2520 *mpp = NULL;
2521 exp->nes_vfslocked = 0;
2522 return;
2523 }
2524
2525 /*
2526 * Now, handle Giant for the file system.
2527 */
2528 if (*mpp != NULL && *mpp != mp && exp->nes_vfslocked) {
2529 VFS_UNLOCK_GIANT(*mpp);
2530 exp->nes_vfslocked = 0;
2531 }
2532 if (!exp->nes_vfslocked && *mpp != mp)
2533 exp->nes_vfslocked = VFS_LOCK_GIANT(mp);
2534
2535 *mpp = mp;
2536 if (startwrite)
2537 vn_start_write(NULL, mpp, V_WAIT);
2538
2539 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, vpp, exp,
2540 &credanon);
2541
2542 /*
2543 * For NFSv4 without a pseudo root fs, unexported file handles
2544 * can be returned, so that Lookup works everywhere.
2545 */
2546 if (!nd->nd_repstat && exp->nes_exflag == 0 &&
2547 !(nd->nd_flag & ND_NFSV4)) {
2548 vput(*vpp);
2549 nd->nd_repstat = EACCES;
2550 }
2551
2552 /*
2553 * Personally, I've never seen any point in requiring a
2554 * reserved port#, since only in the rare case where the
2555 * clients are all boxes with secure system priviledges,
2556 * does it provide any enhanced security, but... some people
2557 * believe it to be useful and keep putting this code back in.
2558 * (There is also some "security checker" out there that
2559 * complains if the nfs server doesn't enforce this.)
2560 * However, note the following:
2561 * RFC3530 (NFSv4) specifies that a reserved port# not be
2562 * required.
2563 * RFC2623 recommends that, if a reserved port# is checked for,
2564 * that there be a way to turn that off--> ifdef'd.
2565 */
2566 #ifdef NFS_REQRSVPORT
2567 if (!nd->nd_repstat) {
2568 struct sockaddr_in *saddr;
2569 struct sockaddr_in6 *saddr6;
2570
2571 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *);
2572 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *);
2573 if (!(nd->nd_flag & ND_NFSV4) &&
2574 ((saddr->sin_family == AF_INET &&
2575 ntohs(saddr->sin_port) >= IPPORT_RESERVED) ||
2576 (saddr6->sin6_family == AF_INET6 &&
2577 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) {
2578 vput(*vpp);
2579 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
2580 }
2581 }
2582 #endif /* NFS_REQRSVPORT */
2583
2584 /*
2585 * Check/setup credentials.
2586 */
2587 if (!nd->nd_repstat) {
2588 nd->nd_saveduid = nd->nd_cred->cr_uid;
2589 nd->nd_repstat = nfsd_excred(nd, exp, credanon);
2590 if (nd->nd_repstat)
2591 vput(*vpp);
2592 }
2593 if (credanon != NULL)
2594 crfree(credanon);
2595 if (nd->nd_repstat) {
2596 if (startwrite)
2597 vn_finished_write(mp);
2598 if (exp->nes_vfslocked) {
2599 VFS_UNLOCK_GIANT(mp);
2600 exp->nes_vfslocked = 0;
2601 }
2602 vfs_rel(mp);
2603 *vpp = NULL;
2604 *mpp = NULL;
2605 } else {
2606 vfs_rel(mp);
2607 }
2608 }
2609
2610 /*
2611 * glue for fp.
2612 */
2613 int
2614 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp)
2615 {
2616 struct filedesc *fdp;
2617 struct file *fp;
2618
2619 fdp = p->td_proc->p_fd;
2620 if (fd >= fdp->fd_nfiles ||
2621 (fp = fdp->fd_ofiles[fd]) == NULL)
2622 return (EBADF);
2623 *fpp = fp;
2624 return (0);
2625 }
2626
2627 /*
2628 * Called from nfssvc() to update the exports list. Just call
2629 * vfs_export(). This has to be done, since the v4 root fake fs isn't
2630 * in the mount list.
2631 */
2632 int
2633 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p)
2634 {
2635 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp;
2636 int error;
2637 struct nameidata nd;
2638 fhandle_t fh;
2639
2640 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export);
2641 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT)) {
2642 nfs_rootfhset = 0;
2643 nfsv4root_set = 0;
2644 } else if (error == 0) {
2645 if (nfsexargp->fspec == NULL)
2646 return (EPERM);
2647 /*
2648 * If fspec != NULL, this is the v4root path.
2649 */
2650 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_USERSPACE,
2651 nfsexargp->fspec, p);
2652 if ((error = namei(&nd)) != 0)
2653 return (error);
2654 error = nfsvno_getfh(nd.ni_vp, &fh, p);
2655 vrele(nd.ni_vp);
2656 if (!error) {
2657 nfs_rootfh.nfsrvfh_len = NFSX_MYFH;
2658 NFSBCOPY((caddr_t)&fh,
2659 nfs_rootfh.nfsrvfh_data,
2660 sizeof (fhandle_t));
2661 nfs_rootfhset = 1;
2662 }
2663 }
2664 return (error);
2665 }
2666
2667 /*
2668 * Get the tcp socket sequence numbers we need.
2669 * (Maybe this should be moved to the tcp sources?)
2670 */
2671 int
2672 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap)
2673 {
2674 struct inpcb *inp;
2675 struct tcpcb *tp;
2676 int error = EPIPE;
2677
2678 INP_INFO_RLOCK(&V_tcbinfo);
2679 inp = sotoinpcb(so);
2680 if (inp == NULL) {
2681 INP_INFO_RUNLOCK(&V_tcbinfo);
2682 return (error);
2683 }
2684 INP_RLOCK(inp);
2685 INP_INFO_RUNLOCK(&V_tcbinfo);
2686 tp = intotcpcb(inp);
2687 if (tp != NULL && tp->t_state == TCPS_ESTABLISHED) {
2688 *maxp = tp->snd_max;
2689 *unap = tp->snd_una;
2690 error = 0;
2691 }
2692 INP_RUNLOCK(inp);
2693 return (error);
2694 }
2695
2696 /*
2697 * This function needs to test to see if the system is near its limit
2698 * for memory allocation via malloc() or mget() and return True iff
2699 * either of these resources are near their limit.
2700 * XXX (For now, this is just a stub.)
2701 */
2702 int nfsrv_testmalloclimit = 0;
2703 int
2704 nfsrv_mallocmget_limit(void)
2705 {
2706 static int printmesg = 0;
2707 static int testval = 1;
2708
2709 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) {
2710 if ((printmesg++ % 100) == 0)
2711 printf("nfsd: malloc/mget near limit\n");
2712 return (1);
2713 }
2714 return (0);
2715 }
2716
2717 /*
2718 * BSD specific initialization of a mount point.
2719 */
2720 void
2721 nfsd_mntinit(void)
2722 {
2723 static int inited = 0;
2724
2725 if (inited)
2726 return;
2727 inited = 1;
2728 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED);
2729 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist);
2730 nfsv4root_mnt.mnt_export = NULL;
2731 TAILQ_INIT(&nfsv4root_opt);
2732 TAILQ_INIT(&nfsv4root_newopt);
2733 nfsv4root_mnt.mnt_opt = &nfsv4root_opt;
2734 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt;
2735 nfsv4root_mnt.mnt_nvnodelistsize = 0;
2736 }
2737
2738 /*
2739 * Get a vnode for a file handle, without checking exports, etc.
2740 */
2741 struct vnode *
2742 nfsvno_getvp(fhandle_t *fhp)
2743 {
2744 struct mount *mp;
2745 struct vnode *vp;
2746 int error;
2747
2748 mp = vfs_getvfs(&fhp->fh_fsid);
2749 if (mp == NULL)
2750 return (NULL);
2751 error = VFS_FHTOVP(mp, &fhp->fh_fid, &vp);
2752 if (error)
2753 return (NULL);
2754 return (vp);
2755 }
2756
2757 /*
2758 * Check to see it a byte range lock held by a process running
2759 * locally on the server conflicts with the new lock.
2760 */
2761 int
2762 nfsvno_localconflict(struct vnode *vp, int ftype, u_int64_t first,
2763 u_int64_t end, struct nfslockconflict *cfp, struct thread *td)
2764 {
2765 int error;
2766 struct flock fl;
2767
2768 if (!nfsrv_dolocallocks)
2769 return (0);
2770 fl.l_whence = SEEK_SET;
2771 fl.l_type = ftype;
2772 fl.l_start = (off_t)first;
2773 if (end == NFS64BITSSET)
2774 fl.l_len = 0;
2775 else
2776 fl.l_len = (off_t)(end - first);
2777 /*
2778 * For FreeBSD8, the l_pid and l_sysid must be set to the same
2779 * values for all calls, so that all locks will be held by the
2780 * nfsd server. (The nfsd server handles conflicts between the
2781 * various clients.)
2782 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024
2783 * bytes, so it can't be put in l_sysid.
2784 */
2785 if (nfsv4_sysid == 0)
2786 nfsv4_sysid = nlm_acquire_next_sysid();
2787 fl.l_pid = (pid_t)0;
2788 fl.l_sysid = (int)nfsv4_sysid;
2789
2790 NFSVOPUNLOCK(vp, 0, td);
2791 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_GETLK, &fl,
2792 (F_POSIX | F_REMOTE));
2793 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, td);
2794 if (error)
2795 return (error);
2796 if (fl.l_type == F_UNLCK)
2797 return (0);
2798 if (cfp != NULL) {
2799 cfp->cl_clientid.lval[0] = cfp->cl_clientid.lval[1] = 0;
2800 cfp->cl_first = (u_int64_t)fl.l_start;
2801 if (fl.l_len == 0)
2802 cfp->cl_end = NFS64BITSSET;
2803 else
2804 cfp->cl_end = (u_int64_t)
2805 (fl.l_start + fl.l_len);
2806 if (fl.l_type == F_WRLCK)
2807 cfp->cl_flags = NFSLCK_WRITE;
2808 else
2809 cfp->cl_flags = NFSLCK_READ;
2810 sprintf(cfp->cl_owner, "LOCALID%d", fl.l_pid);
2811 cfp->cl_ownerlen = strlen(cfp->cl_owner);
2812 return (NFSERR_DENIED);
2813 }
2814 return (NFSERR_INVAL);
2815 }
2816
2817 /*
2818 * Do a local VOP_ADVLOCK().
2819 */
2820 int
2821 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first,
2822 u_int64_t end, struct thread *td)
2823 {
2824 int error;
2825 struct flock fl;
2826 u_int64_t tlen;
2827
2828 if (!nfsrv_dolocallocks)
2829 return (0);
2830 fl.l_whence = SEEK_SET;
2831 fl.l_type = ftype;
2832 fl.l_start = (off_t)first;
2833 if (end == NFS64BITSSET) {
2834 fl.l_len = 0;
2835 } else {
2836 tlen = end - first;
2837 fl.l_len = (off_t)tlen;
2838 }
2839 /*
2840 * For FreeBSD8, the l_pid and l_sysid must be set to the same
2841 * values for all calls, so that all locks will be held by the
2842 * nfsd server. (The nfsd server handles conflicts between the
2843 * various clients.)
2844 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024
2845 * bytes, so it can't be put in l_sysid.
2846 */
2847 if (nfsv4_sysid == 0)
2848 nfsv4_sysid = nlm_acquire_next_sysid();
2849 fl.l_pid = (pid_t)0;
2850 fl.l_sysid = (int)nfsv4_sysid;
2851
2852 NFSVOPUNLOCK(vp, 0, td);
2853 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl,
2854 (F_POSIX | F_REMOTE));
2855 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, td);
2856 return (error);
2857 }
2858
2859 /*
2860 * Unlock an underlying local file system.
2861 */
2862 void
2863 nfsvno_unlockvfs(struct mount *mp)
2864 {
2865
2866 VFS_UNLOCK_GIANT(mp);
2867 }
2868
2869 /*
2870 * Lock an underlying file system, as required, and return
2871 * whether or not it is locked.
2872 */
2873 int
2874 nfsvno_lockvfs(struct mount *mp)
2875 {
2876 int ret;
2877
2878 ret = VFS_LOCK_GIANT(mp);
2879 return (ret);
2880 }
2881
2882 /*
2883 * Check the nfsv4 root exports.
2884 */
2885 int
2886 nfsvno_v4rootexport(struct nfsrv_descript *nd)
2887 {
2888 struct ucred *credanon;
2889 int exflags, error, numsecflavor, *secflavors, i;
2890
2891 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags,
2892 &credanon, &numsecflavor, &secflavors);
2893 if (error)
2894 return (NFSERR_PROGUNAVAIL);
2895 if (credanon != NULL)
2896 crfree(credanon);
2897 for (i = 0; i < numsecflavor; i++) {
2898 if (secflavors[i] == AUTH_SYS)
2899 nd->nd_flag |= ND_EXAUTHSYS;
2900 else if (secflavors[i] == RPCSEC_GSS_KRB5)
2901 nd->nd_flag |= ND_EXGSS;
2902 else if (secflavors[i] == RPCSEC_GSS_KRB5I)
2903 nd->nd_flag |= ND_EXGSSINTEGRITY;
2904 else if (secflavors[i] == RPCSEC_GSS_KRB5P)
2905 nd->nd_flag |= ND_EXGSSPRIVACY;
2906 }
2907 return (0);
2908 }
2909
2910 /*
2911 * Nfs server psuedo system call for the nfsd's
2912 */
2913 /*
2914 * MPSAFE
2915 */
2916 static int
2917 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap)
2918 {
2919 struct file *fp;
2920 struct nfsd_addsock_args sockarg;
2921 struct nfsd_nfsd_args nfsdarg;
2922 int error;
2923
2924 if (uap->flag & NFSSVC_NFSDADDSOCK) {
2925 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg));
2926 if (error)
2927 return (error);
2928 if ((error = fget(td, sockarg.sock, &fp)) != 0) {
2929 return (error);
2930 }
2931 if (fp->f_type != DTYPE_SOCKET) {
2932 fdrop(fp, td);
2933 return (EPERM);
2934 }
2935 error = nfsrvd_addsock(fp);
2936 fdrop(fp, td);
2937 } else if (uap->flag & NFSSVC_NFSDNFSD) {
2938 if (uap->argp == NULL)
2939 return (EINVAL);
2940 error = copyin(uap->argp, (caddr_t)&nfsdarg,
2941 sizeof (nfsdarg));
2942 if (error)
2943 return (error);
2944 error = nfsrvd_nfsd(td, &nfsdarg);
2945 } else {
2946 error = nfssvc_srvcall(td, uap, td->td_ucred);
2947 }
2948 return (error);
2949 }
2950
2951 static int
2952 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
2953 {
2954 struct nfsex_args export;
2955 struct file *fp = NULL;
2956 int stablefd, len;
2957 struct nfsd_clid adminrevoke;
2958 struct nfsd_dumplist dumplist;
2959 struct nfsd_dumpclients *dumpclients;
2960 struct nfsd_dumplocklist dumplocklist;
2961 struct nfsd_dumplocks *dumplocks;
2962 struct nameidata nd;
2963 vnode_t vp;
2964 int error = EINVAL;
2965
2966 if (uap->flag & NFSSVC_PUBLICFH) {
2967 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data,
2968 sizeof (fhandle_t));
2969 error = copyin(uap->argp,
2970 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t));
2971 if (!error)
2972 nfs_pubfhset = 1;
2973 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) {
2974 error = copyin(uap->argp,(caddr_t)&export,
2975 sizeof (struct nfsex_args));
2976 if (!error)
2977 error = nfsrv_v4rootexport(&export, cred, p);
2978 } else if (uap->flag & NFSSVC_NOPUBLICFH) {
2979 nfs_pubfhset = 0;
2980 error = 0;
2981 } else if (uap->flag & NFSSVC_STABLERESTART) {
2982 error = copyin(uap->argp, (caddr_t)&stablefd,
2983 sizeof (int));
2984 if (!error)
2985 error = fp_getfvp(p, stablefd, &fp, &vp);
2986 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE))
2987 error = EBADF;
2988 if (!error && newnfs_numnfsd != 0)
2989 error = EPERM;
2990 if (!error) {
2991 nfsrv_stablefirst.nsf_fp = fp;
2992 nfsrv_setupstable(p);
2993 }
2994 } else if (uap->flag & NFSSVC_ADMINREVOKE) {
2995 error = copyin(uap->argp, (caddr_t)&adminrevoke,
2996 sizeof (struct nfsd_clid));
2997 if (!error)
2998 error = nfsrv_adminrevoke(&adminrevoke, p);
2999 } else if (uap->flag & NFSSVC_DUMPCLIENTS) {
3000 error = copyin(uap->argp, (caddr_t)&dumplist,
3001 sizeof (struct nfsd_dumplist));
3002 if (!error && (dumplist.ndl_size < 1 ||
3003 dumplist.ndl_size > NFSRV_MAXDUMPLIST))
3004 error = EPERM;
3005 if (!error) {
3006 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size;
3007 dumpclients = (struct nfsd_dumpclients *)malloc(len,
3008 M_TEMP, M_WAITOK);
3009 nfsrv_dumpclients(dumpclients, dumplist.ndl_size);
3010 error = copyout(dumpclients,
3011 CAST_USER_ADDR_T(dumplist.ndl_list), len);
3012 free((caddr_t)dumpclients, M_TEMP);
3013 }
3014 } else if (uap->flag & NFSSVC_DUMPLOCKS) {
3015 error = copyin(uap->argp, (caddr_t)&dumplocklist,
3016 sizeof (struct nfsd_dumplocklist));
3017 if (!error && (dumplocklist.ndllck_size < 1 ||
3018 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST))
3019 error = EPERM;
3020 if (!error)
3021 error = nfsrv_lookupfilename(&nd,
3022 dumplocklist.ndllck_fname, p);
3023 if (!error) {
3024 len = sizeof (struct nfsd_dumplocks) *
3025 dumplocklist.ndllck_size;
3026 dumplocks = (struct nfsd_dumplocks *)malloc(len,
3027 M_TEMP, M_WAITOK);
3028 nfsrv_dumplocks(nd.ni_vp, dumplocks,
3029 dumplocklist.ndllck_size, p);
3030 vput(nd.ni_vp);
3031 error = copyout(dumplocks,
3032 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len);
3033 free((caddr_t)dumplocks, M_TEMP);
3034 }
3035 }
3036 return (error);
3037 }
3038
3039 /*
3040 * Check exports.
3041 * Returns 0 if ok, 1 otherwise.
3042 */
3043 int
3044 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp)
3045 {
3046 int i;
3047
3048 /*
3049 * This seems odd, but allow the case where the security flavor
3050 * list is empty. This happens when NFSv4 is traversing non-exported
3051 * file systems. Exported file systems should always have a non-empty
3052 * security flavor list.
3053 */
3054 if (exp->nes_numsecflavor == 0)
3055 return (0);
3056
3057 for (i = 0; i < exp->nes_numsecflavor; i++) {
3058 /*
3059 * The tests for privacy and integrity must be first,
3060 * since ND_GSS is set for everything but AUTH_SYS.
3061 */
3062 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P &&
3063 (nd->nd_flag & ND_GSSPRIVACY))
3064 return (0);
3065 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I &&
3066 (nd->nd_flag & ND_GSSINTEGRITY))
3067 return (0);
3068 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 &&
3069 (nd->nd_flag & ND_GSS))
3070 return (0);
3071 if (exp->nes_secflavors[i] == AUTH_SYS &&
3072 (nd->nd_flag & ND_GSS) == 0)
3073 return (0);
3074 }
3075 return (1);
3076 }
3077
3078 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *);
3079
3080 /*
3081 * Called once to initialize data structures...
3082 */
3083 static int
3084 nfsd_modevent(module_t mod, int type, void *data)
3085 {
3086 int error = 0;
3087 static int loaded = 0;
3088
3089 switch (type) {
3090 case MOD_LOAD:
3091 if (loaded)
3092 return (0);
3093 newnfs_portinit();
3094 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF);
3095 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF);
3096 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL,
3097 MTX_DEF);
3098 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0);
3099 nfsrvd_initcache();
3100 nfsd_init();
3101 NFSD_LOCK();
3102 nfsrvd_init(0);
3103 NFSD_UNLOCK();
3104 nfsd_mntinit();
3105 #ifdef VV_DISABLEDELEG
3106 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation;
3107 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation;
3108 #endif
3109 nfsd_call_servertimer = nfsrv_servertimer;
3110 nfsd_call_nfsd = nfssvc_nfsd;
3111 loaded = 1;
3112 break;
3113
3114 case MOD_UNLOAD:
3115 if (newnfs_numnfsd != 0) {
3116 error = EBUSY;
3117 break;
3118 }
3119
3120 #ifdef VV_DISABLEDELEG
3121 vn_deleg_ops.vndeleg_recall = NULL;
3122 vn_deleg_ops.vndeleg_disable = NULL;
3123 #endif
3124 nfsd_call_servertimer = NULL;
3125 nfsd_call_nfsd = NULL;
3126 /* and get rid of the locks */
3127 mtx_destroy(&nfs_cache_mutex);
3128 mtx_destroy(&nfs_v4root_mutex);
3129 mtx_destroy(&nfsv4root_mnt.mnt_mtx);
3130 lockdestroy(&nfsv4root_mnt.mnt_explock);
3131 loaded = 0;
3132 break;
3133 default:
3134 error = EOPNOTSUPP;
3135 break;
3136 }
3137 return error;
3138 }
3139 static moduledata_t nfsd_mod = {
3140 "nfsd",
3141 nfsd_modevent,
3142 NULL,
3143 };
3144 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY);
3145
3146 /* So that loader and kldload(2) can find us, wherever we are.. */
3147 MODULE_VERSION(nfsd, 1);
3148 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1);
3149 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1);
3150
Cache object: 3e4c819e1c5faeb6b6eca0fa0524593e
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