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/9.0/sys/fs/nfsserver/nfs_nfsdport.c 225617 2011-09-16 13:58:51Z kmacy $");
36
37 #include <sys/capability.h>
38
39 /*
40 * Functions that perform the vfs operations required by the routines in
41 * nfsd_serv.c. It is hoped that this change will make the server more
42 * portable.
43 */
44
45 #include <fs/nfs/nfsport.h>
46 #include <sys/hash.h>
47 #include <sys/sysctl.h>
48 #include <nlm/nlm_prot.h>
49 #include <nlm/nlm.h>
50
51 FEATURE(nfsd, "NFSv4 server");
52
53 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
54 extern int nfsrv_useacl;
55 extern int newnfs_numnfsd;
56 extern struct mount nfsv4root_mnt;
57 extern struct nfsrv_stablefirst nfsrv_stablefirst;
58 extern void (*nfsd_call_servertimer)(void);
59 extern SVCPOOL *nfsrvd_pool;
60 struct vfsoptlist nfsv4root_opt, nfsv4root_newopt;
61 NFSDLOCKMUTEX;
62 struct mtx nfs_cache_mutex;
63 struct mtx nfs_v4root_mutex;
64 struct nfsrvfh nfs_rootfh, nfs_pubfh;
65 int nfs_pubfhset = 0, nfs_rootfhset = 0;
66 struct proc *nfsd_master_proc = NULL;
67 static pid_t nfsd_master_pid = (pid_t)-1;
68 static char nfsd_master_comm[MAXCOMLEN + 1];
69 static struct timeval nfsd_master_start;
70 static uint32_t nfsv4_sysid = 0;
71
72 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *,
73 struct ucred *);
74
75 int nfsrv_enable_crossmntpt = 1;
76 static int nfs_commit_blks;
77 static int nfs_commit_miss;
78 extern int nfsrv_issuedelegs;
79 extern int nfsrv_dolocallocks;
80
81 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server");
82 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW,
83 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points");
84 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks,
85 0, "");
86 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss,
87 0, "");
88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW,
89 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations");
90 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW,
91 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files");
92
93 #define NUM_HEURISTIC 1017
94 #define NHUSE_INIT 64
95 #define NHUSE_INC 16
96 #define NHUSE_MAX 2048
97
98 static struct nfsheur {
99 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */
100 off_t nh_nextr; /* next offset for sequential detection */
101 int nh_use; /* use count for selection */
102 int nh_seqcount; /* heuristic */
103 } nfsheur[NUM_HEURISTIC];
104
105
106 /*
107 * Get attributes into nfsvattr structure.
108 */
109 int
110 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
111 struct thread *p, int vpislocked)
112 {
113 int error, lockedit = 0;
114
115 if (vpislocked == 0) {
116 /*
117 * When vpislocked == 0, the vnode is either exclusively
118 * locked by this thread or not locked by this thread.
119 * As such, shared lock it, if not exclusively locked.
120 */
121 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) {
122 lockedit = 1;
123 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY);
124 }
125 }
126 error = VOP_GETATTR(vp, &nvap->na_vattr, cred);
127 if (lockedit != 0)
128 NFSVOPUNLOCK(vp, 0);
129
130 NFSEXITCODE(error);
131 return (error);
132 }
133
134 /*
135 * Get a file handle for a vnode.
136 */
137 int
138 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p)
139 {
140 int error;
141
142 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t));
143 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
144 error = VOP_VPTOFH(vp, &fhp->fh_fid);
145
146 NFSEXITCODE(error);
147 return (error);
148 }
149
150 /*
151 * Perform access checking for vnodes obtained from file handles that would
152 * refer to files already opened by a Unix client. You cannot just use
153 * vn_writechk() and VOP_ACCESSX() for two reasons.
154 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write
155 * case.
156 * 2 - The owner is to be given access irrespective of mode bits for some
157 * operations, so that processes that chmod after opening a file don't
158 * break.
159 */
160 int
161 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred,
162 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked,
163 u_int32_t *supportedtypep)
164 {
165 struct vattr vattr;
166 int error = 0, getret = 0;
167
168 if (vpislocked == 0) {
169 if (NFSVOPLOCK(vp, LK_SHARED) != 0) {
170 error = EPERM;
171 goto out;
172 }
173 }
174 if (accmode & VWRITE) {
175 /* Just vn_writechk() changed to check rdonly */
176 /*
177 * Disallow write attempts on read-only file systems;
178 * unless the file is a socket or a block or character
179 * device resident on the file system.
180 */
181 if (NFSVNO_EXRDONLY(exp) ||
182 (vp->v_mount->mnt_flag & MNT_RDONLY)) {
183 switch (vp->v_type) {
184 case VREG:
185 case VDIR:
186 case VLNK:
187 error = EROFS;
188 default:
189 break;
190 }
191 }
192 /*
193 * If there's shared text associated with
194 * the inode, try to free it up once. If
195 * we fail, we can't allow writing.
196 */
197 if ((vp->v_vflag & VV_TEXT) != 0 && error == 0)
198 error = ETXTBSY;
199 }
200 if (error != 0) {
201 if (vpislocked == 0)
202 NFSVOPUNLOCK(vp, 0);
203 goto out;
204 }
205
206 /*
207 * Should the override still be applied when ACLs are enabled?
208 */
209 error = VOP_ACCESSX(vp, accmode, cred, p);
210 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) {
211 /*
212 * Try again with VEXPLICIT_DENY, to see if the test for
213 * deletion is supported.
214 */
215 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p);
216 if (error == 0) {
217 if (vp->v_type == VDIR) {
218 accmode &= ~(VDELETE | VDELETE_CHILD);
219 accmode |= VWRITE;
220 error = VOP_ACCESSX(vp, accmode, cred, p);
221 } else if (supportedtypep != NULL) {
222 *supportedtypep &= ~NFSACCESS_DELETE;
223 }
224 }
225 }
226
227 /*
228 * Allow certain operations for the owner (reads and writes
229 * on files that are already open).
230 */
231 if (override != NFSACCCHK_NOOVERRIDE &&
232 (error == EPERM || error == EACCES)) {
233 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT))
234 error = 0;
235 else if (override & NFSACCCHK_ALLOWOWNER) {
236 getret = VOP_GETATTR(vp, &vattr, cred);
237 if (getret == 0 && cred->cr_uid == vattr.va_uid)
238 error = 0;
239 }
240 }
241 if (vpislocked == 0)
242 NFSVOPUNLOCK(vp, 0);
243
244 out:
245 NFSEXITCODE(error);
246 return (error);
247 }
248
249 /*
250 * Set attribute(s) vnop.
251 */
252 int
253 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
254 struct thread *p, struct nfsexstuff *exp)
255 {
256 int error;
257
258 error = VOP_SETATTR(vp, &nvap->na_vattr, cred);
259 NFSEXITCODE(error);
260 return (error);
261 }
262
263 /*
264 * Set up nameidata for a lookup() call and do it
265 * For the cases where we are crossing mount points
266 * (looking up the public fh path or the v4 root path when
267 * not using a pseudo-root fs), set/release the Giant lock,
268 * as required.
269 */
270 int
271 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp,
272 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p,
273 struct vnode **retdirp)
274 {
275 struct componentname *cnp = &ndp->ni_cnd;
276 int i;
277 struct iovec aiov;
278 struct uio auio;
279 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen;
280 int error = 0, crossmnt;
281 char *cp;
282
283 *retdirp = NULL;
284 cnp->cn_nameptr = cnp->cn_pnbuf;
285 ndp->ni_strictrelative = 0;
286 /*
287 * Extract and set starting directory.
288 */
289 if (dp->v_type != VDIR) {
290 if (islocked)
291 vput(dp);
292 else
293 vrele(dp);
294 nfsvno_relpathbuf(ndp);
295 error = ENOTDIR;
296 goto out1;
297 }
298 if (islocked)
299 NFSVOPUNLOCK(dp, 0);
300 VREF(dp);
301 *retdirp = dp;
302 if (NFSVNO_EXRDONLY(exp))
303 cnp->cn_flags |= RDONLY;
304 ndp->ni_segflg = UIO_SYSSPACE;
305 crossmnt = 1;
306
307 if (nd->nd_flag & ND_PUBLOOKUP) {
308 ndp->ni_loopcnt = 0;
309 if (cnp->cn_pnbuf[0] == '/') {
310 vrele(dp);
311 /*
312 * Check for degenerate pathnames here, since lookup()
313 * panics on them.
314 */
315 for (i = 1; i < ndp->ni_pathlen; i++)
316 if (cnp->cn_pnbuf[i] != '/')
317 break;
318 if (i == ndp->ni_pathlen) {
319 error = NFSERR_ACCES;
320 goto out;
321 }
322 dp = rootvnode;
323 VREF(dp);
324 }
325 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) ||
326 (nd->nd_flag & ND_NFSV4) == 0) {
327 /*
328 * Only cross mount points for NFSv4 when doing a
329 * mount while traversing the file system above
330 * the mount point, unless nfsrv_enable_crossmntpt is set.
331 */
332 cnp->cn_flags |= NOCROSSMOUNT;
333 crossmnt = 0;
334 }
335
336 /*
337 * Initialize for scan, set ni_startdir and bump ref on dp again
338 * becuase lookup() will dereference ni_startdir.
339 */
340
341 cnp->cn_thread = p;
342 ndp->ni_startdir = dp;
343 ndp->ni_rootdir = rootvnode;
344
345 if (!lockleaf)
346 cnp->cn_flags |= LOCKLEAF;
347 for (;;) {
348 cnp->cn_nameptr = cnp->cn_pnbuf;
349 /*
350 * Call lookup() to do the real work. If an error occurs,
351 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and
352 * we do not have to dereference anything before returning.
353 * In either case ni_startdir will be dereferenced and NULLed
354 * out.
355 */
356 error = lookup(ndp);
357 if (error)
358 break;
359
360 /*
361 * Check for encountering a symbolic link. Trivial
362 * termination occurs if no symlink encountered.
363 */
364 if ((cnp->cn_flags & ISSYMLINK) == 0) {
365 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0)
366 nfsvno_relpathbuf(ndp);
367 if (ndp->ni_vp && !lockleaf)
368 NFSVOPUNLOCK(ndp->ni_vp, 0);
369 break;
370 }
371
372 /*
373 * Validate symlink
374 */
375 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
376 NFSVOPUNLOCK(ndp->ni_dvp, 0);
377 if (!(nd->nd_flag & ND_PUBLOOKUP)) {
378 error = EINVAL;
379 goto badlink2;
380 }
381
382 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
383 error = ELOOP;
384 goto badlink2;
385 }
386 if (ndp->ni_pathlen > 1)
387 cp = uma_zalloc(namei_zone, M_WAITOK);
388 else
389 cp = cnp->cn_pnbuf;
390 aiov.iov_base = cp;
391 aiov.iov_len = MAXPATHLEN;
392 auio.uio_iov = &aiov;
393 auio.uio_iovcnt = 1;
394 auio.uio_offset = 0;
395 auio.uio_rw = UIO_READ;
396 auio.uio_segflg = UIO_SYSSPACE;
397 auio.uio_td = NULL;
398 auio.uio_resid = MAXPATHLEN;
399 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
400 if (error) {
401 badlink1:
402 if (ndp->ni_pathlen > 1)
403 uma_zfree(namei_zone, cp);
404 badlink2:
405 vrele(ndp->ni_dvp);
406 vput(ndp->ni_vp);
407 break;
408 }
409 linklen = MAXPATHLEN - auio.uio_resid;
410 if (linklen == 0) {
411 error = ENOENT;
412 goto badlink1;
413 }
414 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
415 error = ENAMETOOLONG;
416 goto badlink1;
417 }
418
419 /*
420 * Adjust or replace path
421 */
422 if (ndp->ni_pathlen > 1) {
423 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
424 uma_zfree(namei_zone, cnp->cn_pnbuf);
425 cnp->cn_pnbuf = cp;
426 } else
427 cnp->cn_pnbuf[linklen] = '\0';
428 ndp->ni_pathlen += linklen;
429
430 /*
431 * Cleanup refs for next loop and check if root directory
432 * should replace current directory. Normally ni_dvp
433 * becomes the new base directory and is cleaned up when
434 * we loop. Explicitly null pointers after invalidation
435 * to clarify operation.
436 */
437 vput(ndp->ni_vp);
438 ndp->ni_vp = NULL;
439
440 if (cnp->cn_pnbuf[0] == '/') {
441 vrele(ndp->ni_dvp);
442 ndp->ni_dvp = ndp->ni_rootdir;
443 VREF(ndp->ni_dvp);
444 }
445 ndp->ni_startdir = ndp->ni_dvp;
446 ndp->ni_dvp = NULL;
447 }
448 if (!lockleaf)
449 cnp->cn_flags &= ~LOCKLEAF;
450
451 out:
452 if (error) {
453 uma_zfree(namei_zone, cnp->cn_pnbuf);
454 ndp->ni_vp = NULL;
455 ndp->ni_dvp = NULL;
456 ndp->ni_startdir = NULL;
457 cnp->cn_flags &= ~HASBUF;
458 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) {
459 ndp->ni_dvp = NULL;
460 }
461
462 out1:
463 NFSEXITCODE2(error, nd);
464 return (error);
465 }
466
467 /*
468 * Set up a pathname buffer and return a pointer to it and, optionally
469 * set a hash pointer.
470 */
471 void
472 nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp)
473 {
474 struct componentname *cnp = &ndp->ni_cnd;
475
476 cnp->cn_flags |= (NOMACCHECK | HASBUF);
477 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK);
478 if (hashpp != NULL)
479 *hashpp = NULL;
480 *bufpp = cnp->cn_pnbuf;
481 }
482
483 /*
484 * Release the above path buffer, if not released by nfsvno_namei().
485 */
486 void
487 nfsvno_relpathbuf(struct nameidata *ndp)
488 {
489
490 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0)
491 panic("nfsrelpath");
492 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf);
493 ndp->ni_cnd.cn_flags &= ~HASBUF;
494 }
495
496 /*
497 * Readlink vnode op into an mbuf list.
498 */
499 int
500 nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p,
501 struct mbuf **mpp, struct mbuf **mpendp, int *lenp)
502 {
503 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
504 struct iovec *ivp = iv;
505 struct uio io, *uiop = &io;
506 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL;
507 int i, len, tlen, error = 0;
508
509 len = 0;
510 i = 0;
511 while (len < NFS_MAXPATHLEN) {
512 NFSMGET(mp);
513 MCLGET(mp, M_WAIT);
514 mp->m_len = NFSMSIZ(mp);
515 if (len == 0) {
516 mp3 = mp2 = mp;
517 } else {
518 mp2->m_next = mp;
519 mp2 = mp;
520 }
521 if ((len + mp->m_len) > NFS_MAXPATHLEN) {
522 mp->m_len = NFS_MAXPATHLEN - len;
523 len = NFS_MAXPATHLEN;
524 } else {
525 len += mp->m_len;
526 }
527 ivp->iov_base = mtod(mp, caddr_t);
528 ivp->iov_len = mp->m_len;
529 i++;
530 ivp++;
531 }
532 uiop->uio_iov = iv;
533 uiop->uio_iovcnt = i;
534 uiop->uio_offset = 0;
535 uiop->uio_resid = len;
536 uiop->uio_rw = UIO_READ;
537 uiop->uio_segflg = UIO_SYSSPACE;
538 uiop->uio_td = NULL;
539 error = VOP_READLINK(vp, uiop, cred);
540 if (error) {
541 m_freem(mp3);
542 *lenp = 0;
543 goto out;
544 }
545 if (uiop->uio_resid > 0) {
546 len -= uiop->uio_resid;
547 tlen = NFSM_RNDUP(len);
548 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len);
549 }
550 *lenp = len;
551 *mpp = mp3;
552 *mpendp = mp;
553
554 out:
555 NFSEXITCODE(error);
556 return (error);
557 }
558
559 /*
560 * Read vnode op call into mbuf list.
561 */
562 int
563 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred,
564 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp)
565 {
566 struct mbuf *m;
567 int i;
568 struct iovec *iv;
569 struct iovec *iv2;
570 int error = 0, len, left, siz, tlen, ioflag = 0, hi, try = 32;
571 struct mbuf *m2 = NULL, *m3;
572 struct uio io, *uiop = &io;
573 struct nfsheur *nh;
574
575 /*
576 * Calculate seqcount for heuristic
577 */
578 /*
579 * Locate best candidate
580 */
581
582 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC;
583 nh = &nfsheur[hi];
584
585 while (try--) {
586 if (nfsheur[hi].nh_vp == vp) {
587 nh = &nfsheur[hi];
588 break;
589 }
590 if (nfsheur[hi].nh_use > 0)
591 --nfsheur[hi].nh_use;
592 hi = (hi + 1) % NUM_HEURISTIC;
593 if (nfsheur[hi].nh_use < nh->nh_use)
594 nh = &nfsheur[hi];
595 }
596
597 if (nh->nh_vp != vp) {
598 nh->nh_vp = vp;
599 nh->nh_nextr = off;
600 nh->nh_use = NHUSE_INIT;
601 if (off == 0)
602 nh->nh_seqcount = 4;
603 else
604 nh->nh_seqcount = 1;
605 }
606
607 /*
608 * Calculate heuristic
609 */
610
611 if ((off == 0 && nh->nh_seqcount > 0) || off == nh->nh_nextr) {
612 if (++nh->nh_seqcount > IO_SEQMAX)
613 nh->nh_seqcount = IO_SEQMAX;
614 } else if (nh->nh_seqcount > 1) {
615 nh->nh_seqcount = 1;
616 } else {
617 nh->nh_seqcount = 0;
618 }
619 nh->nh_use += NHUSE_INC;
620 if (nh->nh_use > NHUSE_MAX)
621 nh->nh_use = NHUSE_MAX;
622 ioflag |= nh->nh_seqcount << IO_SEQSHIFT;
623
624 len = left = NFSM_RNDUP(cnt);
625 m3 = NULL;
626 /*
627 * Generate the mbuf list with the uio_iov ref. to it.
628 */
629 i = 0;
630 while (left > 0) {
631 NFSMGET(m);
632 MCLGET(m, M_WAIT);
633 m->m_len = 0;
634 siz = min(M_TRAILINGSPACE(m), left);
635 left -= siz;
636 i++;
637 if (m3)
638 m2->m_next = m;
639 else
640 m3 = m;
641 m2 = m;
642 }
643 MALLOC(iv, struct iovec *, i * sizeof (struct iovec),
644 M_TEMP, M_WAITOK);
645 uiop->uio_iov = iv2 = iv;
646 m = m3;
647 left = len;
648 i = 0;
649 while (left > 0) {
650 if (m == NULL)
651 panic("nfsvno_read iov");
652 siz = min(M_TRAILINGSPACE(m), left);
653 if (siz > 0) {
654 iv->iov_base = mtod(m, caddr_t) + m->m_len;
655 iv->iov_len = siz;
656 m->m_len += siz;
657 left -= siz;
658 iv++;
659 i++;
660 }
661 m = m->m_next;
662 }
663 uiop->uio_iovcnt = i;
664 uiop->uio_offset = off;
665 uiop->uio_resid = len;
666 uiop->uio_rw = UIO_READ;
667 uiop->uio_segflg = UIO_SYSSPACE;
668 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred);
669 FREE((caddr_t)iv2, M_TEMP);
670 if (error) {
671 m_freem(m3);
672 *mpp = NULL;
673 goto out;
674 }
675 tlen = len - uiop->uio_resid;
676 cnt = cnt < tlen ? cnt : tlen;
677 tlen = NFSM_RNDUP(cnt);
678 if (tlen == 0) {
679 m_freem(m3);
680 m3 = NULL;
681 } else if (len != tlen || tlen != cnt)
682 nfsrv_adj(m3, len - tlen, tlen - cnt);
683 *mpp = m3;
684 *mpendp = m2;
685
686 out:
687 NFSEXITCODE(error);
688 return (error);
689 }
690
691 /*
692 * Write vnode op from an mbuf list.
693 */
694 int
695 nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable,
696 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p)
697 {
698 struct iovec *ivp;
699 int i, len;
700 struct iovec *iv;
701 int ioflags, error;
702 struct uio io, *uiop = &io;
703
704 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP,
705 M_WAITOK);
706 uiop->uio_iov = iv = ivp;
707 uiop->uio_iovcnt = cnt;
708 i = mtod(mp, caddr_t) + mp->m_len - cp;
709 len = retlen;
710 while (len > 0) {
711 if (mp == NULL)
712 panic("nfsvno_write");
713 if (i > 0) {
714 i = min(i, len);
715 ivp->iov_base = cp;
716 ivp->iov_len = i;
717 ivp++;
718 len -= i;
719 }
720 mp = mp->m_next;
721 if (mp) {
722 i = mp->m_len;
723 cp = mtod(mp, caddr_t);
724 }
725 }
726
727 if (stable == NFSWRITE_UNSTABLE)
728 ioflags = IO_NODELOCKED;
729 else
730 ioflags = (IO_SYNC | IO_NODELOCKED);
731 uiop->uio_resid = retlen;
732 uiop->uio_rw = UIO_WRITE;
733 uiop->uio_segflg = UIO_SYSSPACE;
734 NFSUIOPROC(uiop, p);
735 uiop->uio_offset = off;
736 error = VOP_WRITE(vp, uiop, ioflags, cred);
737 FREE((caddr_t)iv, M_TEMP);
738
739 NFSEXITCODE(error);
740 return (error);
741 }
742
743 /*
744 * Common code for creating a regular file (plus special files for V2).
745 */
746 int
747 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp,
748 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp,
749 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp)
750 {
751 u_quad_t tempsize;
752 int error;
753
754 error = nd->nd_repstat;
755 if (!error && ndp->ni_vp == NULL) {
756 if (nvap->na_type == VREG || nvap->na_type == VSOCK) {
757 vrele(ndp->ni_startdir);
758 error = VOP_CREATE(ndp->ni_dvp,
759 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
760 vput(ndp->ni_dvp);
761 nfsvno_relpathbuf(ndp);
762 if (!error) {
763 if (*exclusive_flagp) {
764 *exclusive_flagp = 0;
765 NFSVNO_ATTRINIT(nvap);
766 nvap->na_atime.tv_sec = cverf[0];
767 nvap->na_atime.tv_nsec = cverf[1];
768 error = VOP_SETATTR(ndp->ni_vp,
769 &nvap->na_vattr, nd->nd_cred);
770 }
771 }
772 /*
773 * NFS V2 Only. nfsrvd_mknod() does this for V3.
774 * (This implies, just get out on an error.)
775 */
776 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK ||
777 nvap->na_type == VFIFO) {
778 if (nvap->na_type == VCHR && rdev == 0xffffffff)
779 nvap->na_type = VFIFO;
780 if (nvap->na_type != VFIFO &&
781 (error = priv_check_cred(nd->nd_cred,
782 PRIV_VFS_MKNOD_DEV, 0))) {
783 vrele(ndp->ni_startdir);
784 nfsvno_relpathbuf(ndp);
785 vput(ndp->ni_dvp);
786 goto out;
787 }
788 nvap->na_rdev = rdev;
789 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
790 &ndp->ni_cnd, &nvap->na_vattr);
791 vput(ndp->ni_dvp);
792 nfsvno_relpathbuf(ndp);
793 vrele(ndp->ni_startdir);
794 if (error)
795 goto out;
796 } else {
797 vrele(ndp->ni_startdir);
798 nfsvno_relpathbuf(ndp);
799 vput(ndp->ni_dvp);
800 error = ENXIO;
801 goto out;
802 }
803 *vpp = ndp->ni_vp;
804 } else {
805 /*
806 * Handle cases where error is already set and/or
807 * the file exists.
808 * 1 - clean up the lookup
809 * 2 - iff !error and na_size set, truncate it
810 */
811 vrele(ndp->ni_startdir);
812 nfsvno_relpathbuf(ndp);
813 *vpp = ndp->ni_vp;
814 if (ndp->ni_dvp == *vpp)
815 vrele(ndp->ni_dvp);
816 else
817 vput(ndp->ni_dvp);
818 if (!error && nvap->na_size != VNOVAL) {
819 error = nfsvno_accchk(*vpp, VWRITE,
820 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
821 NFSACCCHK_VPISLOCKED, NULL);
822 if (!error) {
823 tempsize = nvap->na_size;
824 NFSVNO_ATTRINIT(nvap);
825 nvap->na_size = tempsize;
826 error = VOP_SETATTR(*vpp,
827 &nvap->na_vattr, nd->nd_cred);
828 }
829 }
830 if (error)
831 vput(*vpp);
832 }
833
834 out:
835 NFSEXITCODE(error);
836 return (error);
837 }
838
839 /*
840 * Do a mknod vnode op.
841 */
842 int
843 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred,
844 struct thread *p)
845 {
846 int error = 0;
847 enum vtype vtyp;
848
849 vtyp = nvap->na_type;
850 /*
851 * Iff doesn't exist, create it.
852 */
853 if (ndp->ni_vp) {
854 vrele(ndp->ni_startdir);
855 nfsvno_relpathbuf(ndp);
856 vput(ndp->ni_dvp);
857 vrele(ndp->ni_vp);
858 error = EEXIST;
859 goto out;
860 }
861 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
862 vrele(ndp->ni_startdir);
863 nfsvno_relpathbuf(ndp);
864 vput(ndp->ni_dvp);
865 error = NFSERR_BADTYPE;
866 goto out;
867 }
868 if (vtyp == VSOCK) {
869 vrele(ndp->ni_startdir);
870 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp,
871 &ndp->ni_cnd, &nvap->na_vattr);
872 vput(ndp->ni_dvp);
873 nfsvno_relpathbuf(ndp);
874 } else {
875 if (nvap->na_type != VFIFO &&
876 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) {
877 vrele(ndp->ni_startdir);
878 nfsvno_relpathbuf(ndp);
879 vput(ndp->ni_dvp);
880 goto out;
881 }
882 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
883 &ndp->ni_cnd, &nvap->na_vattr);
884 vput(ndp->ni_dvp);
885 nfsvno_relpathbuf(ndp);
886 vrele(ndp->ni_startdir);
887 /*
888 * Since VOP_MKNOD returns the ni_vp, I can't
889 * see any reason to do the lookup.
890 */
891 }
892
893 out:
894 NFSEXITCODE(error);
895 return (error);
896 }
897
898 /*
899 * Mkdir vnode op.
900 */
901 int
902 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid,
903 struct ucred *cred, struct thread *p, struct nfsexstuff *exp)
904 {
905 int error = 0;
906
907 if (ndp->ni_vp != NULL) {
908 if (ndp->ni_dvp == ndp->ni_vp)
909 vrele(ndp->ni_dvp);
910 else
911 vput(ndp->ni_dvp);
912 vrele(ndp->ni_vp);
913 nfsvno_relpathbuf(ndp);
914 error = EEXIST;
915 goto out;
916 }
917 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
918 &nvap->na_vattr);
919 vput(ndp->ni_dvp);
920 nfsvno_relpathbuf(ndp);
921
922 out:
923 NFSEXITCODE(error);
924 return (error);
925 }
926
927 /*
928 * symlink vnode op.
929 */
930 int
931 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp,
932 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p,
933 struct nfsexstuff *exp)
934 {
935 int error = 0;
936
937 if (ndp->ni_vp) {
938 vrele(ndp->ni_startdir);
939 nfsvno_relpathbuf(ndp);
940 if (ndp->ni_dvp == ndp->ni_vp)
941 vrele(ndp->ni_dvp);
942 else
943 vput(ndp->ni_dvp);
944 vrele(ndp->ni_vp);
945 error = EEXIST;
946 goto out;
947 }
948
949 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
950 &nvap->na_vattr, pathcp);
951 vput(ndp->ni_dvp);
952 vrele(ndp->ni_startdir);
953 nfsvno_relpathbuf(ndp);
954 /*
955 * Although FreeBSD still had the lookup code in
956 * it for 7/current, there doesn't seem to be any
957 * point, since VOP_SYMLINK() returns the ni_vp.
958 * Just vput it for v2.
959 */
960 if (!not_v2 && !error)
961 vput(ndp->ni_vp);
962
963 out:
964 NFSEXITCODE(error);
965 return (error);
966 }
967
968 /*
969 * Parse symbolic link arguments.
970 * This function has an ugly side effect. It will MALLOC() an area for
971 * the symlink and set iov_base to point to it, only if it succeeds.
972 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must
973 * be FREE'd later.
974 */
975 int
976 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap,
977 struct thread *p, char **pathcpp, int *lenp)
978 {
979 u_int32_t *tl;
980 char *pathcp = NULL;
981 int error = 0, len;
982 struct nfsv2_sattr *sp;
983
984 *pathcpp = NULL;
985 *lenp = 0;
986 if ((nd->nd_flag & ND_NFSV3) &&
987 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p)))
988 goto nfsmout;
989 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
990 len = fxdr_unsigned(int, *tl);
991 if (len > NFS_MAXPATHLEN || len <= 0) {
992 error = EBADRPC;
993 goto nfsmout;
994 }
995 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK);
996 error = nfsrv_mtostr(nd, pathcp, len);
997 if (error)
998 goto nfsmout;
999 if (nd->nd_flag & ND_NFSV2) {
1000 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1001 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode);
1002 }
1003 *pathcpp = pathcp;
1004 *lenp = len;
1005 NFSEXITCODE2(0, nd);
1006 return (0);
1007 nfsmout:
1008 if (pathcp)
1009 free(pathcp, M_TEMP);
1010 NFSEXITCODE2(error, nd);
1011 return (error);
1012 }
1013
1014 /*
1015 * Remove a non-directory object.
1016 */
1017 int
1018 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred,
1019 struct thread *p, struct nfsexstuff *exp)
1020 {
1021 struct vnode *vp;
1022 int error = 0;
1023
1024 vp = ndp->ni_vp;
1025 if (vp->v_type == VDIR)
1026 error = NFSERR_ISDIR;
1027 else if (is_v4)
1028 error = nfsrv_checkremove(vp, 1, p);
1029 if (!error)
1030 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd);
1031 if (ndp->ni_dvp == vp)
1032 vrele(ndp->ni_dvp);
1033 else
1034 vput(ndp->ni_dvp);
1035 vput(vp);
1036 NFSEXITCODE(error);
1037 return (error);
1038 }
1039
1040 /*
1041 * Remove a directory.
1042 */
1043 int
1044 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred,
1045 struct thread *p, struct nfsexstuff *exp)
1046 {
1047 struct vnode *vp;
1048 int error = 0;
1049
1050 vp = ndp->ni_vp;
1051 if (vp->v_type != VDIR) {
1052 error = ENOTDIR;
1053 goto out;
1054 }
1055 /*
1056 * No rmdir "." please.
1057 */
1058 if (ndp->ni_dvp == vp) {
1059 error = EINVAL;
1060 goto out;
1061 }
1062 /*
1063 * The root of a mounted filesystem cannot be deleted.
1064 */
1065 if (vp->v_vflag & VV_ROOT)
1066 error = EBUSY;
1067 out:
1068 if (!error)
1069 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd);
1070 if (ndp->ni_dvp == vp)
1071 vrele(ndp->ni_dvp);
1072 else
1073 vput(ndp->ni_dvp);
1074 vput(vp);
1075 NFSEXITCODE(error);
1076 return (error);
1077 }
1078
1079 /*
1080 * Rename vnode op.
1081 */
1082 int
1083 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp,
1084 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p)
1085 {
1086 struct vnode *fvp, *tvp, *tdvp;
1087 int error = 0;
1088
1089 fvp = fromndp->ni_vp;
1090 if (ndstat) {
1091 vrele(fromndp->ni_dvp);
1092 vrele(fvp);
1093 error = ndstat;
1094 goto out1;
1095 }
1096 tdvp = tondp->ni_dvp;
1097 tvp = tondp->ni_vp;
1098 if (tvp != NULL) {
1099 if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
1100 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST;
1101 goto out;
1102 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
1103 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST;
1104 goto out;
1105 }
1106 if (tvp->v_type == VDIR && tvp->v_mountedhere) {
1107 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1108 goto out;
1109 }
1110
1111 /*
1112 * A rename to '.' or '..' results in a prematurely
1113 * unlocked vnode on FreeBSD5, so I'm just going to fail that
1114 * here.
1115 */
1116 if ((tondp->ni_cnd.cn_namelen == 1 &&
1117 tondp->ni_cnd.cn_nameptr[0] == '.') ||
1118 (tondp->ni_cnd.cn_namelen == 2 &&
1119 tondp->ni_cnd.cn_nameptr[0] == '.' &&
1120 tondp->ni_cnd.cn_nameptr[1] == '.')) {
1121 error = EINVAL;
1122 goto out;
1123 }
1124 }
1125 if (fvp->v_type == VDIR && fvp->v_mountedhere) {
1126 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1127 goto out;
1128 }
1129 if (fvp->v_mount != tdvp->v_mount) {
1130 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1131 goto out;
1132 }
1133 if (fvp == tdvp) {
1134 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL;
1135 goto out;
1136 }
1137 if (fvp == tvp) {
1138 /*
1139 * If source and destination are the same, there is nothing to
1140 * do. Set error to -1 to indicate this.
1141 */
1142 error = -1;
1143 goto out;
1144 }
1145 if (ndflag & ND_NFSV4) {
1146 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) {
1147 error = nfsrv_checkremove(fvp, 0, p);
1148 NFSVOPUNLOCK(fvp, 0);
1149 } else
1150 error = EPERM;
1151 if (tvp && !error)
1152 error = nfsrv_checkremove(tvp, 1, p);
1153 } else {
1154 /*
1155 * For NFSv2 and NFSv3, try to get rid of the delegation, so
1156 * that the NFSv4 client won't be confused by the rename.
1157 * Since nfsd_recalldelegation() can only be called on an
1158 * unlocked vnode at this point and fvp is the file that will
1159 * still exist after the rename, just do fvp.
1160 */
1161 nfsd_recalldelegation(fvp, p);
1162 }
1163 out:
1164 if (!error) {
1165 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp,
1166 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp,
1167 &tondp->ni_cnd);
1168 } else {
1169 if (tdvp == tvp)
1170 vrele(tdvp);
1171 else
1172 vput(tdvp);
1173 if (tvp)
1174 vput(tvp);
1175 vrele(fromndp->ni_dvp);
1176 vrele(fvp);
1177 if (error == -1)
1178 error = 0;
1179 }
1180 vrele(tondp->ni_startdir);
1181 nfsvno_relpathbuf(tondp);
1182 out1:
1183 vrele(fromndp->ni_startdir);
1184 nfsvno_relpathbuf(fromndp);
1185 NFSEXITCODE(error);
1186 return (error);
1187 }
1188
1189 /*
1190 * Link vnode op.
1191 */
1192 int
1193 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred,
1194 struct thread *p, struct nfsexstuff *exp)
1195 {
1196 struct vnode *xp;
1197 int error = 0;
1198
1199 xp = ndp->ni_vp;
1200 if (xp != NULL) {
1201 error = EEXIST;
1202 } else {
1203 xp = ndp->ni_dvp;
1204 if (vp->v_mount != xp->v_mount)
1205 error = EXDEV;
1206 }
1207 if (!error) {
1208 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
1209 if ((vp->v_iflag & VI_DOOMED) == 0)
1210 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd);
1211 else
1212 error = EPERM;
1213 if (ndp->ni_dvp == vp)
1214 vrele(ndp->ni_dvp);
1215 else
1216 vput(ndp->ni_dvp);
1217 NFSVOPUNLOCK(vp, 0);
1218 } else {
1219 if (ndp->ni_dvp == ndp->ni_vp)
1220 vrele(ndp->ni_dvp);
1221 else
1222 vput(ndp->ni_dvp);
1223 if (ndp->ni_vp)
1224 vrele(ndp->ni_vp);
1225 }
1226 nfsvno_relpathbuf(ndp);
1227 NFSEXITCODE(error);
1228 return (error);
1229 }
1230
1231 /*
1232 * Do the fsync() appropriate for the commit.
1233 */
1234 int
1235 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred,
1236 struct thread *td)
1237 {
1238 int error = 0;
1239
1240 if (cnt > MAX_COMMIT_COUNT) {
1241 /*
1242 * Give up and do the whole thing
1243 */
1244 if (vp->v_object &&
1245 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
1246 VM_OBJECT_LOCK(vp->v_object);
1247 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC);
1248 VM_OBJECT_UNLOCK(vp->v_object);
1249 }
1250 error = VOP_FSYNC(vp, MNT_WAIT, td);
1251 } else {
1252 /*
1253 * Locate and synchronously write any buffers that fall
1254 * into the requested range. Note: we are assuming that
1255 * f_iosize is a power of 2.
1256 */
1257 int iosize = vp->v_mount->mnt_stat.f_iosize;
1258 int iomask = iosize - 1;
1259 struct bufobj *bo;
1260 daddr_t lblkno;
1261
1262 /*
1263 * Align to iosize boundry, super-align to page boundry.
1264 */
1265 if (off & iomask) {
1266 cnt += off & iomask;
1267 off &= ~(u_quad_t)iomask;
1268 }
1269 if (off & PAGE_MASK) {
1270 cnt += off & PAGE_MASK;
1271 off &= ~(u_quad_t)PAGE_MASK;
1272 }
1273 lblkno = off / iosize;
1274
1275 if (vp->v_object &&
1276 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
1277 VM_OBJECT_LOCK(vp->v_object);
1278 vm_object_page_clean(vp->v_object, off, off + cnt,
1279 OBJPC_SYNC);
1280 VM_OBJECT_UNLOCK(vp->v_object);
1281 }
1282
1283 bo = &vp->v_bufobj;
1284 BO_LOCK(bo);
1285 while (cnt > 0) {
1286 struct buf *bp;
1287
1288 /*
1289 * If we have a buffer and it is marked B_DELWRI we
1290 * have to lock and write it. Otherwise the prior
1291 * write is assumed to have already been committed.
1292 *
1293 * gbincore() can return invalid buffers now so we
1294 * have to check that bit as well (though B_DELWRI
1295 * should not be set if B_INVAL is set there could be
1296 * a race here since we haven't locked the buffer).
1297 */
1298 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) {
1299 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL |
1300 LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) {
1301 BO_LOCK(bo);
1302 continue; /* retry */
1303 }
1304 if ((bp->b_flags & (B_DELWRI|B_INVAL)) ==
1305 B_DELWRI) {
1306 bremfree(bp);
1307 bp->b_flags &= ~B_ASYNC;
1308 bwrite(bp);
1309 ++nfs_commit_miss;
1310 } else
1311 BUF_UNLOCK(bp);
1312 BO_LOCK(bo);
1313 }
1314 ++nfs_commit_blks;
1315 if (cnt < iosize)
1316 break;
1317 cnt -= iosize;
1318 ++lblkno;
1319 }
1320 BO_UNLOCK(bo);
1321 }
1322 NFSEXITCODE(error);
1323 return (error);
1324 }
1325
1326 /*
1327 * Statfs vnode op.
1328 */
1329 int
1330 nfsvno_statfs(struct vnode *vp, struct statfs *sf)
1331 {
1332 int error;
1333
1334 error = VFS_STATFS(vp->v_mount, sf);
1335 if (error == 0) {
1336 /*
1337 * Since NFS handles these values as unsigned on the
1338 * wire, there is no way to represent negative values,
1339 * so set them to 0. Without this, they will appear
1340 * to be very large positive values for clients like
1341 * Solaris10.
1342 */
1343 if (sf->f_bavail < 0)
1344 sf->f_bavail = 0;
1345 if (sf->f_ffree < 0)
1346 sf->f_ffree = 0;
1347 }
1348 NFSEXITCODE(error);
1349 return (error);
1350 }
1351
1352 /*
1353 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but
1354 * must handle nfsrv_opencheck() calls after any other access checks.
1355 */
1356 void
1357 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp,
1358 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp,
1359 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create,
1360 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p,
1361 struct nfsexstuff *exp, struct vnode **vpp)
1362 {
1363 struct vnode *vp = NULL;
1364 u_quad_t tempsize;
1365 struct nfsexstuff nes;
1366
1367 if (ndp->ni_vp == NULL)
1368 nd->nd_repstat = nfsrv_opencheck(clientid,
1369 stateidp, stp, NULL, nd, p, nd->nd_repstat);
1370 if (!nd->nd_repstat) {
1371 if (ndp->ni_vp == NULL) {
1372 vrele(ndp->ni_startdir);
1373 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp,
1374 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
1375 vput(ndp->ni_dvp);
1376 nfsvno_relpathbuf(ndp);
1377 if (!nd->nd_repstat) {
1378 if (*exclusive_flagp) {
1379 *exclusive_flagp = 0;
1380 NFSVNO_ATTRINIT(nvap);
1381 nvap->na_atime.tv_sec = cverf[0];
1382 nvap->na_atime.tv_nsec = cverf[1];
1383 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp,
1384 &nvap->na_vattr, cred);
1385 } else {
1386 nfsrv_fixattr(nd, ndp->ni_vp, nvap,
1387 aclp, p, attrbitp, exp);
1388 }
1389 }
1390 vp = ndp->ni_vp;
1391 } else {
1392 if (ndp->ni_startdir)
1393 vrele(ndp->ni_startdir);
1394 nfsvno_relpathbuf(ndp);
1395 vp = ndp->ni_vp;
1396 if (create == NFSV4OPEN_CREATE) {
1397 if (ndp->ni_dvp == vp)
1398 vrele(ndp->ni_dvp);
1399 else
1400 vput(ndp->ni_dvp);
1401 }
1402 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) {
1403 if (ndp->ni_cnd.cn_flags & RDONLY)
1404 NFSVNO_SETEXRDONLY(&nes);
1405 else
1406 NFSVNO_EXINIT(&nes);
1407 nd->nd_repstat = nfsvno_accchk(vp,
1408 VWRITE, cred, &nes, p,
1409 NFSACCCHK_NOOVERRIDE,
1410 NFSACCCHK_VPISLOCKED, NULL);
1411 nd->nd_repstat = nfsrv_opencheck(clientid,
1412 stateidp, stp, vp, nd, p, nd->nd_repstat);
1413 if (!nd->nd_repstat) {
1414 tempsize = nvap->na_size;
1415 NFSVNO_ATTRINIT(nvap);
1416 nvap->na_size = tempsize;
1417 nd->nd_repstat = VOP_SETATTR(vp,
1418 &nvap->na_vattr, cred);
1419 }
1420 } else if (vp->v_type == VREG) {
1421 nd->nd_repstat = nfsrv_opencheck(clientid,
1422 stateidp, stp, vp, nd, p, nd->nd_repstat);
1423 }
1424 }
1425 } else {
1426 if (ndp->ni_cnd.cn_flags & HASBUF)
1427 nfsvno_relpathbuf(ndp);
1428 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) {
1429 vrele(ndp->ni_startdir);
1430 if (ndp->ni_dvp == ndp->ni_vp)
1431 vrele(ndp->ni_dvp);
1432 else
1433 vput(ndp->ni_dvp);
1434 if (ndp->ni_vp)
1435 vput(ndp->ni_vp);
1436 }
1437 }
1438 *vpp = vp;
1439
1440 NFSEXITCODE2(0, nd);
1441 }
1442
1443 /*
1444 * Updates the file rev and sets the mtime and ctime
1445 * to the current clock time, returning the va_filerev and va_Xtime
1446 * values.
1447 */
1448 void
1449 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap,
1450 struct ucred *cred, struct thread *p)
1451 {
1452 struct vattr va;
1453
1454 VATTR_NULL(&va);
1455 getnanotime(&va.va_mtime);
1456 (void) VOP_SETATTR(vp, &va, cred);
1457 (void) nfsvno_getattr(vp, nvap, cred, p, 1);
1458 }
1459
1460 /*
1461 * Glue routine to nfsv4_fillattr().
1462 */
1463 int
1464 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp,
1465 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp,
1466 struct ucred *cred, struct thread *p, int isdgram, int reterr,
1467 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno)
1468 {
1469 int error;
1470
1471 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror,
1472 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root,
1473 mounted_on_fileno);
1474 NFSEXITCODE2(0, nd);
1475 return (error);
1476 }
1477
1478 /* Since the Readdir vnode ops vary, put the entire functions in here. */
1479 /*
1480 * nfs readdir service
1481 * - mallocs what it thinks is enough to read
1482 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR
1483 * - calls VOP_READDIR()
1484 * - loops around building the reply
1485 * if the output generated exceeds count break out of loop
1486 * The NFSM_CLGET macro is used here so that the reply will be packed
1487 * tightly in mbuf clusters.
1488 * - it trims out records with d_fileno == 0
1489 * this doesn't matter for Unix clients, but they might confuse clients
1490 * for other os'.
1491 * - it trims out records with d_type == DT_WHT
1492 * these cannot be seen through NFS (unless we extend the protocol)
1493 * The alternate call nfsrvd_readdirplus() does lookups as well.
1494 * PS: The NFS protocol spec. does not clarify what the "count" byte
1495 * argument is a count of.. just name strings and file id's or the
1496 * entire reply rpc or ...
1497 * I tried just file name and id sizes and it confused the Sun client,
1498 * so I am using the full rpc size now. The "paranoia.." comment refers
1499 * to including the status longwords that are not a part of the dir.
1500 * "entry" structures, but are in the rpc.
1501 */
1502 int
1503 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram,
1504 struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
1505 {
1506 struct dirent *dp;
1507 u_int32_t *tl;
1508 int dirlen;
1509 char *cpos, *cend, *rbuf;
1510 struct nfsvattr at;
1511 int nlen, error = 0, getret = 1;
1512 int siz, cnt, fullsiz, eofflag, ncookies;
1513 u_int64_t off, toff, verf;
1514 u_long *cookies = NULL, *cookiep;
1515 struct uio io;
1516 struct iovec iv;
1517 int not_zfs;
1518
1519 if (nd->nd_repstat) {
1520 nfsrv_postopattr(nd, getret, &at);
1521 goto out;
1522 }
1523 if (nd->nd_flag & ND_NFSV2) {
1524 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1525 off = fxdr_unsigned(u_quad_t, *tl++);
1526 } else {
1527 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1528 off = fxdr_hyper(tl);
1529 tl += 2;
1530 verf = fxdr_hyper(tl);
1531 tl += 2;
1532 }
1533 toff = off;
1534 cnt = fxdr_unsigned(int, *tl);
1535 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0)
1536 cnt = NFS_SRVMAXDATA(nd);
1537 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
1538 fullsiz = siz;
1539 if (nd->nd_flag & ND_NFSV3) {
1540 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred,
1541 p, 1);
1542 #if 0
1543 /*
1544 * va_filerev is not sufficient as a cookie verifier,
1545 * since it is not supposed to change when entries are
1546 * removed/added unless that offset cookies returned to
1547 * the client are no longer valid.
1548 */
1549 if (!nd->nd_repstat && toff && verf != at.na_filerev)
1550 nd->nd_repstat = NFSERR_BAD_COOKIE;
1551 #endif
1552 }
1553 if (nd->nd_repstat == 0 && cnt == 0) {
1554 if (nd->nd_flag & ND_NFSV2)
1555 /* NFSv2 does not have NFSERR_TOOSMALL */
1556 nd->nd_repstat = EPERM;
1557 else
1558 nd->nd_repstat = NFSERR_TOOSMALL;
1559 }
1560 if (!nd->nd_repstat)
1561 nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
1562 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
1563 NFSACCCHK_VPISLOCKED, NULL);
1564 if (nd->nd_repstat) {
1565 vput(vp);
1566 if (nd->nd_flag & ND_NFSV3)
1567 nfsrv_postopattr(nd, getret, &at);
1568 goto out;
1569 }
1570 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs");
1571 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
1572 again:
1573 eofflag = 0;
1574 if (cookies) {
1575 free((caddr_t)cookies, M_TEMP);
1576 cookies = NULL;
1577 }
1578
1579 iv.iov_base = rbuf;
1580 iv.iov_len = siz;
1581 io.uio_iov = &iv;
1582 io.uio_iovcnt = 1;
1583 io.uio_offset = (off_t)off;
1584 io.uio_resid = siz;
1585 io.uio_segflg = UIO_SYSSPACE;
1586 io.uio_rw = UIO_READ;
1587 io.uio_td = NULL;
1588 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
1589 &cookies);
1590 off = (u_int64_t)io.uio_offset;
1591 if (io.uio_resid)
1592 siz -= io.uio_resid;
1593
1594 if (!cookies && !nd->nd_repstat)
1595 nd->nd_repstat = NFSERR_PERM;
1596 if (nd->nd_flag & ND_NFSV3) {
1597 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
1598 if (!nd->nd_repstat)
1599 nd->nd_repstat = getret;
1600 }
1601
1602 /*
1603 * Handles the failed cases. nd->nd_repstat == 0 past here.
1604 */
1605 if (nd->nd_repstat) {
1606 vput(vp);
1607 free((caddr_t)rbuf, M_TEMP);
1608 if (cookies)
1609 free((caddr_t)cookies, M_TEMP);
1610 if (nd->nd_flag & ND_NFSV3)
1611 nfsrv_postopattr(nd, getret, &at);
1612 goto out;
1613 }
1614 /*
1615 * If nothing read, return eof
1616 * rpc reply
1617 */
1618 if (siz == 0) {
1619 vput(vp);
1620 if (nd->nd_flag & ND_NFSV2) {
1621 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1622 } else {
1623 nfsrv_postopattr(nd, getret, &at);
1624 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1625 txdr_hyper(at.na_filerev, tl);
1626 tl += 2;
1627 }
1628 *tl++ = newnfs_false;
1629 *tl = newnfs_true;
1630 FREE((caddr_t)rbuf, M_TEMP);
1631 FREE((caddr_t)cookies, M_TEMP);
1632 goto out;
1633 }
1634
1635 /*
1636 * Check for degenerate cases of nothing useful read.
1637 * If so go try again
1638 */
1639 cpos = rbuf;
1640 cend = rbuf + siz;
1641 dp = (struct dirent *)cpos;
1642 cookiep = cookies;
1643
1644 /*
1645 * For some reason FreeBSD's ufs_readdir() chooses to back the
1646 * directory offset up to a block boundary, so it is necessary to
1647 * skip over the records that precede the requested offset. This
1648 * requires the assumption that file offset cookies monotonically
1649 * increase.
1650 * Since the offset cookies don't monotonically increase for ZFS,
1651 * this is not done when ZFS is the file system.
1652 */
1653 while (cpos < cend && ncookies > 0 &&
1654 (dp->d_fileno == 0 || dp->d_type == DT_WHT ||
1655 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) {
1656 cpos += dp->d_reclen;
1657 dp = (struct dirent *)cpos;
1658 cookiep++;
1659 ncookies--;
1660 }
1661 if (cpos >= cend || ncookies == 0) {
1662 siz = fullsiz;
1663 toff = off;
1664 goto again;
1665 }
1666 vput(vp);
1667
1668 /*
1669 * dirlen is the size of the reply, including all XDR and must
1670 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate
1671 * if the XDR should be included in "count", but to be safe, we do.
1672 * (Include the two booleans at the end of the reply in dirlen now.)
1673 */
1674 if (nd->nd_flag & ND_NFSV3) {
1675 nfsrv_postopattr(nd, getret, &at);
1676 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1677 txdr_hyper(at.na_filerev, tl);
1678 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
1679 } else {
1680 dirlen = 2 * NFSX_UNSIGNED;
1681 }
1682
1683 /* Loop through the records and build reply */
1684 while (cpos < cend && ncookies > 0) {
1685 nlen = dp->d_namlen;
1686 if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
1687 nlen <= NFS_MAXNAMLEN) {
1688 if (nd->nd_flag & ND_NFSV3)
1689 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
1690 else
1691 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
1692 if (dirlen > cnt) {
1693 eofflag = 0;
1694 break;
1695 }
1696
1697 /*
1698 * Build the directory record xdr from
1699 * the dirent entry.
1700 */
1701 if (nd->nd_flag & ND_NFSV3) {
1702 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1703 *tl++ = newnfs_true;
1704 *tl++ = 0;
1705 } else {
1706 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1707 *tl++ = newnfs_true;
1708 }
1709 *tl = txdr_unsigned(dp->d_fileno);
1710 (void) nfsm_strtom(nd, dp->d_name, nlen);
1711 if (nd->nd_flag & ND_NFSV3) {
1712 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1713 *tl++ = 0;
1714 } else
1715 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1716 *tl = txdr_unsigned(*cookiep);
1717 }
1718 cpos += dp->d_reclen;
1719 dp = (struct dirent *)cpos;
1720 cookiep++;
1721 ncookies--;
1722 }
1723 if (cpos < cend)
1724 eofflag = 0;
1725 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1726 *tl++ = newnfs_false;
1727 if (eofflag)
1728 *tl = newnfs_true;
1729 else
1730 *tl = newnfs_false;
1731 FREE((caddr_t)rbuf, M_TEMP);
1732 FREE((caddr_t)cookies, M_TEMP);
1733
1734 out:
1735 NFSEXITCODE2(0, nd);
1736 return (0);
1737 nfsmout:
1738 vput(vp);
1739 NFSEXITCODE2(error, nd);
1740 return (error);
1741 }
1742
1743 /*
1744 * Readdirplus for V3 and Readdir for V4.
1745 */
1746 int
1747 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram,
1748 struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
1749 {
1750 struct dirent *dp;
1751 u_int32_t *tl;
1752 int dirlen;
1753 char *cpos, *cend, *rbuf;
1754 struct vnode *nvp;
1755 fhandle_t nfh;
1756 struct nfsvattr nva, at, *nvap = &nva;
1757 struct mbuf *mb0, *mb1;
1758 struct nfsreferral *refp;
1759 int nlen, r, error = 0, getret = 1, usevget = 1;
1760 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt;
1761 caddr_t bpos0, bpos1;
1762 u_int64_t off, toff, verf;
1763 u_long *cookies = NULL, *cookiep;
1764 nfsattrbit_t attrbits, rderrbits, savbits;
1765 struct uio io;
1766 struct iovec iv;
1767 struct componentname cn;
1768 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls;
1769 struct mount *mp, *new_mp;
1770 uint64_t mounted_on_fileno;
1771
1772 if (nd->nd_repstat) {
1773 nfsrv_postopattr(nd, getret, &at);
1774 goto out;
1775 }
1776 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
1777 off = fxdr_hyper(tl);
1778 toff = off;
1779 tl += 2;
1780 verf = fxdr_hyper(tl);
1781 tl += 2;
1782 siz = fxdr_unsigned(int, *tl++);
1783 cnt = fxdr_unsigned(int, *tl);
1784
1785 /*
1786 * Use the server's maximum data transfer size as the upper bound
1787 * on reply datalen.
1788 */
1789 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0)
1790 cnt = NFS_SRVMAXDATA(nd);
1791
1792 /*
1793 * siz is a "hint" of how much directory information (name, fileid,
1794 * cookie) should be in the reply. At least one client "hints" 0,
1795 * so I set it to cnt for that case. I also round it up to the
1796 * next multiple of DIRBLKSIZ.
1797 */
1798 if (siz <= 0)
1799 siz = cnt;
1800 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
1801
1802 if (nd->nd_flag & ND_NFSV4) {
1803 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
1804 if (error)
1805 goto nfsmout;
1806 NFSSET_ATTRBIT(&savbits, &attrbits);
1807 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits);
1808 NFSZERO_ATTRBIT(&rderrbits);
1809 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR);
1810 } else {
1811 NFSZERO_ATTRBIT(&attrbits);
1812 }
1813 fullsiz = siz;
1814 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
1815 if (!nd->nd_repstat) {
1816 if (off && verf != at.na_filerev) {
1817 /*
1818 * va_filerev is not sufficient as a cookie verifier,
1819 * since it is not supposed to change when entries are
1820 * removed/added unless that offset cookies returned to
1821 * the client are no longer valid.
1822 */
1823 #if 0
1824 if (nd->nd_flag & ND_NFSV4) {
1825 nd->nd_repstat = NFSERR_NOTSAME;
1826 } else {
1827 nd->nd_repstat = NFSERR_BAD_COOKIE;
1828 }
1829 #endif
1830 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) {
1831 nd->nd_repstat = NFSERR_BAD_COOKIE;
1832 }
1833 }
1834 if (!nd->nd_repstat && vp->v_type != VDIR)
1835 nd->nd_repstat = NFSERR_NOTDIR;
1836 if (!nd->nd_repstat && cnt == 0)
1837 nd->nd_repstat = NFSERR_TOOSMALL;
1838 if (!nd->nd_repstat)
1839 nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
1840 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
1841 NFSACCCHK_VPISLOCKED, NULL);
1842 if (nd->nd_repstat) {
1843 vput(vp);
1844 if (nd->nd_flag & ND_NFSV3)
1845 nfsrv_postopattr(nd, getret, &at);
1846 goto out;
1847 }
1848 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs");
1849
1850 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
1851 again:
1852 eofflag = 0;
1853 if (cookies) {
1854 free((caddr_t)cookies, M_TEMP);
1855 cookies = NULL;
1856 }
1857
1858 iv.iov_base = rbuf;
1859 iv.iov_len = siz;
1860 io.uio_iov = &iv;
1861 io.uio_iovcnt = 1;
1862 io.uio_offset = (off_t)off;
1863 io.uio_resid = siz;
1864 io.uio_segflg = UIO_SYSSPACE;
1865 io.uio_rw = UIO_READ;
1866 io.uio_td = NULL;
1867 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
1868 &cookies);
1869 off = (u_int64_t)io.uio_offset;
1870 if (io.uio_resid)
1871 siz -= io.uio_resid;
1872
1873 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
1874
1875 if (!cookies && !nd->nd_repstat)
1876 nd->nd_repstat = NFSERR_PERM;
1877 if (!nd->nd_repstat)
1878 nd->nd_repstat = getret;
1879 if (nd->nd_repstat) {
1880 vput(vp);
1881 if (cookies)
1882 free((caddr_t)cookies, M_TEMP);
1883 free((caddr_t)rbuf, M_TEMP);
1884 if (nd->nd_flag & ND_NFSV3)
1885 nfsrv_postopattr(nd, getret, &at);
1886 goto out;
1887 }
1888 /*
1889 * If nothing read, return eof
1890 * rpc reply
1891 */
1892 if (siz == 0) {
1893 vput(vp);
1894 if (nd->nd_flag & ND_NFSV3)
1895 nfsrv_postopattr(nd, getret, &at);
1896 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1897 txdr_hyper(at.na_filerev, tl);
1898 tl += 2;
1899 *tl++ = newnfs_false;
1900 *tl = newnfs_true;
1901 free((caddr_t)cookies, M_TEMP);
1902 free((caddr_t)rbuf, M_TEMP);
1903 goto out;
1904 }
1905
1906 /*
1907 * Check for degenerate cases of nothing useful read.
1908 * If so go try again
1909 */
1910 cpos = rbuf;
1911 cend = rbuf + siz;
1912 dp = (struct dirent *)cpos;
1913 cookiep = cookies;
1914
1915 /*
1916 * For some reason FreeBSD's ufs_readdir() chooses to back the
1917 * directory offset up to a block boundary, so it is necessary to
1918 * skip over the records that precede the requested offset. This
1919 * requires the assumption that file offset cookies monotonically
1920 * increase.
1921 * Since the offset cookies don't monotonically increase for ZFS,
1922 * this is not done when ZFS is the file system.
1923 */
1924 while (cpos < cend && ncookies > 0 &&
1925 (dp->d_fileno == 0 || dp->d_type == DT_WHT ||
1926 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) ||
1927 ((nd->nd_flag & ND_NFSV4) &&
1928 ((dp->d_namlen == 1 && dp->d_name[0] == '.') ||
1929 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) {
1930 cpos += dp->d_reclen;
1931 dp = (struct dirent *)cpos;
1932 cookiep++;
1933 ncookies--;
1934 }
1935 if (cpos >= cend || ncookies == 0) {
1936 siz = fullsiz;
1937 toff = off;
1938 goto again;
1939 }
1940
1941 /*
1942 * Busy the file system so that the mount point won't go away
1943 * and, as such, VFS_VGET() can be used safely.
1944 */
1945 mp = vp->v_mount;
1946 vfs_ref(mp);
1947 NFSVOPUNLOCK(vp, 0);
1948 nd->nd_repstat = vfs_busy(mp, 0);
1949 vfs_rel(mp);
1950 if (nd->nd_repstat != 0) {
1951 vrele(vp);
1952 free(cookies, M_TEMP);
1953 free(rbuf, M_TEMP);
1954 if (nd->nd_flag & ND_NFSV3)
1955 nfsrv_postopattr(nd, getret, &at);
1956 goto out;
1957 }
1958
1959 /*
1960 * Save this position, in case there is an error before one entry
1961 * is created.
1962 */
1963 mb0 = nd->nd_mb;
1964 bpos0 = nd->nd_bpos;
1965
1966 /*
1967 * Fill in the first part of the reply.
1968 * dirlen is the reply length in bytes and cannot exceed cnt.
1969 * (Include the two booleans at the end of the reply in dirlen now,
1970 * so we recognize when we have exceeded cnt.)
1971 */
1972 if (nd->nd_flag & ND_NFSV3) {
1973 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
1974 nfsrv_postopattr(nd, getret, &at);
1975 } else {
1976 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED;
1977 }
1978 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
1979 txdr_hyper(at.na_filerev, tl);
1980
1981 /*
1982 * Save this position, in case there is an empty reply needed.
1983 */
1984 mb1 = nd->nd_mb;
1985 bpos1 = nd->nd_bpos;
1986
1987 /* Loop through the records and build reply */
1988 entrycnt = 0;
1989 while (cpos < cend && ncookies > 0 && dirlen < cnt) {
1990 nlen = dp->d_namlen;
1991 if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
1992 nlen <= NFS_MAXNAMLEN &&
1993 ((nd->nd_flag & ND_NFSV3) || nlen > 2 ||
1994 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.'))
1995 || (nlen == 1 && dp->d_name[0] != '.'))) {
1996 /*
1997 * Save the current position in the reply, in case
1998 * this entry exceeds cnt.
1999 */
2000 mb1 = nd->nd_mb;
2001 bpos1 = nd->nd_bpos;
2002
2003 /*
2004 * For readdir_and_lookup get the vnode using
2005 * the file number.
2006 */
2007 nvp = NULL;
2008 refp = NULL;
2009 r = 0;
2010 at_root = 0;
2011 needs_unbusy = 0;
2012 new_mp = mp;
2013 mounted_on_fileno = (uint64_t)dp->d_fileno;
2014 if ((nd->nd_flag & ND_NFSV3) ||
2015 NFSNONZERO_ATTRBIT(&savbits)) {
2016 if (nd->nd_flag & ND_NFSV4)
2017 refp = nfsv4root_getreferral(NULL,
2018 vp, dp->d_fileno);
2019 if (refp == NULL) {
2020 if (usevget)
2021 r = VFS_VGET(mp, dp->d_fileno,
2022 LK_SHARED, &nvp);
2023 else
2024 r = EOPNOTSUPP;
2025 if (r == EOPNOTSUPP) {
2026 if (usevget) {
2027 usevget = 0;
2028 cn.cn_nameiop = LOOKUP;
2029 cn.cn_lkflags =
2030 LK_SHARED |
2031 LK_RETRY;
2032 cn.cn_cred =
2033 nd->nd_cred;
2034 cn.cn_thread = p;
2035 }
2036 cn.cn_nameptr = dp->d_name;
2037 cn.cn_namelen = nlen;
2038 cn.cn_flags = ISLASTCN |
2039 NOFOLLOW | LOCKLEAF |
2040 MPSAFE;
2041 if (nlen == 2 &&
2042 dp->d_name[0] == '.' &&
2043 dp->d_name[1] == '.')
2044 cn.cn_flags |=
2045 ISDOTDOT;
2046 if (NFSVOPLOCK(vp, LK_SHARED)
2047 != 0) {
2048 nd->nd_repstat = EPERM;
2049 break;
2050 }
2051 if ((vp->v_vflag & VV_ROOT) != 0
2052 && (cn.cn_flags & ISDOTDOT)
2053 != 0) {
2054 vref(vp);
2055 nvp = vp;
2056 r = 0;
2057 } else {
2058 r = VOP_LOOKUP(vp, &nvp,
2059 &cn);
2060 if (vp != nvp)
2061 NFSVOPUNLOCK(vp,
2062 0);
2063 }
2064 }
2065
2066 /*
2067 * For NFSv4, check to see if nvp is
2068 * a mount point and get the mount
2069 * point vnode, as required.
2070 */
2071 if (r == 0 &&
2072 nfsrv_enable_crossmntpt != 0 &&
2073 (nd->nd_flag & ND_NFSV4) != 0 &&
2074 nvp->v_type == VDIR &&
2075 nvp->v_mountedhere != NULL) {
2076 new_mp = nvp->v_mountedhere;
2077 r = vfs_busy(new_mp, 0);
2078 vput(nvp);
2079 nvp = NULL;
2080 if (r == 0) {
2081 r = VFS_ROOT(new_mp,
2082 LK_SHARED, &nvp);
2083 needs_unbusy = 1;
2084 if (r == 0)
2085 at_root = 1;
2086 }
2087 }
2088 }
2089 if (!r) {
2090 if (refp == NULL &&
2091 ((nd->nd_flag & ND_NFSV3) ||
2092 NFSNONZERO_ATTRBIT(&attrbits))) {
2093 r = nfsvno_getfh(nvp, &nfh, p);
2094 if (!r)
2095 r = nfsvno_getattr(nvp, nvap,
2096 nd->nd_cred, p, 1);
2097 }
2098 } else {
2099 nvp = NULL;
2100 }
2101 if (r) {
2102 if (!NFSISSET_ATTRBIT(&attrbits,
2103 NFSATTRBIT_RDATTRERROR)) {
2104 if (nvp != NULL)
2105 vput(nvp);
2106 if (needs_unbusy != 0)
2107 vfs_unbusy(new_mp);
2108 nd->nd_repstat = r;
2109 break;
2110 }
2111 }
2112 }
2113
2114 /*
2115 * Build the directory record xdr
2116 */
2117 if (nd->nd_flag & ND_NFSV3) {
2118 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2119 *tl++ = newnfs_true;
2120 *tl++ = 0;
2121 *tl = txdr_unsigned(dp->d_fileno);
2122 dirlen += nfsm_strtom(nd, dp->d_name, nlen);
2123 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2124 *tl++ = 0;
2125 *tl = txdr_unsigned(*cookiep);
2126 nfsrv_postopattr(nd, 0, nvap);
2127 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1);
2128 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR);
2129 if (nvp != NULL)
2130 vput(nvp);
2131 } else {
2132 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2133 *tl++ = newnfs_true;
2134 *tl++ = 0;
2135 *tl = txdr_unsigned(*cookiep);
2136 dirlen += nfsm_strtom(nd, dp->d_name, nlen);
2137 if (nvp != NULL) {
2138 supports_nfsv4acls =
2139 nfs_supportsnfsv4acls(nvp);
2140 NFSVOPUNLOCK(nvp, 0);
2141 } else
2142 supports_nfsv4acls = 0;
2143 if (refp != NULL) {
2144 dirlen += nfsrv_putreferralattr(nd,
2145 &savbits, refp, 0,
2146 &nd->nd_repstat);
2147 if (nd->nd_repstat) {
2148 if (nvp != NULL)
2149 vrele(nvp);
2150 if (needs_unbusy != 0)
2151 vfs_unbusy(new_mp);
2152 break;
2153 }
2154 } else if (r) {
2155 dirlen += nfsvno_fillattr(nd, new_mp,
2156 nvp, nvap, &nfh, r, &rderrbits,
2157 nd->nd_cred, p, isdgram, 0,
2158 supports_nfsv4acls, at_root,
2159 mounted_on_fileno);
2160 } else {
2161 dirlen += nfsvno_fillattr(nd, new_mp,
2162 nvp, nvap, &nfh, r, &attrbits,
2163 nd->nd_cred, p, isdgram, 0,
2164 supports_nfsv4acls, at_root,
2165 mounted_on_fileno);
2166 }
2167 if (nvp != NULL)
2168 vrele(nvp);
2169 dirlen += (3 * NFSX_UNSIGNED);
2170 }
2171 if (needs_unbusy != 0)
2172 vfs_unbusy(new_mp);
2173 if (dirlen <= cnt)
2174 entrycnt++;
2175 }
2176 cpos += dp->d_reclen;
2177 dp = (struct dirent *)cpos;
2178 cookiep++;
2179 ncookies--;
2180 }
2181 vrele(vp);
2182 vfs_unbusy(mp);
2183
2184 /*
2185 * If dirlen > cnt, we must strip off the last entry. If that
2186 * results in an empty reply, report NFSERR_TOOSMALL.
2187 */
2188 if (dirlen > cnt || nd->nd_repstat) {
2189 if (!nd->nd_repstat && entrycnt == 0)
2190 nd->nd_repstat = NFSERR_TOOSMALL;
2191 if (nd->nd_repstat)
2192 newnfs_trimtrailing(nd, mb0, bpos0);
2193 else
2194 newnfs_trimtrailing(nd, mb1, bpos1);
2195 eofflag = 0;
2196 } else if (cpos < cend)
2197 eofflag = 0;
2198 if (!nd->nd_repstat) {
2199 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2200 *tl++ = newnfs_false;
2201 if (eofflag)
2202 *tl = newnfs_true;
2203 else
2204 *tl = newnfs_false;
2205 }
2206 FREE((caddr_t)cookies, M_TEMP);
2207 FREE((caddr_t)rbuf, M_TEMP);
2208
2209 out:
2210 NFSEXITCODE2(0, nd);
2211 return (0);
2212 nfsmout:
2213 vput(vp);
2214 NFSEXITCODE2(error, nd);
2215 return (error);
2216 }
2217
2218 /*
2219 * Get the settable attributes out of the mbuf list.
2220 * (Return 0 or EBADRPC)
2221 */
2222 int
2223 nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap,
2224 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
2225 {
2226 u_int32_t *tl;
2227 struct nfsv2_sattr *sp;
2228 struct timeval curtime;
2229 int error = 0, toclient = 0;
2230
2231 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) {
2232 case ND_NFSV2:
2233 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2234 /*
2235 * Some old clients didn't fill in the high order 16bits.
2236 * --> check the low order 2 bytes for 0xffff
2237 */
2238 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
2239 nvap->na_mode = nfstov_mode(sp->sa_mode);
2240 if (sp->sa_uid != newnfs_xdrneg1)
2241 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid);
2242 if (sp->sa_gid != newnfs_xdrneg1)
2243 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid);
2244 if (sp->sa_size != newnfs_xdrneg1)
2245 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size);
2246 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) {
2247 #ifdef notyet
2248 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime);
2249 #else
2250 nvap->na_atime.tv_sec =
2251 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec);
2252 nvap->na_atime.tv_nsec = 0;
2253 #endif
2254 }
2255 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1)
2256 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime);
2257 break;
2258 case ND_NFSV3:
2259 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2260 if (*tl == newnfs_true) {
2261 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2262 nvap->na_mode = nfstov_mode(*tl);
2263 }
2264 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2265 if (*tl == newnfs_true) {
2266 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2267 nvap->na_uid = fxdr_unsigned(uid_t, *tl);
2268 }
2269 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2270 if (*tl == newnfs_true) {
2271 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2272 nvap->na_gid = fxdr_unsigned(gid_t, *tl);
2273 }
2274 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2275 if (*tl == newnfs_true) {
2276 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2277 nvap->na_size = fxdr_hyper(tl);
2278 }
2279 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2280 switch (fxdr_unsigned(int, *tl)) {
2281 case NFSV3SATTRTIME_TOCLIENT:
2282 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2283 fxdr_nfsv3time(tl, &nvap->na_atime);
2284 toclient = 1;
2285 break;
2286 case NFSV3SATTRTIME_TOSERVER:
2287 NFSGETTIME(&curtime);
2288 nvap->na_atime.tv_sec = curtime.tv_sec;
2289 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000;
2290 nvap->na_vaflags |= VA_UTIMES_NULL;
2291 break;
2292 };
2293 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2294 switch (fxdr_unsigned(int, *tl)) {
2295 case NFSV3SATTRTIME_TOCLIENT:
2296 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2297 fxdr_nfsv3time(tl, &nvap->na_mtime);
2298 nvap->na_vaflags &= ~VA_UTIMES_NULL;
2299 break;
2300 case NFSV3SATTRTIME_TOSERVER:
2301 NFSGETTIME(&curtime);
2302 nvap->na_mtime.tv_sec = curtime.tv_sec;
2303 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000;
2304 if (!toclient)
2305 nvap->na_vaflags |= VA_UTIMES_NULL;
2306 break;
2307 };
2308 break;
2309 case ND_NFSV4:
2310 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p);
2311 };
2312 nfsmout:
2313 NFSEXITCODE2(error, nd);
2314 return (error);
2315 }
2316
2317 /*
2318 * Handle the setable attributes for V4.
2319 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise.
2320 */
2321 int
2322 nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap,
2323 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
2324 {
2325 u_int32_t *tl;
2326 int attrsum = 0;
2327 int i, j;
2328 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0;
2329 int toclient = 0;
2330 u_char *cp, namestr[NFSV4_SMALLSTR + 1];
2331 uid_t uid;
2332 gid_t gid;
2333 struct timeval curtime;
2334
2335 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup);
2336 if (error)
2337 goto nfsmout;
2338 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2339 attrsize = fxdr_unsigned(int, *tl);
2340
2341 /*
2342 * Loop around getting the setable attributes. If an unsupported
2343 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return.
2344 */
2345 if (retnotsup) {
2346 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2347 bitpos = NFSATTRBIT_MAX;
2348 } else {
2349 bitpos = 0;
2350 }
2351 for (; bitpos < NFSATTRBIT_MAX; bitpos++) {
2352 if (attrsum > attrsize) {
2353 error = NFSERR_BADXDR;
2354 goto nfsmout;
2355 }
2356 if (NFSISSET_ATTRBIT(attrbitp, bitpos))
2357 switch (bitpos) {
2358 case NFSATTRBIT_SIZE:
2359 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
2360 nvap->na_size = fxdr_hyper(tl);
2361 attrsum += NFSX_HYPER;
2362 break;
2363 case NFSATTRBIT_ACL:
2364 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize,
2365 p);
2366 if (error)
2367 goto nfsmout;
2368 if (aceerr && !nd->nd_repstat)
2369 nd->nd_repstat = aceerr;
2370 attrsum += aclsize;
2371 break;
2372 case NFSATTRBIT_ARCHIVE:
2373 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2374 if (!nd->nd_repstat)
2375 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2376 attrsum += NFSX_UNSIGNED;
2377 break;
2378 case NFSATTRBIT_HIDDEN:
2379 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2380 if (!nd->nd_repstat)
2381 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2382 attrsum += NFSX_UNSIGNED;
2383 break;
2384 case NFSATTRBIT_MIMETYPE:
2385 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2386 i = fxdr_unsigned(int, *tl);
2387 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
2388 if (error)
2389 goto nfsmout;
2390 if (!nd->nd_repstat)
2391 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2392 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i));
2393 break;
2394 case NFSATTRBIT_MODE:
2395 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2396 nvap->na_mode = nfstov_mode(*tl);
2397 attrsum += NFSX_UNSIGNED;
2398 break;
2399 case NFSATTRBIT_OWNER:
2400 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2401 j = fxdr_unsigned(int, *tl);
2402 if (j < 0) {
2403 error = NFSERR_BADXDR;
2404 goto nfsmout;
2405 }
2406 if (j > NFSV4_SMALLSTR)
2407 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
2408 else
2409 cp = namestr;
2410 error = nfsrv_mtostr(nd, cp, j);
2411 if (error) {
2412 if (j > NFSV4_SMALLSTR)
2413 free(cp, M_NFSSTRING);
2414 goto nfsmout;
2415 }
2416 if (!nd->nd_repstat) {
2417 nd->nd_repstat = nfsv4_strtouid(cp,j,&uid,p);
2418 if (!nd->nd_repstat)
2419 nvap->na_uid = uid;
2420 }
2421 if (j > NFSV4_SMALLSTR)
2422 free(cp, M_NFSSTRING);
2423 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
2424 break;
2425 case NFSATTRBIT_OWNERGROUP:
2426 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2427 j = fxdr_unsigned(int, *tl);
2428 if (j < 0) {
2429 error = NFSERR_BADXDR;
2430 goto nfsmout;
2431 }
2432 if (j > NFSV4_SMALLSTR)
2433 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
2434 else
2435 cp = namestr;
2436 error = nfsrv_mtostr(nd, cp, j);
2437 if (error) {
2438 if (j > NFSV4_SMALLSTR)
2439 free(cp, M_NFSSTRING);
2440 goto nfsmout;
2441 }
2442 if (!nd->nd_repstat) {
2443 nd->nd_repstat = nfsv4_strtogid(cp,j,&gid,p);
2444 if (!nd->nd_repstat)
2445 nvap->na_gid = gid;
2446 }
2447 if (j > NFSV4_SMALLSTR)
2448 free(cp, M_NFSSTRING);
2449 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
2450 break;
2451 case NFSATTRBIT_SYSTEM:
2452 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2453 if (!nd->nd_repstat)
2454 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2455 attrsum += NFSX_UNSIGNED;
2456 break;
2457 case NFSATTRBIT_TIMEACCESSSET:
2458 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2459 attrsum += NFSX_UNSIGNED;
2460 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
2461 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2462 fxdr_nfsv4time(tl, &nvap->na_atime);
2463 toclient = 1;
2464 attrsum += NFSX_V4TIME;
2465 } else {
2466 NFSGETTIME(&curtime);
2467 nvap->na_atime.tv_sec = curtime.tv_sec;
2468 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000;
2469 nvap->na_vaflags |= VA_UTIMES_NULL;
2470 }
2471 break;
2472 case NFSATTRBIT_TIMEBACKUP:
2473 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2474 if (!nd->nd_repstat)
2475 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2476 attrsum += NFSX_V4TIME;
2477 break;
2478 case NFSATTRBIT_TIMECREATE:
2479 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2480 if (!nd->nd_repstat)
2481 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2482 attrsum += NFSX_V4TIME;
2483 break;
2484 case NFSATTRBIT_TIMEMODIFYSET:
2485 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2486 attrsum += NFSX_UNSIGNED;
2487 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
2488 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2489 fxdr_nfsv4time(tl, &nvap->na_mtime);
2490 nvap->na_vaflags &= ~VA_UTIMES_NULL;
2491 attrsum += NFSX_V4TIME;
2492 } else {
2493 NFSGETTIME(&curtime);
2494 nvap->na_mtime.tv_sec = curtime.tv_sec;
2495 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000;
2496 if (!toclient)
2497 nvap->na_vaflags |= VA_UTIMES_NULL;
2498 }
2499 break;
2500 default:
2501 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2502 /*
2503 * set bitpos so we drop out of the loop.
2504 */
2505 bitpos = NFSATTRBIT_MAX;
2506 break;
2507 };
2508 }
2509
2510 /*
2511 * some clients pad the attrlist, so we need to skip over the
2512 * padding.
2513 */
2514 if (attrsum > attrsize) {
2515 error = NFSERR_BADXDR;
2516 } else {
2517 attrsize = NFSM_RNDUP(attrsize);
2518 if (attrsum < attrsize)
2519 error = nfsm_advance(nd, attrsize - attrsum, -1);
2520 }
2521 nfsmout:
2522 NFSEXITCODE2(error, nd);
2523 return (error);
2524 }
2525
2526 /*
2527 * Check/setup export credentials.
2528 */
2529 int
2530 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp,
2531 struct ucred *credanon)
2532 {
2533 int error = 0;
2534
2535 /*
2536 * Check/setup credentials.
2537 */
2538 if (nd->nd_flag & ND_GSS)
2539 exp->nes_exflag &= ~MNT_EXPORTANON;
2540
2541 /*
2542 * Check to see if the operation is allowed for this security flavor.
2543 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to
2544 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS.
2545 * Also, allow Secinfo, so that it can acquire the correct flavor(s).
2546 */
2547 if (nfsvno_testexp(nd, exp) &&
2548 nd->nd_procnum != NFSV4OP_SECINFO &&
2549 nd->nd_procnum != NFSPROC_FSINFO) {
2550 if (nd->nd_flag & ND_NFSV4)
2551 error = NFSERR_WRONGSEC;
2552 else
2553 error = (NFSERR_AUTHERR | AUTH_TOOWEAK);
2554 goto out;
2555 }
2556
2557 /*
2558 * Check to see if the file system is exported V4 only.
2559 */
2560 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) {
2561 error = NFSERR_PROGNOTV4;
2562 goto out;
2563 }
2564
2565 /*
2566 * Now, map the user credentials.
2567 * (Note that ND_AUTHNONE will only be set for an NFSv3
2568 * Fsinfo RPC. If set for anything else, this code might need
2569 * to change.)
2570 */
2571 if (NFSVNO_EXPORTED(exp) &&
2572 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) ||
2573 NFSVNO_EXPORTANON(exp) ||
2574 (nd->nd_flag & ND_AUTHNONE))) {
2575 nd->nd_cred->cr_uid = credanon->cr_uid;
2576 nd->nd_cred->cr_gid = credanon->cr_gid;
2577 crsetgroups(nd->nd_cred, credanon->cr_ngroups,
2578 credanon->cr_groups);
2579 }
2580
2581 out:
2582 NFSEXITCODE2(error, nd);
2583 return (error);
2584 }
2585
2586 /*
2587 * Check exports.
2588 */
2589 int
2590 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp,
2591 struct ucred **credp)
2592 {
2593 int i, error, *secflavors;
2594
2595 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
2596 &exp->nes_numsecflavor, &secflavors);
2597 if (error) {
2598 if (nfs_rootfhset) {
2599 exp->nes_exflag = 0;
2600 exp->nes_numsecflavor = 0;
2601 error = 0;
2602 }
2603 } else {
2604 /* Copy the security flavors. */
2605 for (i = 0; i < exp->nes_numsecflavor; i++)
2606 exp->nes_secflavors[i] = secflavors[i];
2607 }
2608 NFSEXITCODE(error);
2609 return (error);
2610 }
2611
2612 /*
2613 * Get a vnode for a file handle and export stuff.
2614 */
2615 int
2616 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam,
2617 int lktype, struct vnode **vpp, struct nfsexstuff *exp,
2618 struct ucred **credp)
2619 {
2620 int i, error, *secflavors;
2621
2622 *credp = NULL;
2623 exp->nes_numsecflavor = 0;
2624 if (VFS_NEEDSGIANT(mp))
2625 error = ESTALE;
2626 else
2627 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, vpp);
2628 if (error != 0)
2629 /* Make sure the server replies ESTALE to the client. */
2630 error = ESTALE;
2631 if (nam && !error) {
2632 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
2633 &exp->nes_numsecflavor, &secflavors);
2634 if (error) {
2635 if (nfs_rootfhset) {
2636 exp->nes_exflag = 0;
2637 exp->nes_numsecflavor = 0;
2638 error = 0;
2639 } else {
2640 vput(*vpp);
2641 }
2642 } else {
2643 /* Copy the security flavors. */
2644 for (i = 0; i < exp->nes_numsecflavor; i++)
2645 exp->nes_secflavors[i] = secflavors[i];
2646 }
2647 }
2648 if (error == 0 && lktype == LK_SHARED)
2649 /*
2650 * It would be much better to pass lktype to VFS_FHTOVP(),
2651 * but this will have to do until VFS_FHTOVP() has a lock
2652 * type argument like VFS_VGET().
2653 */
2654 NFSVOPLOCK(*vpp, LK_DOWNGRADE | LK_RETRY);
2655
2656 NFSEXITCODE(error);
2657 return (error);
2658 }
2659
2660 /*
2661 * nfsd_fhtovp() - convert a fh to a vnode ptr
2662 * - look up fsid in mount list (if not found ret error)
2663 * - get vp and export rights by calling nfsvno_fhtovp()
2664 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
2665 * for AUTH_SYS
2666 * - if mpp != NULL, return the mount point so that it can
2667 * be used for vn_finished_write() by the caller
2668 */
2669 void
2670 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype,
2671 struct vnode **vpp, struct nfsexstuff *exp,
2672 struct mount **mpp, int startwrite, struct thread *p)
2673 {
2674 struct mount *mp;
2675 struct ucred *credanon;
2676 fhandle_t *fhp;
2677
2678 fhp = (fhandle_t *)nfp->nfsrvfh_data;
2679 /*
2680 * Check for the special case of the nfsv4root_fh.
2681 */
2682 mp = vfs_busyfs(&fhp->fh_fsid);
2683 if (mpp != NULL)
2684 *mpp = mp;
2685 if (mp == NULL) {
2686 *vpp = NULL;
2687 nd->nd_repstat = ESTALE;
2688 goto out;
2689 }
2690
2691 if (startwrite)
2692 vn_start_write(NULL, mpp, V_WAIT);
2693
2694 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp,
2695 &credanon);
2696 vfs_unbusy(mp);
2697
2698 /*
2699 * For NFSv4 without a pseudo root fs, unexported file handles
2700 * can be returned, so that Lookup works everywhere.
2701 */
2702 if (!nd->nd_repstat && exp->nes_exflag == 0 &&
2703 !(nd->nd_flag & ND_NFSV4)) {
2704 vput(*vpp);
2705 nd->nd_repstat = EACCES;
2706 }
2707
2708 /*
2709 * Personally, I've never seen any point in requiring a
2710 * reserved port#, since only in the rare case where the
2711 * clients are all boxes with secure system priviledges,
2712 * does it provide any enhanced security, but... some people
2713 * believe it to be useful and keep putting this code back in.
2714 * (There is also some "security checker" out there that
2715 * complains if the nfs server doesn't enforce this.)
2716 * However, note the following:
2717 * RFC3530 (NFSv4) specifies that a reserved port# not be
2718 * required.
2719 * RFC2623 recommends that, if a reserved port# is checked for,
2720 * that there be a way to turn that off--> ifdef'd.
2721 */
2722 #ifdef NFS_REQRSVPORT
2723 if (!nd->nd_repstat) {
2724 struct sockaddr_in *saddr;
2725 struct sockaddr_in6 *saddr6;
2726
2727 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *);
2728 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *);
2729 if (!(nd->nd_flag & ND_NFSV4) &&
2730 ((saddr->sin_family == AF_INET &&
2731 ntohs(saddr->sin_port) >= IPPORT_RESERVED) ||
2732 (saddr6->sin6_family == AF_INET6 &&
2733 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) {
2734 vput(*vpp);
2735 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
2736 }
2737 }
2738 #endif /* NFS_REQRSVPORT */
2739
2740 /*
2741 * Check/setup credentials.
2742 */
2743 if (!nd->nd_repstat) {
2744 nd->nd_saveduid = nd->nd_cred->cr_uid;
2745 nd->nd_repstat = nfsd_excred(nd, exp, credanon);
2746 if (nd->nd_repstat)
2747 vput(*vpp);
2748 }
2749 if (credanon != NULL)
2750 crfree(credanon);
2751 if (nd->nd_repstat) {
2752 if (startwrite)
2753 vn_finished_write(mp);
2754 *vpp = NULL;
2755 if (mpp != NULL)
2756 *mpp = NULL;
2757 }
2758
2759 out:
2760 NFSEXITCODE2(0, nd);
2761 }
2762
2763 /*
2764 * glue for fp.
2765 */
2766 int
2767 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp)
2768 {
2769 struct filedesc *fdp;
2770 struct file *fp;
2771 int error = 0;
2772
2773 fdp = p->td_proc->p_fd;
2774 if (fd >= fdp->fd_nfiles ||
2775 (fp = fdp->fd_ofiles[fd]) == NULL) {
2776 error = EBADF;
2777 goto out;
2778 }
2779 *fpp = fp;
2780
2781 out:
2782 NFSEXITCODE(error);
2783 return (error);
2784 }
2785
2786 /*
2787 * Called from nfssvc() to update the exports list. Just call
2788 * vfs_export(). This has to be done, since the v4 root fake fs isn't
2789 * in the mount list.
2790 */
2791 int
2792 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p)
2793 {
2794 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp;
2795 int error = 0;
2796 struct nameidata nd;
2797 fhandle_t fh;
2798
2799 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export);
2800 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0)
2801 nfs_rootfhset = 0;
2802 else if (error == 0) {
2803 if (nfsexargp->fspec == NULL) {
2804 error = EPERM;
2805 goto out;
2806 }
2807 /*
2808 * If fspec != NULL, this is the v4root path.
2809 */
2810 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_USERSPACE,
2811 nfsexargp->fspec, p);
2812 if ((error = namei(&nd)) != 0)
2813 goto out;
2814 error = nfsvno_getfh(nd.ni_vp, &fh, p);
2815 vrele(nd.ni_vp);
2816 if (!error) {
2817 nfs_rootfh.nfsrvfh_len = NFSX_MYFH;
2818 NFSBCOPY((caddr_t)&fh,
2819 nfs_rootfh.nfsrvfh_data,
2820 sizeof (fhandle_t));
2821 nfs_rootfhset = 1;
2822 }
2823 }
2824
2825 out:
2826 NFSEXITCODE(error);
2827 return (error);
2828 }
2829
2830 /*
2831 * Get the tcp socket sequence numbers we need.
2832 * (Maybe this should be moved to the tcp sources?)
2833 */
2834 int
2835 nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap)
2836 {
2837 struct inpcb *inp;
2838 struct tcpcb *tp;
2839 int error = 0;
2840
2841 inp = sotoinpcb(so);
2842 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL"));
2843 INP_RLOCK(inp);
2844 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) {
2845 INP_RUNLOCK(inp);
2846 error = EPIPE;
2847 goto out;
2848 }
2849 tp = intotcpcb(inp);
2850 if (tp->t_state != TCPS_ESTABLISHED) {
2851 INP_RUNLOCK(inp);
2852 error = EPIPE;
2853 goto out;
2854 }
2855 *maxp = tp->snd_max;
2856 *unap = tp->snd_una;
2857 INP_RUNLOCK(inp);
2858
2859 out:
2860 NFSEXITCODE(error);
2861 return (error);
2862 }
2863
2864 /*
2865 * This function needs to test to see if the system is near its limit
2866 * for memory allocation via malloc() or mget() and return True iff
2867 * either of these resources are near their limit.
2868 * XXX (For now, this is just a stub.)
2869 */
2870 int nfsrv_testmalloclimit = 0;
2871 int
2872 nfsrv_mallocmget_limit(void)
2873 {
2874 static int printmesg = 0;
2875 static int testval = 1;
2876
2877 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) {
2878 if ((printmesg++ % 100) == 0)
2879 printf("nfsd: malloc/mget near limit\n");
2880 return (1);
2881 }
2882 return (0);
2883 }
2884
2885 /*
2886 * BSD specific initialization of a mount point.
2887 */
2888 void
2889 nfsd_mntinit(void)
2890 {
2891 static int inited = 0;
2892
2893 if (inited)
2894 return;
2895 inited = 1;
2896 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED);
2897 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist);
2898 nfsv4root_mnt.mnt_export = NULL;
2899 TAILQ_INIT(&nfsv4root_opt);
2900 TAILQ_INIT(&nfsv4root_newopt);
2901 nfsv4root_mnt.mnt_opt = &nfsv4root_opt;
2902 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt;
2903 nfsv4root_mnt.mnt_nvnodelistsize = 0;
2904 }
2905
2906 /*
2907 * Get a vnode for a file handle, without checking exports, etc.
2908 */
2909 struct vnode *
2910 nfsvno_getvp(fhandle_t *fhp)
2911 {
2912 struct mount *mp;
2913 struct vnode *vp;
2914 int error;
2915
2916 mp = vfs_busyfs(&fhp->fh_fsid);
2917 if (mp == NULL)
2918 return (NULL);
2919 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp);
2920 vfs_unbusy(mp);
2921 if (error)
2922 return (NULL);
2923 return (vp);
2924 }
2925
2926 /*
2927 * Do a local VOP_ADVLOCK().
2928 */
2929 int
2930 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first,
2931 u_int64_t end, struct thread *td)
2932 {
2933 int error = 0;
2934 struct flock fl;
2935 u_int64_t tlen;
2936
2937 if (nfsrv_dolocallocks == 0)
2938 goto out;
2939
2940 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */
2941 if ((vp->v_iflag & VI_DOOMED) != 0) {
2942 error = EPERM;
2943 goto out;
2944 }
2945
2946 fl.l_whence = SEEK_SET;
2947 fl.l_type = ftype;
2948 fl.l_start = (off_t)first;
2949 if (end == NFS64BITSSET) {
2950 fl.l_len = 0;
2951 } else {
2952 tlen = end - first;
2953 fl.l_len = (off_t)tlen;
2954 }
2955 /*
2956 * For FreeBSD8, the l_pid and l_sysid must be set to the same
2957 * values for all calls, so that all locks will be held by the
2958 * nfsd server. (The nfsd server handles conflicts between the
2959 * various clients.)
2960 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024
2961 * bytes, so it can't be put in l_sysid.
2962 */
2963 if (nfsv4_sysid == 0)
2964 nfsv4_sysid = nlm_acquire_next_sysid();
2965 fl.l_pid = (pid_t)0;
2966 fl.l_sysid = (int)nfsv4_sysid;
2967
2968 NFSVOPUNLOCK(vp, 0);
2969 if (ftype == F_UNLCK)
2970 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl,
2971 (F_POSIX | F_REMOTE));
2972 else
2973 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl,
2974 (F_POSIX | F_REMOTE));
2975 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2976
2977 out:
2978 NFSEXITCODE(error);
2979 return (error);
2980 }
2981
2982 /*
2983 * Check the nfsv4 root exports.
2984 */
2985 int
2986 nfsvno_v4rootexport(struct nfsrv_descript *nd)
2987 {
2988 struct ucred *credanon;
2989 int exflags, error = 0, numsecflavor, *secflavors, i;
2990
2991 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags,
2992 &credanon, &numsecflavor, &secflavors);
2993 if (error) {
2994 error = NFSERR_PROGUNAVAIL;
2995 goto out;
2996 }
2997 if (credanon != NULL)
2998 crfree(credanon);
2999 for (i = 0; i < numsecflavor; i++) {
3000 if (secflavors[i] == AUTH_SYS)
3001 nd->nd_flag |= ND_EXAUTHSYS;
3002 else if (secflavors[i] == RPCSEC_GSS_KRB5)
3003 nd->nd_flag |= ND_EXGSS;
3004 else if (secflavors[i] == RPCSEC_GSS_KRB5I)
3005 nd->nd_flag |= ND_EXGSSINTEGRITY;
3006 else if (secflavors[i] == RPCSEC_GSS_KRB5P)
3007 nd->nd_flag |= ND_EXGSSPRIVACY;
3008 }
3009
3010 out:
3011 NFSEXITCODE(error);
3012 return (error);
3013 }
3014
3015 /*
3016 * Nfs server psuedo system call for the nfsd's
3017 */
3018 /*
3019 * MPSAFE
3020 */
3021 static int
3022 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap)
3023 {
3024 struct file *fp;
3025 struct nfsd_addsock_args sockarg;
3026 struct nfsd_nfsd_args nfsdarg;
3027 int error;
3028
3029 if (uap->flag & NFSSVC_NFSDADDSOCK) {
3030 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg));
3031 if (error)
3032 goto out;
3033 /*
3034 * Since we don't know what rights might be required,
3035 * pretend that we need them all. It is better to be too
3036 * careful than too reckless.
3037 */
3038 if ((error = fget(td, sockarg.sock, CAP_SOCK_ALL, &fp)) != 0)
3039 goto out;
3040 if (fp->f_type != DTYPE_SOCKET) {
3041 fdrop(fp, td);
3042 error = EPERM;
3043 goto out;
3044 }
3045 error = nfsrvd_addsock(fp);
3046 fdrop(fp, td);
3047 } else if (uap->flag & NFSSVC_NFSDNFSD) {
3048 if (uap->argp == NULL) {
3049 error = EINVAL;
3050 goto out;
3051 }
3052 error = copyin(uap->argp, (caddr_t)&nfsdarg,
3053 sizeof (nfsdarg));
3054 if (error)
3055 goto out;
3056 error = nfsrvd_nfsd(td, &nfsdarg);
3057 } else {
3058 error = nfssvc_srvcall(td, uap, td->td_ucred);
3059 }
3060
3061 out:
3062 NFSEXITCODE(error);
3063 return (error);
3064 }
3065
3066 static int
3067 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
3068 {
3069 struct nfsex_args export;
3070 struct file *fp = NULL;
3071 int stablefd, len;
3072 struct nfsd_clid adminrevoke;
3073 struct nfsd_dumplist dumplist;
3074 struct nfsd_dumpclients *dumpclients;
3075 struct nfsd_dumplocklist dumplocklist;
3076 struct nfsd_dumplocks *dumplocks;
3077 struct nameidata nd;
3078 vnode_t vp;
3079 int error = EINVAL;
3080 struct proc *procp;
3081
3082 if (uap->flag & NFSSVC_PUBLICFH) {
3083 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data,
3084 sizeof (fhandle_t));
3085 error = copyin(uap->argp,
3086 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t));
3087 if (!error)
3088 nfs_pubfhset = 1;
3089 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) {
3090 error = copyin(uap->argp,(caddr_t)&export,
3091 sizeof (struct nfsex_args));
3092 if (!error)
3093 error = nfsrv_v4rootexport(&export, cred, p);
3094 } else if (uap->flag & NFSSVC_NOPUBLICFH) {
3095 nfs_pubfhset = 0;
3096 error = 0;
3097 } else if (uap->flag & NFSSVC_STABLERESTART) {
3098 error = copyin(uap->argp, (caddr_t)&stablefd,
3099 sizeof (int));
3100 if (!error)
3101 error = fp_getfvp(p, stablefd, &fp, &vp);
3102 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE))
3103 error = EBADF;
3104 if (!error && newnfs_numnfsd != 0)
3105 error = EPERM;
3106 if (!error) {
3107 nfsrv_stablefirst.nsf_fp = fp;
3108 nfsrv_setupstable(p);
3109 }
3110 } else if (uap->flag & NFSSVC_ADMINREVOKE) {
3111 error = copyin(uap->argp, (caddr_t)&adminrevoke,
3112 sizeof (struct nfsd_clid));
3113 if (!error)
3114 error = nfsrv_adminrevoke(&adminrevoke, p);
3115 } else if (uap->flag & NFSSVC_DUMPCLIENTS) {
3116 error = copyin(uap->argp, (caddr_t)&dumplist,
3117 sizeof (struct nfsd_dumplist));
3118 if (!error && (dumplist.ndl_size < 1 ||
3119 dumplist.ndl_size > NFSRV_MAXDUMPLIST))
3120 error = EPERM;
3121 if (!error) {
3122 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size;
3123 dumpclients = (struct nfsd_dumpclients *)malloc(len,
3124 M_TEMP, M_WAITOK);
3125 nfsrv_dumpclients(dumpclients, dumplist.ndl_size);
3126 error = copyout(dumpclients,
3127 CAST_USER_ADDR_T(dumplist.ndl_list), len);
3128 free((caddr_t)dumpclients, M_TEMP);
3129 }
3130 } else if (uap->flag & NFSSVC_DUMPLOCKS) {
3131 error = copyin(uap->argp, (caddr_t)&dumplocklist,
3132 sizeof (struct nfsd_dumplocklist));
3133 if (!error && (dumplocklist.ndllck_size < 1 ||
3134 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST))
3135 error = EPERM;
3136 if (!error)
3137 error = nfsrv_lookupfilename(&nd,
3138 dumplocklist.ndllck_fname, p);
3139 if (!error) {
3140 len = sizeof (struct nfsd_dumplocks) *
3141 dumplocklist.ndllck_size;
3142 dumplocks = (struct nfsd_dumplocks *)malloc(len,
3143 M_TEMP, M_WAITOK);
3144 nfsrv_dumplocks(nd.ni_vp, dumplocks,
3145 dumplocklist.ndllck_size, p);
3146 vput(nd.ni_vp);
3147 error = copyout(dumplocks,
3148 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len);
3149 free((caddr_t)dumplocks, M_TEMP);
3150 }
3151 } else if (uap->flag & NFSSVC_BACKUPSTABLE) {
3152 procp = p->td_proc;
3153 PROC_LOCK(procp);
3154 nfsd_master_pid = procp->p_pid;
3155 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1);
3156 nfsd_master_start = procp->p_stats->p_start;
3157 nfsd_master_proc = procp;
3158 PROC_UNLOCK(procp);
3159 }
3160
3161 NFSEXITCODE(error);
3162 return (error);
3163 }
3164
3165 /*
3166 * Check exports.
3167 * Returns 0 if ok, 1 otherwise.
3168 */
3169 int
3170 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp)
3171 {
3172 int i;
3173
3174 /*
3175 * This seems odd, but allow the case where the security flavor
3176 * list is empty. This happens when NFSv4 is traversing non-exported
3177 * file systems. Exported file systems should always have a non-empty
3178 * security flavor list.
3179 */
3180 if (exp->nes_numsecflavor == 0)
3181 return (0);
3182
3183 for (i = 0; i < exp->nes_numsecflavor; i++) {
3184 /*
3185 * The tests for privacy and integrity must be first,
3186 * since ND_GSS is set for everything but AUTH_SYS.
3187 */
3188 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P &&
3189 (nd->nd_flag & ND_GSSPRIVACY))
3190 return (0);
3191 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I &&
3192 (nd->nd_flag & ND_GSSINTEGRITY))
3193 return (0);
3194 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 &&
3195 (nd->nd_flag & ND_GSS))
3196 return (0);
3197 if (exp->nes_secflavors[i] == AUTH_SYS &&
3198 (nd->nd_flag & ND_GSS) == 0)
3199 return (0);
3200 }
3201 return (1);
3202 }
3203
3204 /*
3205 * Calculate a hash value for the fid in a file handle.
3206 */
3207 uint32_t
3208 nfsrv_hashfh(fhandle_t *fhp)
3209 {
3210 uint32_t hashval;
3211
3212 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0);
3213 return (hashval);
3214 }
3215
3216 /*
3217 * Signal the userland master nfsd to backup the stable restart file.
3218 */
3219 void
3220 nfsrv_backupstable(void)
3221 {
3222 struct proc *procp;
3223
3224 if (nfsd_master_proc != NULL) {
3225 procp = pfind(nfsd_master_pid);
3226 /* Try to make sure it is the correct process. */
3227 if (procp == nfsd_master_proc &&
3228 procp->p_stats->p_start.tv_sec ==
3229 nfsd_master_start.tv_sec &&
3230 procp->p_stats->p_start.tv_usec ==
3231 nfsd_master_start.tv_usec &&
3232 strcmp(procp->p_comm, nfsd_master_comm) == 0)
3233 kern_psignal(procp, SIGUSR2);
3234 else
3235 nfsd_master_proc = NULL;
3236
3237 if (procp != NULL)
3238 PROC_UNLOCK(procp);
3239 }
3240 }
3241
3242 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *);
3243
3244 /*
3245 * Called once to initialize data structures...
3246 */
3247 static int
3248 nfsd_modevent(module_t mod, int type, void *data)
3249 {
3250 int error = 0;
3251 static int loaded = 0;
3252
3253 switch (type) {
3254 case MOD_LOAD:
3255 if (loaded)
3256 goto out;
3257 newnfs_portinit();
3258 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF);
3259 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF);
3260 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL,
3261 MTX_DEF);
3262 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0);
3263 nfsrvd_initcache();
3264 nfsd_init();
3265 NFSD_LOCK();
3266 nfsrvd_init(0);
3267 NFSD_UNLOCK();
3268 nfsd_mntinit();
3269 #ifdef VV_DISABLEDELEG
3270 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation;
3271 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation;
3272 #endif
3273 nfsd_call_servertimer = nfsrv_servertimer;
3274 nfsd_call_nfsd = nfssvc_nfsd;
3275 loaded = 1;
3276 break;
3277
3278 case MOD_UNLOAD:
3279 if (newnfs_numnfsd != 0) {
3280 error = EBUSY;
3281 break;
3282 }
3283
3284 #ifdef VV_DISABLEDELEG
3285 vn_deleg_ops.vndeleg_recall = NULL;
3286 vn_deleg_ops.vndeleg_disable = NULL;
3287 #endif
3288 nfsd_call_servertimer = NULL;
3289 nfsd_call_nfsd = NULL;
3290
3291 /* Clean out all NFSv4 state. */
3292 nfsrv_throwawayallstate(curthread);
3293
3294 /* Clean the NFS server reply cache */
3295 nfsrvd_cleancache();
3296
3297 /* Free up the krpc server pool. */
3298 if (nfsrvd_pool != NULL)
3299 svcpool_destroy(nfsrvd_pool);
3300
3301 /* and get rid of the locks */
3302 mtx_destroy(&nfs_cache_mutex);
3303 mtx_destroy(&nfs_v4root_mutex);
3304 mtx_destroy(&nfsv4root_mnt.mnt_mtx);
3305 lockdestroy(&nfsv4root_mnt.mnt_explock);
3306 loaded = 0;
3307 break;
3308 default:
3309 error = EOPNOTSUPP;
3310 break;
3311 }
3312
3313 out:
3314 NFSEXITCODE(error);
3315 return (error);
3316 }
3317 static moduledata_t nfsd_mod = {
3318 "nfsd",
3319 nfsd_modevent,
3320 NULL,
3321 };
3322 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY);
3323
3324 /* So that loader and kldload(2) can find us, wherever we are.. */
3325 MODULE_VERSION(nfsd, 1);
3326 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1);
3327 MODULE_DEPEND(nfsd, nfslock, 1, 1, 1);
3328 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1);
3329 MODULE_DEPEND(nfsd, krpc, 1, 1, 1);
3330 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1);
3331
Cache object: 98c8afd03a98c40ff4a76851d584f45e
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