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: head/sys/fs/nfsserver/nfs_nfsdport.c 241561 2012-10-14 22:33:17Z rmacklem $");
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
51FEATURE(nfsd, "NFSv4 server");
52
53extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
54extern int nfsrv_useacl;
55extern int newnfs_numnfsd;
56extern struct mount nfsv4root_mnt;
57extern struct nfsrv_stablefirst nfsrv_stablefirst;
58extern void (*nfsd_call_servertimer)(void);
59extern SVCPOOL *nfsrvd_pool;
60extern struct nfsv4lock nfsd_suspend_lock;
61struct vfsoptlist nfsv4root_opt, nfsv4root_newopt;
62NFSDLOCKMUTEX;
63struct mtx nfs_cache_mutex;
64struct mtx nfs_v4root_mutex;
65struct nfsrvfh nfs_rootfh, nfs_pubfh;
66int nfs_pubfhset = 0, nfs_rootfhset = 0;
67struct proc *nfsd_master_proc = NULL;
68static pid_t nfsd_master_pid = (pid_t)-1;
69static char nfsd_master_comm[MAXCOMLEN + 1];
70static struct timeval nfsd_master_start;
71static uint32_t nfsv4_sysid = 0;
72
73static int nfssvc_srvcall(struct thread *, struct nfssvc_args *,
74 struct ucred *);
75
76int nfsrv_enable_crossmntpt = 1;
77static int nfs_commit_blks;
78static int nfs_commit_miss;
79extern int nfsrv_issuedelegs;
80extern int nfsrv_dolocallocks;
81
82SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW, 0, "New NFS server");
83SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW,
84 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points");
85SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks,
86 0, "");
87SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss,
88 0, "");
89SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW,
90 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations");
91SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW,
92 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files");
93
94#define MAX_REORDERED_RPC 16
95#define NUM_HEURISTIC 1031
96#define NHUSE_INIT 64
97#define NHUSE_INC 16
98#define NHUSE_MAX 2048
99
100static struct nfsheur {
101 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */
102 off_t nh_nextoff; /* next offset for sequential detection */
103 int nh_use; /* use count for selection */
104 int nh_seqcount; /* heuristic */
105} nfsheur[NUM_HEURISTIC];
106
107
108/*
109 * Heuristic to detect sequential operation.
110 */
111static struct nfsheur *
112nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp)
113{
114 struct nfsheur *nh;
115 int hi, try;
116
117 /* Locate best candidate. */
118 try = 32;
119 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC;
120 nh = &nfsheur[hi];
121 while (try--) {
122 if (nfsheur[hi].nh_vp == vp) {
123 nh = &nfsheur[hi];
124 break;
125 }
126 if (nfsheur[hi].nh_use > 0)
127 --nfsheur[hi].nh_use;
128 hi = (hi + 1) % NUM_HEURISTIC;
129 if (nfsheur[hi].nh_use < nh->nh_use)
130 nh = &nfsheur[hi];
131 }
132
133 /* Initialize hint if this is a new file. */
134 if (nh->nh_vp != vp) {
135 nh->nh_vp = vp;
136 nh->nh_nextoff = uio->uio_offset;
137 nh->nh_use = NHUSE_INIT;
138 if (uio->uio_offset == 0)
139 nh->nh_seqcount = 4;
140 else
141 nh->nh_seqcount = 1;
142 }
143
144 /* Calculate heuristic. */
145 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) ||
146 uio->uio_offset == nh->nh_nextoff) {
147 /* See comments in vfs_vnops.c:sequential_heuristic(). */
148 nh->nh_seqcount += howmany(uio->uio_resid, 16384);
149 if (nh->nh_seqcount > IO_SEQMAX)
150 nh->nh_seqcount = IO_SEQMAX;
151 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC *
152 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) {
153 /* Probably a reordered RPC, leave seqcount alone. */
154 } else if (nh->nh_seqcount > 1) {
155 nh->nh_seqcount /= 2;
156 } else {
157 nh->nh_seqcount = 0;
158 }
159 nh->nh_use += NHUSE_INC;
160 if (nh->nh_use > NHUSE_MAX)
161 nh->nh_use = NHUSE_MAX;
162 return (nh);
163}
164
165/*
166 * Get attributes into nfsvattr structure.
167 */
168int
169nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
170 struct thread *p, int vpislocked)
171{
172 int error, lockedit = 0;
173
174 if (vpislocked == 0) {
175 /*
176 * When vpislocked == 0, the vnode is either exclusively
177 * locked by this thread or not locked by this thread.
178 * As such, shared lock it, if not exclusively locked.
179 */
180 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) {
181 lockedit = 1;
182 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY);
183 }
184 }
185 error = VOP_GETATTR(vp, &nvap->na_vattr, cred);
186 if (lockedit != 0)
187 NFSVOPUNLOCK(vp, 0);
188
189 NFSEXITCODE(error);
190 return (error);
191}
192
193/*
194 * Get a file handle for a vnode.
195 */
196int
197nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p)
198{
199 int error;
200
201 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t));
202 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
203 error = VOP_VPTOFH(vp, &fhp->fh_fid);
204
205 NFSEXITCODE(error);
206 return (error);
207}
208
209/*
210 * Perform access checking for vnodes obtained from file handles that would
211 * refer to files already opened by a Unix client. You cannot just use
212 * vn_writechk() and VOP_ACCESSX() for two reasons.
213 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write
214 * case.
215 * 2 - The owner is to be given access irrespective of mode bits for some
216 * operations, so that processes that chmod after opening a file don't
217 * break.
218 */
219int
220nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred,
221 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked,
222 u_int32_t *supportedtypep)
223{
224 struct vattr vattr;
225 int error = 0, getret = 0;
226
227 if (vpislocked == 0) {
228 if (NFSVOPLOCK(vp, LK_SHARED) != 0) {
229 error = EPERM;
230 goto out;
231 }
232 }
233 if (accmode & VWRITE) {
234 /* Just vn_writechk() changed to check rdonly */
235 /*
236 * Disallow write attempts on read-only file systems;
237 * unless the file is a socket or a block or character
238 * device resident on the file system.
239 */
240 if (NFSVNO_EXRDONLY(exp) ||
241 (vp->v_mount->mnt_flag & MNT_RDONLY)) {
242 switch (vp->v_type) {
243 case VREG:
244 case VDIR:
245 case VLNK:
246 error = EROFS;
247 default:
248 break;
249 }
250 }
251 /*
252 * If there's shared text associated with
253 * the inode, try to free it up once. If
254 * we fail, we can't allow writing.
255 */
256 if (VOP_IS_TEXT(vp) && error == 0)
257 error = ETXTBSY;
258 }
259 if (error != 0) {
260 if (vpislocked == 0)
261 NFSVOPUNLOCK(vp, 0);
262 goto out;
263 }
264
265 /*
266 * Should the override still be applied when ACLs are enabled?
267 */
268 error = VOP_ACCESSX(vp, accmode, cred, p);
269 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) {
270 /*
271 * Try again with VEXPLICIT_DENY, to see if the test for
272 * deletion is supported.
273 */
274 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p);
275 if (error == 0) {
276 if (vp->v_type == VDIR) {
277 accmode &= ~(VDELETE | VDELETE_CHILD);
278 accmode |= VWRITE;
279 error = VOP_ACCESSX(vp, accmode, cred, p);
280 } else if (supportedtypep != NULL) {
281 *supportedtypep &= ~NFSACCESS_DELETE;
282 }
283 }
284 }
285
286 /*
287 * Allow certain operations for the owner (reads and writes
288 * on files that are already open).
289 */
290 if (override != NFSACCCHK_NOOVERRIDE &&
291 (error == EPERM || error == EACCES)) {
292 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT))
293 error = 0;
294 else if (override & NFSACCCHK_ALLOWOWNER) {
295 getret = VOP_GETATTR(vp, &vattr, cred);
296 if (getret == 0 && cred->cr_uid == vattr.va_uid)
297 error = 0;
298 }
299 }
300 if (vpislocked == 0)
301 NFSVOPUNLOCK(vp, 0);
302
303out:
304 NFSEXITCODE(error);
305 return (error);
306}
307
308/*
309 * Set attribute(s) vnop.
310 */
311int
312nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred,
313 struct thread *p, struct nfsexstuff *exp)
314{
315 int error;
316
317 error = VOP_SETATTR(vp, &nvap->na_vattr, cred);
318 NFSEXITCODE(error);
319 return (error);
320}
321
322/*
323 * Set up nameidata for a lookup() call and do it.
324 */
325int
326nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp,
327 struct vnode *dp, int islocked, struct nfsexstuff *exp, struct thread *p,
328 struct vnode **retdirp)
329{
330 struct componentname *cnp = &ndp->ni_cnd;
331 int i;
332 struct iovec aiov;
333 struct uio auio;
334 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen;
335 int error = 0, crossmnt;
336 char *cp;
337
338 *retdirp = NULL;
339 cnp->cn_nameptr = cnp->cn_pnbuf;
340 ndp->ni_strictrelative = 0;
341 /*
342 * Extract and set starting directory.
343 */
344 if (dp->v_type != VDIR) {
345 if (islocked)
346 vput(dp);
347 else
348 vrele(dp);
349 nfsvno_relpathbuf(ndp);
350 error = ENOTDIR;
351 goto out1;
352 }
353 if (islocked)
354 NFSVOPUNLOCK(dp, 0);
355 VREF(dp);
356 *retdirp = dp;
357 if (NFSVNO_EXRDONLY(exp))
358 cnp->cn_flags |= RDONLY;
359 ndp->ni_segflg = UIO_SYSSPACE;
360 crossmnt = 1;
361
362 if (nd->nd_flag & ND_PUBLOOKUP) {
363 ndp->ni_loopcnt = 0;
364 if (cnp->cn_pnbuf[0] == '/') {
365 vrele(dp);
366 /*
367 * Check for degenerate pathnames here, since lookup()
368 * panics on them.
369 */
370 for (i = 1; i < ndp->ni_pathlen; i++)
371 if (cnp->cn_pnbuf[i] != '/')
372 break;
373 if (i == ndp->ni_pathlen) {
374 error = NFSERR_ACCES;
375 goto out;
376 }
377 dp = rootvnode;
378 VREF(dp);
379 }
380 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) ||
381 (nd->nd_flag & ND_NFSV4) == 0) {
382 /*
383 * Only cross mount points for NFSv4 when doing a
384 * mount while traversing the file system above
385 * the mount point, unless nfsrv_enable_crossmntpt is set.
386 */
387 cnp->cn_flags |= NOCROSSMOUNT;
388 crossmnt = 0;
389 }
390
391 /*
392 * Initialize for scan, set ni_startdir and bump ref on dp again
393 * becuase lookup() will dereference ni_startdir.
394 */
395
396 cnp->cn_thread = p;
397 ndp->ni_startdir = dp;
398 ndp->ni_rootdir = rootvnode;
399 ndp->ni_topdir = NULL;
400
401 if (!lockleaf)
402 cnp->cn_flags |= LOCKLEAF;
403 for (;;) {
404 cnp->cn_nameptr = cnp->cn_pnbuf;
405 /*
406 * Call lookup() to do the real work. If an error occurs,
407 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and
408 * we do not have to dereference anything before returning.
409 * In either case ni_startdir will be dereferenced and NULLed
410 * out.
411 */
412 error = lookup(ndp);
413 if (error)
414 break;
415
416 /*
417 * Check for encountering a symbolic link. Trivial
418 * termination occurs if no symlink encountered.
419 */
420 if ((cnp->cn_flags & ISSYMLINK) == 0) {
421 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0)
422 nfsvno_relpathbuf(ndp);
423 if (ndp->ni_vp && !lockleaf)
424 NFSVOPUNLOCK(ndp->ni_vp, 0);
425 break;
426 }
427
428 /*
429 * Validate symlink
430 */
431 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
432 NFSVOPUNLOCK(ndp->ni_dvp, 0);
433 if (!(nd->nd_flag & ND_PUBLOOKUP)) {
434 error = EINVAL;
435 goto badlink2;
436 }
437
438 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
439 error = ELOOP;
440 goto badlink2;
441 }
442 if (ndp->ni_pathlen > 1)
443 cp = uma_zalloc(namei_zone, M_WAITOK);
444 else
445 cp = cnp->cn_pnbuf;
446 aiov.iov_base = cp;
447 aiov.iov_len = MAXPATHLEN;
448 auio.uio_iov = &aiov;
449 auio.uio_iovcnt = 1;
450 auio.uio_offset = 0;
451 auio.uio_rw = UIO_READ;
452 auio.uio_segflg = UIO_SYSSPACE;
453 auio.uio_td = NULL;
454 auio.uio_resid = MAXPATHLEN;
455 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
456 if (error) {
457 badlink1:
458 if (ndp->ni_pathlen > 1)
459 uma_zfree(namei_zone, cp);
460 badlink2:
461 vrele(ndp->ni_dvp);
462 vput(ndp->ni_vp);
463 break;
464 }
465 linklen = MAXPATHLEN - auio.uio_resid;
466 if (linklen == 0) {
467 error = ENOENT;
468 goto badlink1;
469 }
470 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
471 error = ENAMETOOLONG;
472 goto badlink1;
473 }
474
475 /*
476 * Adjust or replace path
477 */
478 if (ndp->ni_pathlen > 1) {
479 NFSBCOPY(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
480 uma_zfree(namei_zone, cnp->cn_pnbuf);
481 cnp->cn_pnbuf = cp;
482 } else
483 cnp->cn_pnbuf[linklen] = '\0';
484 ndp->ni_pathlen += linklen;
485
486 /*
487 * Cleanup refs for next loop and check if root directory
488 * should replace current directory. Normally ni_dvp
489 * becomes the new base directory and is cleaned up when
490 * we loop. Explicitly null pointers after invalidation
491 * to clarify operation.
492 */
493 vput(ndp->ni_vp);
494 ndp->ni_vp = NULL;
495
496 if (cnp->cn_pnbuf[0] == '/') {
497 vrele(ndp->ni_dvp);
498 ndp->ni_dvp = ndp->ni_rootdir;
499 VREF(ndp->ni_dvp);
500 }
501 ndp->ni_startdir = ndp->ni_dvp;
502 ndp->ni_dvp = NULL;
503 }
504 if (!lockleaf)
505 cnp->cn_flags &= ~LOCKLEAF;
506
507out:
508 if (error) {
509 nfsvno_relpathbuf(ndp);
510 ndp->ni_vp = NULL;
511 ndp->ni_dvp = NULL;
512 ndp->ni_startdir = NULL;
513 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) {
514 ndp->ni_dvp = NULL;
515 }
516
517out1:
518 NFSEXITCODE2(error, nd);
519 return (error);
520}
521
522/*
523 * Set up a pathname buffer and return a pointer to it and, optionally
524 * set a hash pointer.
525 */
526void
527nfsvno_setpathbuf(struct nameidata *ndp, char **bufpp, u_long **hashpp)
528{
529 struct componentname *cnp = &ndp->ni_cnd;
530
531 cnp->cn_flags |= (NOMACCHECK | HASBUF);
532 cnp->cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK);
533 if (hashpp != NULL)
534 *hashpp = NULL;
535 *bufpp = cnp->cn_pnbuf;
536}
537
538/*
539 * Release the above path buffer, if not released by nfsvno_namei().
540 */
541void
542nfsvno_relpathbuf(struct nameidata *ndp)
543{
544
545 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0)
546 panic("nfsrelpath");
547 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf);
548 ndp->ni_cnd.cn_flags &= ~HASBUF;
549}
550
551/*
552 * Readlink vnode op into an mbuf list.
553 */
554int
555nfsvno_readlink(struct vnode *vp, struct ucred *cred, struct thread *p,
556 struct mbuf **mpp, struct mbuf **mpendp, int *lenp)
557{
558 struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
559 struct iovec *ivp = iv;
560 struct uio io, *uiop = &io;
561 struct mbuf *mp, *mp2 = NULL, *mp3 = NULL;
562 int i, len, tlen, error = 0;
563
564 len = 0;
565 i = 0;
566 while (len < NFS_MAXPATHLEN) {
567 NFSMGET(mp);
568 MCLGET(mp, M_WAIT);
569 mp->m_len = NFSMSIZ(mp);
570 if (len == 0) {
571 mp3 = mp2 = mp;
572 } else {
573 mp2->m_next = mp;
574 mp2 = mp;
575 }
576 if ((len + mp->m_len) > NFS_MAXPATHLEN) {
577 mp->m_len = NFS_MAXPATHLEN - len;
578 len = NFS_MAXPATHLEN;
579 } else {
580 len += mp->m_len;
581 }
582 ivp->iov_base = mtod(mp, caddr_t);
583 ivp->iov_len = mp->m_len;
584 i++;
585 ivp++;
586 }
587 uiop->uio_iov = iv;
588 uiop->uio_iovcnt = i;
589 uiop->uio_offset = 0;
590 uiop->uio_resid = len;
591 uiop->uio_rw = UIO_READ;
592 uiop->uio_segflg = UIO_SYSSPACE;
593 uiop->uio_td = NULL;
594 error = VOP_READLINK(vp, uiop, cred);
595 if (error) {
596 m_freem(mp3);
597 *lenp = 0;
598 goto out;
599 }
600 if (uiop->uio_resid > 0) {
601 len -= uiop->uio_resid;
602 tlen = NFSM_RNDUP(len);
603 nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, tlen - len);
604 }
605 *lenp = len;
606 *mpp = mp3;
607 *mpendp = mp;
608
609out:
610 NFSEXITCODE(error);
611 return (error);
612}
613
614/*
615 * Read vnode op call into mbuf list.
616 */
617int
618nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred,
619 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp)
620{
621 struct mbuf *m;
622 int i;
623 struct iovec *iv;
624 struct iovec *iv2;
625 int error = 0, len, left, siz, tlen, ioflag = 0;
626 struct mbuf *m2 = NULL, *m3;
627 struct uio io, *uiop = &io;
628 struct nfsheur *nh;
629
630 len = left = NFSM_RNDUP(cnt);
631 m3 = NULL;
632 /*
633 * Generate the mbuf list with the uio_iov ref. to it.
634 */
635 i = 0;
636 while (left > 0) {
637 NFSMGET(m);
638 MCLGET(m, M_WAIT);
639 m->m_len = 0;
640 siz = min(M_TRAILINGSPACE(m), left);
641 left -= siz;
642 i++;
643 if (m3)
644 m2->m_next = m;
645 else
646 m3 = m;
647 m2 = m;
648 }
649 MALLOC(iv, struct iovec *, i * sizeof (struct iovec),
650 M_TEMP, M_WAITOK);
651 uiop->uio_iov = iv2 = iv;
652 m = m3;
653 left = len;
654 i = 0;
655 while (left > 0) {
656 if (m == NULL)
657 panic("nfsvno_read iov");
658 siz = min(M_TRAILINGSPACE(m), left);
659 if (siz > 0) {
660 iv->iov_base = mtod(m, caddr_t) + m->m_len;
661 iv->iov_len = siz;
662 m->m_len += siz;
663 left -= siz;
664 iv++;
665 i++;
666 }
667 m = m->m_next;
668 }
669 uiop->uio_iovcnt = i;
670 uiop->uio_offset = off;
671 uiop->uio_resid = len;
672 uiop->uio_rw = UIO_READ;
673 uiop->uio_segflg = UIO_SYSSPACE;
674 nh = nfsrv_sequential_heuristic(uiop, vp);
675 ioflag |= nh->nh_seqcount << IO_SEQSHIFT;
676 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred);
677 FREE((caddr_t)iv2, M_TEMP);
678 if (error) {
679 m_freem(m3);
680 *mpp = NULL;
681 goto out;
682 }
683 nh->nh_nextoff = uiop->uio_offset;
684 tlen = len - uiop->uio_resid;
685 cnt = cnt < tlen ? cnt : tlen;
686 tlen = NFSM_RNDUP(cnt);
687 if (tlen == 0) {
688 m_freem(m3);
689 m3 = NULL;
690 } else if (len != tlen || tlen != cnt)
691 nfsrv_adj(m3, len - tlen, tlen - cnt);
692 *mpp = m3;
693 *mpendp = m2;
694
695out:
696 NFSEXITCODE(error);
697 return (error);
698}
699
700/*
701 * Write vnode op from an mbuf list.
702 */
703int
704nfsvno_write(struct vnode *vp, off_t off, int retlen, int cnt, int stable,
705 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p)
706{
707 struct iovec *ivp;
708 int i, len;
709 struct iovec *iv;
710 int ioflags, error;
711 struct uio io, *uiop = &io;
712 struct nfsheur *nh;
713
714 MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP,
715 M_WAITOK);
716 uiop->uio_iov = iv = ivp;
717 uiop->uio_iovcnt = cnt;
718 i = mtod(mp, caddr_t) + mp->m_len - cp;
719 len = retlen;
720 while (len > 0) {
721 if (mp == NULL)
722 panic("nfsvno_write");
723 if (i > 0) {
724 i = min(i, len);
725 ivp->iov_base = cp;
726 ivp->iov_len = i;
727 ivp++;
728 len -= i;
729 }
730 mp = mp->m_next;
731 if (mp) {
732 i = mp->m_len;
733 cp = mtod(mp, caddr_t);
734 }
735 }
736
737 if (stable == NFSWRITE_UNSTABLE)
738 ioflags = IO_NODELOCKED;
739 else
740 ioflags = (IO_SYNC | IO_NODELOCKED);
741 uiop->uio_resid = retlen;
742 uiop->uio_rw = UIO_WRITE;
743 uiop->uio_segflg = UIO_SYSSPACE;
744 NFSUIOPROC(uiop, p);
745 uiop->uio_offset = off;
746 nh = nfsrv_sequential_heuristic(uiop, vp);
747 ioflags |= nh->nh_seqcount << IO_SEQSHIFT;
748 error = VOP_WRITE(vp, uiop, ioflags, cred);
749 if (error == 0)
750 nh->nh_nextoff = uiop->uio_offset;
751 FREE((caddr_t)iv, M_TEMP);
752
753 NFSEXITCODE(error);
754 return (error);
755}
756
757/*
758 * Common code for creating a regular file (plus special files for V2).
759 */
760int
761nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp,
762 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp,
763 int32_t *cverf, NFSDEV_T rdev, struct thread *p, struct nfsexstuff *exp)
764{
765 u_quad_t tempsize;
766 int error;
767
768 error = nd->nd_repstat;
769 if (!error && ndp->ni_vp == NULL) {
770 if (nvap->na_type == VREG || nvap->na_type == VSOCK) {
771 vrele(ndp->ni_startdir);
772 error = VOP_CREATE(ndp->ni_dvp,
773 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
774 vput(ndp->ni_dvp);
775 nfsvno_relpathbuf(ndp);
776 if (!error) {
777 if (*exclusive_flagp) {
778 *exclusive_flagp = 0;
779 NFSVNO_ATTRINIT(nvap);
780 nvap->na_atime.tv_sec = cverf[0];
781 nvap->na_atime.tv_nsec = cverf[1];
782 error = VOP_SETATTR(ndp->ni_vp,
783 &nvap->na_vattr, nd->nd_cred);
784 }
785 }
786 /*
787 * NFS V2 Only. nfsrvd_mknod() does this for V3.
788 * (This implies, just get out on an error.)
789 */
790 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK ||
791 nvap->na_type == VFIFO) {
792 if (nvap->na_type == VCHR && rdev == 0xffffffff)
793 nvap->na_type = VFIFO;
794 if (nvap->na_type != VFIFO &&
795 (error = priv_check_cred(nd->nd_cred,
796 PRIV_VFS_MKNOD_DEV, 0))) {
797 vrele(ndp->ni_startdir);
798 nfsvno_relpathbuf(ndp);
799 vput(ndp->ni_dvp);
800 goto out;
801 }
802 nvap->na_rdev = rdev;
803 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
804 &ndp->ni_cnd, &nvap->na_vattr);
805 vput(ndp->ni_dvp);
806 nfsvno_relpathbuf(ndp);
807 vrele(ndp->ni_startdir);
808 if (error)
809 goto out;
810 } else {
811 vrele(ndp->ni_startdir);
812 nfsvno_relpathbuf(ndp);
813 vput(ndp->ni_dvp);
814 error = ENXIO;
815 goto out;
816 }
817 *vpp = ndp->ni_vp;
818 } else {
819 /*
820 * Handle cases where error is already set and/or
821 * the file exists.
822 * 1 - clean up the lookup
823 * 2 - iff !error and na_size set, truncate it
824 */
825 vrele(ndp->ni_startdir);
826 nfsvno_relpathbuf(ndp);
827 *vpp = ndp->ni_vp;
828 if (ndp->ni_dvp == *vpp)
829 vrele(ndp->ni_dvp);
830 else
831 vput(ndp->ni_dvp);
832 if (!error && nvap->na_size != VNOVAL) {
833 error = nfsvno_accchk(*vpp, VWRITE,
834 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
835 NFSACCCHK_VPISLOCKED, NULL);
836 if (!error) {
837 tempsize = nvap->na_size;
838 NFSVNO_ATTRINIT(nvap);
839 nvap->na_size = tempsize;
840 error = VOP_SETATTR(*vpp,
841 &nvap->na_vattr, nd->nd_cred);
842 }
843 }
844 if (error)
845 vput(*vpp);
846 }
847
848out:
849 NFSEXITCODE(error);
850 return (error);
851}
852
853/*
854 * Do a mknod vnode op.
855 */
856int
857nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred,
858 struct thread *p)
859{
860 int error = 0;
861 enum vtype vtyp;
862
863 vtyp = nvap->na_type;
864 /*
865 * Iff doesn't exist, create it.
866 */
867 if (ndp->ni_vp) {
868 vrele(ndp->ni_startdir);
869 nfsvno_relpathbuf(ndp);
870 vput(ndp->ni_dvp);
871 vrele(ndp->ni_vp);
872 error = EEXIST;
873 goto out;
874 }
875 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
876 vrele(ndp->ni_startdir);
877 nfsvno_relpathbuf(ndp);
878 vput(ndp->ni_dvp);
879 error = NFSERR_BADTYPE;
880 goto out;
881 }
882 if (vtyp == VSOCK) {
883 vrele(ndp->ni_startdir);
884 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp,
885 &ndp->ni_cnd, &nvap->na_vattr);
886 vput(ndp->ni_dvp);
887 nfsvno_relpathbuf(ndp);
888 } else {
889 if (nvap->na_type != VFIFO &&
890 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, 0))) {
891 vrele(ndp->ni_startdir);
892 nfsvno_relpathbuf(ndp);
893 vput(ndp->ni_dvp);
894 goto out;
895 }
896 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp,
897 &ndp->ni_cnd, &nvap->na_vattr);
898 vput(ndp->ni_dvp);
899 nfsvno_relpathbuf(ndp);
900 vrele(ndp->ni_startdir);
901 /*
902 * Since VOP_MKNOD returns the ni_vp, I can't
903 * see any reason to do the lookup.
904 */
905 }
906
907out:
908 NFSEXITCODE(error);
909 return (error);
910}
911
912/*
913 * Mkdir vnode op.
914 */
915int
916nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid,
917 struct ucred *cred, struct thread *p, struct nfsexstuff *exp)
918{
919 int error = 0;
920
921 if (ndp->ni_vp != NULL) {
922 if (ndp->ni_dvp == ndp->ni_vp)
923 vrele(ndp->ni_dvp);
924 else
925 vput(ndp->ni_dvp);
926 vrele(ndp->ni_vp);
927 nfsvno_relpathbuf(ndp);
928 error = EEXIST;
929 goto out;
930 }
931 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
932 &nvap->na_vattr);
933 vput(ndp->ni_dvp);
934 nfsvno_relpathbuf(ndp);
935
936out:
937 NFSEXITCODE(error);
938 return (error);
939}
940
941/*
942 * symlink vnode op.
943 */
944int
945nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp,
946 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p,
947 struct nfsexstuff *exp)
948{
949 int error = 0;
950
951 if (ndp->ni_vp) {
952 vrele(ndp->ni_startdir);
953 nfsvno_relpathbuf(ndp);
954 if (ndp->ni_dvp == ndp->ni_vp)
955 vrele(ndp->ni_dvp);
956 else
957 vput(ndp->ni_dvp);
958 vrele(ndp->ni_vp);
959 error = EEXIST;
960 goto out;
961 }
962
963 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd,
964 &nvap->na_vattr, pathcp);
965 vput(ndp->ni_dvp);
966 vrele(ndp->ni_startdir);
967 nfsvno_relpathbuf(ndp);
968 /*
969 * Although FreeBSD still had the lookup code in
970 * it for 7/current, there doesn't seem to be any
971 * point, since VOP_SYMLINK() returns the ni_vp.
972 * Just vput it for v2.
973 */
974 if (!not_v2 && !error)
975 vput(ndp->ni_vp);
976
977out:
978 NFSEXITCODE(error);
979 return (error);
980}
981
982/*
983 * Parse symbolic link arguments.
984 * This function has an ugly side effect. It will MALLOC() an area for
985 * the symlink and set iov_base to point to it, only if it succeeds.
986 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must
987 * be FREE'd later.
988 */
989int
990nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap,
991 struct thread *p, char **pathcpp, int *lenp)
992{
993 u_int32_t *tl;
994 char *pathcp = NULL;
995 int error = 0, len;
996 struct nfsv2_sattr *sp;
997
998 *pathcpp = NULL;
999 *lenp = 0;
1000 if ((nd->nd_flag & ND_NFSV3) &&
1001 (error = nfsrv_sattr(nd, nvap, NULL, NULL, p)))
1002 goto nfsmout;
1003 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
1004 len = fxdr_unsigned(int, *tl);
1005 if (len > NFS_MAXPATHLEN || len <= 0) {
1006 error = EBADRPC;
1007 goto nfsmout;
1008 }
1009 MALLOC(pathcp, caddr_t, len + 1, M_TEMP, M_WAITOK);
1010 error = nfsrv_mtostr(nd, pathcp, len);
1011 if (error)
1012 goto nfsmout;
1013 if (nd->nd_flag & ND_NFSV2) {
1014 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1015 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode);
1016 }
1017 *pathcpp = pathcp;
1018 *lenp = len;
1019 NFSEXITCODE2(0, nd);
1020 return (0);
1021nfsmout:
1022 if (pathcp)
1023 free(pathcp, M_TEMP);
1024 NFSEXITCODE2(error, nd);
1025 return (error);
1026}
1027
1028/*
1029 * Remove a non-directory object.
1030 */
1031int
1032nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred,
1033 struct thread *p, struct nfsexstuff *exp)
1034{
1035 struct vnode *vp;
1036 int error = 0;
1037
1038 vp = ndp->ni_vp;
1039 if (vp->v_type == VDIR)
1040 error = NFSERR_ISDIR;
1041 else if (is_v4)
1042 error = nfsrv_checkremove(vp, 1, p);
1043 if (!error)
1044 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd);
1045 if (ndp->ni_dvp == vp)
1046 vrele(ndp->ni_dvp);
1047 else
1048 vput(ndp->ni_dvp);
1049 vput(vp);
1050 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0)
1051 nfsvno_relpathbuf(ndp);
1052 NFSEXITCODE(error);
1053 return (error);
1054}
1055
1056/*
1057 * Remove a directory.
1058 */
1059int
1060nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred,
1061 struct thread *p, struct nfsexstuff *exp)
1062{
1063 struct vnode *vp;
1064 int error = 0;
1065
1066 vp = ndp->ni_vp;
1067 if (vp->v_type != VDIR) {
1068 error = ENOTDIR;
1069 goto out;
1070 }
1071 /*
1072 * No rmdir "." please.
1073 */
1074 if (ndp->ni_dvp == vp) {
1075 error = EINVAL;
1076 goto out;
1077 }
1078 /*
1079 * The root of a mounted filesystem cannot be deleted.
1080 */
1081 if (vp->v_vflag & VV_ROOT)
1082 error = EBUSY;
1083out:
1084 if (!error)
1085 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd);
1086 if (ndp->ni_dvp == vp)
1087 vrele(ndp->ni_dvp);
1088 else
1089 vput(ndp->ni_dvp);
1090 vput(vp);
1091 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0)
1092 nfsvno_relpathbuf(ndp);
1093 NFSEXITCODE(error);
1094 return (error);
1095}
1096
1097/*
1098 * Rename vnode op.
1099 */
1100int
1101nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp,
1102 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p)
1103{
1104 struct vnode *fvp, *tvp, *tdvp;
1105 int error = 0;
1106
1107 fvp = fromndp->ni_vp;
1108 if (ndstat) {
1109 vrele(fromndp->ni_dvp);
1110 vrele(fvp);
1111 error = ndstat;
1112 goto out1;
1113 }
1114 tdvp = tondp->ni_dvp;
1115 tvp = tondp->ni_vp;
1116 if (tvp != NULL) {
1117 if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
1118 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST;
1119 goto out;
1120 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
1121 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST;
1122 goto out;
1123 }
1124 if (tvp->v_type == VDIR && tvp->v_mountedhere) {
1125 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1126 goto out;
1127 }
1128
1129 /*
1130 * A rename to '.' or '..' results in a prematurely
1131 * unlocked vnode on FreeBSD5, so I'm just going to fail that
1132 * here.
1133 */
1134 if ((tondp->ni_cnd.cn_namelen == 1 &&
1135 tondp->ni_cnd.cn_nameptr[0] == '.') ||
1136 (tondp->ni_cnd.cn_namelen == 2 &&
1137 tondp->ni_cnd.cn_nameptr[0] == '.' &&
1138 tondp->ni_cnd.cn_nameptr[1] == '.')) {
1139 error = EINVAL;
1140 goto out;
1141 }
1142 }
1143 if (fvp->v_type == VDIR && fvp->v_mountedhere) {
1144 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1145 goto out;
1146 }
1147 if (fvp->v_mount != tdvp->v_mount) {
1148 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV;
1149 goto out;
1150 }
1151 if (fvp == tdvp) {
1152 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL;
1153 goto out;
1154 }
1155 if (fvp == tvp) {
1156 /*
1157 * If source and destination are the same, there is nothing to
1158 * do. Set error to -1 to indicate this.
1159 */
1160 error = -1;
1161 goto out;
1162 }
1163 if (ndflag & ND_NFSV4) {
1164 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) {
1165 error = nfsrv_checkremove(fvp, 0, p);
1166 NFSVOPUNLOCK(fvp, 0);
1167 } else
1168 error = EPERM;
1169 if (tvp && !error)
1170 error = nfsrv_checkremove(tvp, 1, p);
1171 } else {
1172 /*
1173 * For NFSv2 and NFSv3, try to get rid of the delegation, so
1174 * that the NFSv4 client won't be confused by the rename.
1175 * Since nfsd_recalldelegation() can only be called on an
1176 * unlocked vnode at this point and fvp is the file that will
1177 * still exist after the rename, just do fvp.
1178 */
1179 nfsd_recalldelegation(fvp, p);
1180 }
1181out:
1182 if (!error) {
1183 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp,
1184 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp,
1185 &tondp->ni_cnd);
1186 } else {
1187 if (tdvp == tvp)
1188 vrele(tdvp);
1189 else
1190 vput(tdvp);
1191 if (tvp)
1192 vput(tvp);
1193 vrele(fromndp->ni_dvp);
1194 vrele(fvp);
1195 if (error == -1)
1196 error = 0;
1197 }
1198 vrele(tondp->ni_startdir);
1199 nfsvno_relpathbuf(tondp);
1200out1:
1201 vrele(fromndp->ni_startdir);
1202 nfsvno_relpathbuf(fromndp);
1203 NFSEXITCODE(error);
1204 return (error);
1205}
1206
1207/*
1208 * Link vnode op.
1209 */
1210int
1211nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred,
1212 struct thread *p, struct nfsexstuff *exp)
1213{
1214 struct vnode *xp;
1215 int error = 0;
1216
1217 xp = ndp->ni_vp;
1218 if (xp != NULL) {
1219 error = EEXIST;
1220 } else {
1221 xp = ndp->ni_dvp;
1222 if (vp->v_mount != xp->v_mount)
1223 error = EXDEV;
1224 }
1225 if (!error) {
1226 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
1227 if ((vp->v_iflag & VI_DOOMED) == 0)
1228 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd);
1229 else
1230 error = EPERM;
1231 if (ndp->ni_dvp == vp)
1232 vrele(ndp->ni_dvp);
1233 else
1234 vput(ndp->ni_dvp);
1235 NFSVOPUNLOCK(vp, 0);
1236 } else {
1237 if (ndp->ni_dvp == ndp->ni_vp)
1238 vrele(ndp->ni_dvp);
1239 else
1240 vput(ndp->ni_dvp);
1241 if (ndp->ni_vp)
1242 vrele(ndp->ni_vp);
1243 }
1244 nfsvno_relpathbuf(ndp);
1245 NFSEXITCODE(error);
1246 return (error);
1247}
1248
1249/*
1250 * Do the fsync() appropriate for the commit.
1251 */
1252int
1253nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred,
1254 struct thread *td)
1255{
1256 int error = 0;
1257
1258 /*
1259 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of
1260 * file is done. At this time VOP_FSYNC does not accept offset and
1261 * byte count parameters so call VOP_FSYNC the whole file for now.
1262 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3.
1263 */
1264 if (cnt == 0 || cnt > MAX_COMMIT_COUNT) {
1265 /*
1266 * Give up and do the whole thing
1267 */
1268 if (vp->v_object &&
1269 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
1270 VM_OBJECT_LOCK(vp->v_object);
1271 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC);
1272 VM_OBJECT_UNLOCK(vp->v_object);
1273 }
1274 error = VOP_FSYNC(vp, MNT_WAIT, td);
1275 } else {
1276 /*
1277 * Locate and synchronously write any buffers that fall
1278 * into the requested range. Note: we are assuming that
1279 * f_iosize is a power of 2.
1280 */
1281 int iosize = vp->v_mount->mnt_stat.f_iosize;
1282 int iomask = iosize - 1;
1283 struct bufobj *bo;
1284 daddr_t lblkno;
1285
1286 /*
1287 * Align to iosize boundry, super-align to page boundry.
1288 */
1289 if (off & iomask) {
1290 cnt += off & iomask;
1291 off &= ~(u_quad_t)iomask;
1292 }
1293 if (off & PAGE_MASK) {
1294 cnt += off & PAGE_MASK;
1295 off &= ~(u_quad_t)PAGE_MASK;
1296 }
1297 lblkno = off / iosize;
1298
1299 if (vp->v_object &&
1300 (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
1301 VM_OBJECT_LOCK(vp->v_object);
1302 vm_object_page_clean(vp->v_object, off, off + cnt,
1303 OBJPC_SYNC);
1304 VM_OBJECT_UNLOCK(vp->v_object);
1305 }
1306
1307 bo = &vp->v_bufobj;
1308 BO_LOCK(bo);
1309 while (cnt > 0) {
1310 struct buf *bp;
1311
1312 /*
1313 * If we have a buffer and it is marked B_DELWRI we
1314 * have to lock and write it. Otherwise the prior
1315 * write is assumed to have already been committed.
1316 *
1317 * gbincore() can return invalid buffers now so we
1318 * have to check that bit as well (though B_DELWRI
1319 * should not be set if B_INVAL is set there could be
1320 * a race here since we haven't locked the buffer).
1321 */
1322 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) {
1323 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL |
1324 LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) {
1325 BO_LOCK(bo);
1326 continue; /* retry */
1327 }
1328 if ((bp->b_flags & (B_DELWRI|B_INVAL)) ==
1329 B_DELWRI) {
1330 bremfree(bp);
1331 bp->b_flags &= ~B_ASYNC;
1332 bwrite(bp);
1333 ++nfs_commit_miss;
1334 } else
1335 BUF_UNLOCK(bp);
1336 BO_LOCK(bo);
1337 }
1338 ++nfs_commit_blks;
1339 if (cnt < iosize)
1340 break;
1341 cnt -= iosize;
1342 ++lblkno;
1343 }
1344 BO_UNLOCK(bo);
1345 }
1346 NFSEXITCODE(error);
1347 return (error);
1348}
1349
1350/*
1351 * Statfs vnode op.
1352 */
1353int
1354nfsvno_statfs(struct vnode *vp, struct statfs *sf)
1355{
1356 int error;
1357
1358 error = VFS_STATFS(vp->v_mount, sf);
1359 if (error == 0) {
1360 /*
1361 * Since NFS handles these values as unsigned on the
1362 * wire, there is no way to represent negative values,
1363 * so set them to 0. Without this, they will appear
1364 * to be very large positive values for clients like
1365 * Solaris10.
1366 */
1367 if (sf->f_bavail < 0)
1368 sf->f_bavail = 0;
1369 if (sf->f_ffree < 0)
1370 sf->f_ffree = 0;
1371 }
1372 NFSEXITCODE(error);
1373 return (error);
1374}
1375
1376/*
1377 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but
1378 * must handle nfsrv_opencheck() calls after any other access checks.
1379 */
1380void
1381nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp,
1382 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp,
1383 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create,
1384 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, struct thread *p,
1385 struct nfsexstuff *exp, struct vnode **vpp)
1386{
1387 struct vnode *vp = NULL;
1388 u_quad_t tempsize;
1389 struct nfsexstuff nes;
1390
1391 if (ndp->ni_vp == NULL)
1392 nd->nd_repstat = nfsrv_opencheck(clientid,
1393 stateidp, stp, NULL, nd, p, nd->nd_repstat);
1394 if (!nd->nd_repstat) {
1395 if (ndp->ni_vp == NULL) {
1396 vrele(ndp->ni_startdir);
1397 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp,
1398 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr);
1399 vput(ndp->ni_dvp);
1400 nfsvno_relpathbuf(ndp);
1401 if (!nd->nd_repstat) {
1402 if (*exclusive_flagp) {
1403 *exclusive_flagp = 0;
1404 NFSVNO_ATTRINIT(nvap);
1405 nvap->na_atime.tv_sec = cverf[0];
1406 nvap->na_atime.tv_nsec = cverf[1];
1407 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp,
1408 &nvap->na_vattr, cred);
1409 } else {
1410 nfsrv_fixattr(nd, ndp->ni_vp, nvap,
1411 aclp, p, attrbitp, exp);
1412 }
1413 }
1414 vp = ndp->ni_vp;
1415 } else {
1416 if (ndp->ni_startdir)
1417 vrele(ndp->ni_startdir);
1418 nfsvno_relpathbuf(ndp);
1419 vp = ndp->ni_vp;
1420 if (create == NFSV4OPEN_CREATE) {
1421 if (ndp->ni_dvp == vp)
1422 vrele(ndp->ni_dvp);
1423 else
1424 vput(ndp->ni_dvp);
1425 }
1426 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) {
1427 if (ndp->ni_cnd.cn_flags & RDONLY)
1428 NFSVNO_SETEXRDONLY(&nes);
1429 else
1430 NFSVNO_EXINIT(&nes);
1431 nd->nd_repstat = nfsvno_accchk(vp,
1432 VWRITE, cred, &nes, p,
1433 NFSACCCHK_NOOVERRIDE,
1434 NFSACCCHK_VPISLOCKED, NULL);
1435 nd->nd_repstat = nfsrv_opencheck(clientid,
1436 stateidp, stp, vp, nd, p, nd->nd_repstat);
1437 if (!nd->nd_repstat) {
1438 tempsize = nvap->na_size;
1439 NFSVNO_ATTRINIT(nvap);
1440 nvap->na_size = tempsize;
1441 nd->nd_repstat = VOP_SETATTR(vp,
1442 &nvap->na_vattr, cred);
1443 }
1444 } else if (vp->v_type == VREG) {
1445 nd->nd_repstat = nfsrv_opencheck(clientid,
1446 stateidp, stp, vp, nd, p, nd->nd_repstat);
1447 }
1448 }
1449 } else {
1450 if (ndp->ni_cnd.cn_flags & HASBUF)
1451 nfsvno_relpathbuf(ndp);
1452 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) {
1453 vrele(ndp->ni_startdir);
1454 if (ndp->ni_dvp == ndp->ni_vp)
1455 vrele(ndp->ni_dvp);
1456 else
1457 vput(ndp->ni_dvp);
1458 if (ndp->ni_vp)
1459 vput(ndp->ni_vp);
1460 }
1461 }
1462 *vpp = vp;
1463
1464 NFSEXITCODE2(0, nd);
1465}
1466
1467/*
1468 * Updates the file rev and sets the mtime and ctime
1469 * to the current clock time, returning the va_filerev and va_Xtime
1470 * values.
1471 */
1472void
1473nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap,
1474 struct ucred *cred, struct thread *p)
1475{
1476 struct vattr va;
1477
1478 VATTR_NULL(&va);
1479 getnanotime(&va.va_mtime);
1480 (void) VOP_SETATTR(vp, &va, cred);
1481 (void) nfsvno_getattr(vp, nvap, cred, p, 1);
1482}
1483
1484/*
1485 * Glue routine to nfsv4_fillattr().
1486 */
1487int
1488nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp,
1489 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp,
1490 struct ucred *cred, struct thread *p, int isdgram, int reterr,
1491 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno)
1492{
1493 int error;
1494
1495 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror,
1496 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root,
1497 mounted_on_fileno);
1498 NFSEXITCODE2(0, nd);
1499 return (error);
1500}
1501
1502/* Since the Readdir vnode ops vary, put the entire functions in here. */
1503/*
1504 * nfs readdir service
1505 * - mallocs what it thinks is enough to read
1506 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR
1507 * - calls VOP_READDIR()
1508 * - loops around building the reply
1509 * if the output generated exceeds count break out of loop
1510 * The NFSM_CLGET macro is used here so that the reply will be packed
1511 * tightly in mbuf clusters.
1512 * - it trims out records with d_fileno == 0
1513 * this doesn't matter for Unix clients, but they might confuse clients
1514 * for other os'.
1515 * - it trims out records with d_type == DT_WHT
1516 * these cannot be seen through NFS (unless we extend the protocol)
1517 * The alternate call nfsrvd_readdirplus() does lookups as well.
1518 * PS: The NFS protocol spec. does not clarify what the "count" byte
1519 * argument is a count of.. just name strings and file id's or the
1520 * entire reply rpc or ...
1521 * I tried just file name and id sizes and it confused the Sun client,
1522 * so I am using the full rpc size now. The "paranoia.." comment refers
1523 * to including the status longwords that are not a part of the dir.
1524 * "entry" structures, but are in the rpc.
1525 */
1526int
1527nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram,
1528 struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
1529{
1530 struct dirent *dp;
1531 u_int32_t *tl;
1532 int dirlen;
1533 char *cpos, *cend, *rbuf;
1534 struct nfsvattr at;
1535 int nlen, error = 0, getret = 1;
1536 int siz, cnt, fullsiz, eofflag, ncookies;
1537 u_int64_t off, toff, verf;
1538 u_long *cookies = NULL, *cookiep;
1539 struct uio io;
1540 struct iovec iv;
1541 int not_zfs;
1542
1543 if (nd->nd_repstat) {
1544 nfsrv_postopattr(nd, getret, &at);
1545 goto out;
1546 }
1547 if (nd->nd_flag & ND_NFSV2) {
1548 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1549 off = fxdr_unsigned(u_quad_t, *tl++);
1550 } else {
1551 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1552 off = fxdr_hyper(tl);
1553 tl += 2;
1554 verf = fxdr_hyper(tl);
1555 tl += 2;
1556 }
1557 toff = off;
1558 cnt = fxdr_unsigned(int, *tl);
1559 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0)
1560 cnt = NFS_SRVMAXDATA(nd);
1561 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
1562 fullsiz = siz;
1563 if (nd->nd_flag & ND_NFSV3) {
1564 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred,
1565 p, 1);
1566#if 0
1567 /*
1568 * va_filerev is not sufficient as a cookie verifier,
1569 * since it is not supposed to change when entries are
1570 * removed/added unless that offset cookies returned to
1571 * the client are no longer valid.
1572 */
1573 if (!nd->nd_repstat && toff && verf != at.na_filerev)
1574 nd->nd_repstat = NFSERR_BAD_COOKIE;
1575#endif
1576 }
1577 if (nd->nd_repstat == 0 && cnt == 0) {
1578 if (nd->nd_flag & ND_NFSV2)
1579 /* NFSv2 does not have NFSERR_TOOSMALL */
1580 nd->nd_repstat = EPERM;
1581 else
1582 nd->nd_repstat = NFSERR_TOOSMALL;
1583 }
1584 if (!nd->nd_repstat)
1585 nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
1586 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
1587 NFSACCCHK_VPISLOCKED, NULL);
1588 if (nd->nd_repstat) {
1589 vput(vp);
1590 if (nd->nd_flag & ND_NFSV3)
1591 nfsrv_postopattr(nd, getret, &at);
1592 goto out;
1593 }
1594 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs");
1595 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
1596again:
1597 eofflag = 0;
1598 if (cookies) {
1599 free((caddr_t)cookies, M_TEMP);
1600 cookies = NULL;
1601 }
1602
1603 iv.iov_base = rbuf;
1604 iv.iov_len = siz;
1605 io.uio_iov = &iv;
1606 io.uio_iovcnt = 1;
1607 io.uio_offset = (off_t)off;
1608 io.uio_resid = siz;
1609 io.uio_segflg = UIO_SYSSPACE;
1610 io.uio_rw = UIO_READ;
1611 io.uio_td = NULL;
1612 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
1613 &cookies);
1614 off = (u_int64_t)io.uio_offset;
1615 if (io.uio_resid)
1616 siz -= io.uio_resid;
1617
1618 if (!cookies && !nd->nd_repstat)
1619 nd->nd_repstat = NFSERR_PERM;
1620 if (nd->nd_flag & ND_NFSV3) {
1621 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
1622 if (!nd->nd_repstat)
1623 nd->nd_repstat = getret;
1624 }
1625
1626 /*
1627 * Handles the failed cases. nd->nd_repstat == 0 past here.
1628 */
1629 if (nd->nd_repstat) {
1630 vput(vp);
1631 free((caddr_t)rbuf, M_TEMP);
1632 if (cookies)
1633 free((caddr_t)cookies, M_TEMP);
1634 if (nd->nd_flag & ND_NFSV3)
1635 nfsrv_postopattr(nd, getret, &at);
1636 goto out;
1637 }
1638 /*
1639 * If nothing read, return eof
1640 * rpc reply
1641 */
1642 if (siz == 0) {
1643 vput(vp);
1644 if (nd->nd_flag & ND_NFSV2) {
1645 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1646 } else {
1647 nfsrv_postopattr(nd, getret, &at);
1648 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1649 txdr_hyper(at.na_filerev, tl);
1650 tl += 2;
1651 }
1652 *tl++ = newnfs_false;
1653 *tl = newnfs_true;
1654 FREE((caddr_t)rbuf, M_TEMP);
1655 FREE((caddr_t)cookies, M_TEMP);
1656 goto out;
1657 }
1658
1659 /*
1660 * Check for degenerate cases of nothing useful read.
1661 * If so go try again
1662 */
1663 cpos = rbuf;
1664 cend = rbuf + siz;
1665 dp = (struct dirent *)cpos;
1666 cookiep = cookies;
1667
1668 /*
1669 * For some reason FreeBSD's ufs_readdir() chooses to back the
1670 * directory offset up to a block boundary, so it is necessary to
1671 * skip over the records that precede the requested offset. This
1672 * requires the assumption that file offset cookies monotonically
1673 * increase.
1674 * Since the offset cookies don't monotonically increase for ZFS,
1675 * this is not done when ZFS is the file system.
1676 */
1677 while (cpos < cend && ncookies > 0 &&
1678 (dp->d_fileno == 0 || dp->d_type == DT_WHT ||
1679 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff))) {
1680 cpos += dp->d_reclen;
1681 dp = (struct dirent *)cpos;
1682 cookiep++;
1683 ncookies--;
1684 }
1685 if (cpos >= cend || ncookies == 0) {
1686 siz = fullsiz;
1687 toff = off;
1688 goto again;
1689 }
1690 vput(vp);
1691
1692 /*
1693 * dirlen is the size of the reply, including all XDR and must
1694 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate
1695 * if the XDR should be included in "count", but to be safe, we do.
1696 * (Include the two booleans at the end of the reply in dirlen now.)
1697 */
1698 if (nd->nd_flag & ND_NFSV3) {
1699 nfsrv_postopattr(nd, getret, &at);
1700 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1701 txdr_hyper(at.na_filerev, tl);
1702 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
1703 } else {
1704 dirlen = 2 * NFSX_UNSIGNED;
1705 }
1706
1707 /* Loop through the records and build reply */
1708 while (cpos < cend && ncookies > 0) {
1709 nlen = dp->d_namlen;
1710 if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
1711 nlen <= NFS_MAXNAMLEN) {
1712 if (nd->nd_flag & ND_NFSV3)
1713 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
1714 else
1715 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen));
1716 if (dirlen > cnt) {
1717 eofflag = 0;
1718 break;
1719 }
1720
1721 /*
1722 * Build the directory record xdr from
1723 * the dirent entry.
1724 */
1725 if (nd->nd_flag & ND_NFSV3) {
1726 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1727 *tl++ = newnfs_true;
1728 *tl++ = 0;
1729 } else {
1730 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1731 *tl++ = newnfs_true;
1732 }
1733 *tl = txdr_unsigned(dp->d_fileno);
1734 (void) nfsm_strtom(nd, dp->d_name, nlen);
1735 if (nd->nd_flag & ND_NFSV3) {
1736 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1737 *tl++ = 0;
1738 } else
1739 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
1740 *tl = txdr_unsigned(*cookiep);
1741 }
1742 cpos += dp->d_reclen;
1743 dp = (struct dirent *)cpos;
1744 cookiep++;
1745 ncookies--;
1746 }
1747 if (cpos < cend)
1748 eofflag = 0;
1749 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1750 *tl++ = newnfs_false;
1751 if (eofflag)
1752 *tl = newnfs_true;
1753 else
1754 *tl = newnfs_false;
1755 FREE((caddr_t)rbuf, M_TEMP);
1756 FREE((caddr_t)cookies, M_TEMP);
1757
1758out:
1759 NFSEXITCODE2(0, nd);
1760 return (0);
1761nfsmout:
1762 vput(vp);
1763 NFSEXITCODE2(error, nd);
1764 return (error);
1765}
1766
1767/*
1768 * Readdirplus for V3 and Readdir for V4.
1769 */
1770int
1771nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram,
1772 struct vnode *vp, struct thread *p, struct nfsexstuff *exp)
1773{
1774 struct dirent *dp;
1775 u_int32_t *tl;
1776 int dirlen;
1777 char *cpos, *cend, *rbuf;
1778 struct vnode *nvp;
1779 fhandle_t nfh;
1780 struct nfsvattr nva, at, *nvap = &nva;
1781 struct mbuf *mb0, *mb1;
1782 struct nfsreferral *refp;
1783 int nlen, r, error = 0, getret = 1, usevget = 1;
1784 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt;
1785 caddr_t bpos0, bpos1;
1786 u_int64_t off, toff, verf;
1787 u_long *cookies = NULL, *cookiep;
1788 nfsattrbit_t attrbits, rderrbits, savbits;
1789 struct uio io;
1790 struct iovec iv;
1791 struct componentname cn;
1792 int at_root, needs_unbusy, not_zfs, supports_nfsv4acls;
1793 struct mount *mp, *new_mp;
1794 uint64_t mounted_on_fileno;
1795
1796 if (nd->nd_repstat) {
1797 nfsrv_postopattr(nd, getret, &at);
1798 goto out;
1799 }
1800 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
1801 off = fxdr_hyper(tl);
1802 toff = off;
1803 tl += 2;
1804 verf = fxdr_hyper(tl);
1805 tl += 2;
1806 siz = fxdr_unsigned(int, *tl++);
1807 cnt = fxdr_unsigned(int, *tl);
1808
1809 /*
1810 * Use the server's maximum data transfer size as the upper bound
1811 * on reply datalen.
1812 */
1813 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0)
1814 cnt = NFS_SRVMAXDATA(nd);
1815
1816 /*
1817 * siz is a "hint" of how much directory information (name, fileid,
1818 * cookie) should be in the reply. At least one client "hints" 0,
1819 * so I set it to cnt for that case. I also round it up to the
1820 * next multiple of DIRBLKSIZ.
1821 */
1822 if (siz <= 0)
1823 siz = cnt;
1824 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
1825
1826 if (nd->nd_flag & ND_NFSV4) {
1827 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
1828 if (error)
1829 goto nfsmout;
1830 NFSSET_ATTRBIT(&savbits, &attrbits);
1831 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits);
1832 NFSZERO_ATTRBIT(&rderrbits);
1833 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR);
1834 } else {
1835 NFSZERO_ATTRBIT(&attrbits);
1836 }
1837 fullsiz = siz;
1838 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
1839 if (!nd->nd_repstat) {
1840 if (off && verf != at.na_filerev) {
1841 /*
1842 * va_filerev is not sufficient as a cookie verifier,
1843 * since it is not supposed to change when entries are
1844 * removed/added unless that offset cookies returned to
1845 * the client are no longer valid.
1846 */
1847#if 0
1848 if (nd->nd_flag & ND_NFSV4) {
1849 nd->nd_repstat = NFSERR_NOTSAME;
1850 } else {
1851 nd->nd_repstat = NFSERR_BAD_COOKIE;
1852 }
1853#endif
1854 } else if ((nd->nd_flag & ND_NFSV4) && off == 0 && verf != 0) {
1855 nd->nd_repstat = NFSERR_BAD_COOKIE;
1856 }
1857 }
1858 if (!nd->nd_repstat && vp->v_type != VDIR)
1859 nd->nd_repstat = NFSERR_NOTDIR;
1860 if (!nd->nd_repstat && cnt == 0)
1861 nd->nd_repstat = NFSERR_TOOSMALL;
1862 if (!nd->nd_repstat)
1863 nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
1864 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
1865 NFSACCCHK_VPISLOCKED, NULL);
1866 if (nd->nd_repstat) {
1867 vput(vp);
1868 if (nd->nd_flag & ND_NFSV3)
1869 nfsrv_postopattr(nd, getret, &at);
1870 goto out;
1871 }
1872 not_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs");
1873
1874 MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK);
1875again:
1876 eofflag = 0;
1877 if (cookies) {
1878 free((caddr_t)cookies, M_TEMP);
1879 cookies = NULL;
1880 }
1881
1882 iv.iov_base = rbuf;
1883 iv.iov_len = siz;
1884 io.uio_iov = &iv;
1885 io.uio_iovcnt = 1;
1886 io.uio_offset = (off_t)off;
1887 io.uio_resid = siz;
1888 io.uio_segflg = UIO_SYSSPACE;
1889 io.uio_rw = UIO_READ;
1890 io.uio_td = NULL;
1891 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies,
1892 &cookies);
1893 off = (u_int64_t)io.uio_offset;
1894 if (io.uio_resid)
1895 siz -= io.uio_resid;
1896
1897 getret = nfsvno_getattr(vp, &at, nd->nd_cred, p, 1);
1898
1899 if (!cookies && !nd->nd_repstat)
1900 nd->nd_repstat = NFSERR_PERM;
1901 if (!nd->nd_repstat)
1902 nd->nd_repstat = getret;
1903 if (nd->nd_repstat) {
1904 vput(vp);
1905 if (cookies)
1906 free((caddr_t)cookies, M_TEMP);
1907 free((caddr_t)rbuf, M_TEMP);
1908 if (nd->nd_flag & ND_NFSV3)
1909 nfsrv_postopattr(nd, getret, &at);
1910 goto out;
1911 }
1912 /*
1913 * If nothing read, return eof
1914 * rpc reply
1915 */
1916 if (siz == 0) {
1917 vput(vp);
1918 if (nd->nd_flag & ND_NFSV3)
1919 nfsrv_postopattr(nd, getret, &at);
1920 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1921 txdr_hyper(at.na_filerev, tl);
1922 tl += 2;
1923 *tl++ = newnfs_false;
1924 *tl = newnfs_true;
1925 free((caddr_t)cookies, M_TEMP);
1926 free((caddr_t)rbuf, M_TEMP);
1927 goto out;
1928 }
1929
1930 /*
1931 * Check for degenerate cases of nothing useful read.
1932 * If so go try again
1933 */
1934 cpos = rbuf;
1935 cend = rbuf + siz;
1936 dp = (struct dirent *)cpos;
1937 cookiep = cookies;
1938
1939 /*
1940 * For some reason FreeBSD's ufs_readdir() chooses to back the
1941 * directory offset up to a block boundary, so it is necessary to
1942 * skip over the records that precede the requested offset. This
1943 * requires the assumption that file offset cookies monotonically
1944 * increase.
1945 * Since the offset cookies don't monotonically increase for ZFS,
1946 * this is not done when ZFS is the file system.
1947 */
1948 while (cpos < cend && ncookies > 0 &&
1949 (dp->d_fileno == 0 || dp->d_type == DT_WHT ||
1950 (not_zfs != 0 && ((u_quad_t)(*cookiep)) <= toff) ||
1951 ((nd->nd_flag & ND_NFSV4) &&
1952 ((dp->d_namlen == 1 && dp->d_name[0] == '.') ||
1953 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) {
1954 cpos += dp->d_reclen;
1955 dp = (struct dirent *)cpos;
1956 cookiep++;
1957 ncookies--;
1958 }
1959 if (cpos >= cend || ncookies == 0) {
1960 siz = fullsiz;
1961 toff = off;
1962 goto again;
1963 }
1964
1965 /*
1966 * Busy the file system so that the mount point won't go away
1967 * and, as such, VFS_VGET() can be used safely.
1968 */
1969 mp = vp->v_mount;
1970 vfs_ref(mp);
1971 NFSVOPUNLOCK(vp, 0);
1972 nd->nd_repstat = vfs_busy(mp, 0);
1973 vfs_rel(mp);
1974 if (nd->nd_repstat != 0) {
1975 vrele(vp);
1976 free(cookies, M_TEMP);
1977 free(rbuf, M_TEMP);
1978 if (nd->nd_flag & ND_NFSV3)
1979 nfsrv_postopattr(nd, getret, &at);
1980 goto out;
1981 }
1982
1983 /*
1984 * Save this position, in case there is an error before one entry
1985 * is created.
1986 */
1987 mb0 = nd->nd_mb;
1988 bpos0 = nd->nd_bpos;
1989
1990 /*
1991 * Fill in the first part of the reply.
1992 * dirlen is the reply length in bytes and cannot exceed cnt.
1993 * (Include the two booleans at the end of the reply in dirlen now,
1994 * so we recognize when we have exceeded cnt.)
1995 */
1996 if (nd->nd_flag & ND_NFSV3) {
1997 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED;
1998 nfsrv_postopattr(nd, getret, &at);
1999 } else {
2000 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED;
2001 }
2002 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
2003 txdr_hyper(at.na_filerev, tl);
2004
2005 /*
2006 * Save this position, in case there is an empty reply needed.
2007 */
2008 mb1 = nd->nd_mb;
2009 bpos1 = nd->nd_bpos;
2010
2011 /* Loop through the records and build reply */
2012 entrycnt = 0;
2013 while (cpos < cend && ncookies > 0 && dirlen < cnt) {
2014 nlen = dp->d_namlen;
2015 if (dp->d_fileno != 0 && dp->d_type != DT_WHT &&
2016 nlen <= NFS_MAXNAMLEN &&
2017 ((nd->nd_flag & ND_NFSV3) || nlen > 2 ||
2018 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.'))
2019 || (nlen == 1 && dp->d_name[0] != '.'))) {
2020 /*
2021 * Save the current position in the reply, in case
2022 * this entry exceeds cnt.
2023 */
2024 mb1 = nd->nd_mb;
2025 bpos1 = nd->nd_bpos;
2026
2027 /*
2028 * For readdir_and_lookup get the vnode using
2029 * the file number.
2030 */
2031 nvp = NULL;
2032 refp = NULL;
2033 r = 0;
2034 at_root = 0;
2035 needs_unbusy = 0;
2036 new_mp = mp;
2037 mounted_on_fileno = (uint64_t)dp->d_fileno;
2038 if ((nd->nd_flag & ND_NFSV3) ||
2039 NFSNONZERO_ATTRBIT(&savbits)) {
2040 if (nd->nd_flag & ND_NFSV4)
2041 refp = nfsv4root_getreferral(NULL,
2042 vp, dp->d_fileno);
2043 if (refp == NULL) {
2044 if (usevget)
2045 r = VFS_VGET(mp, dp->d_fileno,
2046 LK_SHARED, &nvp);
2047 else
2048 r = EOPNOTSUPP;
2049 if (r == EOPNOTSUPP) {
2050 if (usevget) {
2051 usevget = 0;
2052 cn.cn_nameiop = LOOKUP;
2053 cn.cn_lkflags =
2054 LK_SHARED |
2055 LK_RETRY;
2056 cn.cn_cred =
2057 nd->nd_cred;
2058 cn.cn_thread = p;
2059 }
2060 cn.cn_nameptr = dp->d_name;
2061 cn.cn_namelen = nlen;
2062 cn.cn_flags = ISLASTCN |
2063 NOFOLLOW | LOCKLEAF |
2064 MPSAFE;
2065 if (nlen == 2 &&
2066 dp->d_name[0] == '.' &&
2067 dp->d_name[1] == '.')
2068 cn.cn_flags |=
2069 ISDOTDOT;
2070 if (NFSVOPLOCK(vp, LK_SHARED)
2071 != 0) {
2072 nd->nd_repstat = EPERM;
2073 break;
2074 }
2075 if ((vp->v_vflag & VV_ROOT) != 0
2076 && (cn.cn_flags & ISDOTDOT)
2077 != 0) {
2078 vref(vp);
2079 nvp = vp;
2080 r = 0;
2081 } else {
2082 r = VOP_LOOKUP(vp, &nvp,
2083 &cn);
2084 if (vp != nvp)
2085 NFSVOPUNLOCK(vp,
2086 0);
2087 }
2088 }
2089
2090 /*
2091 * For NFSv4, check to see if nvp is
2092 * a mount point and get the mount
2093 * point vnode, as required.
2094 */
2095 if (r == 0 &&
2096 nfsrv_enable_crossmntpt != 0 &&
2097 (nd->nd_flag & ND_NFSV4) != 0 &&
2098 nvp->v_type == VDIR &&
2099 nvp->v_mountedhere != NULL) {
2100 new_mp = nvp->v_mountedhere;
2101 r = vfs_busy(new_mp, 0);
2102 vput(nvp);
2103 nvp = NULL;
2104 if (r == 0) {
2105 r = VFS_ROOT(new_mp,
2106 LK_SHARED, &nvp);
2107 needs_unbusy = 1;
2108 if (r == 0)
2109 at_root = 1;
2110 }
2111 }
2112 }
2113 if (!r) {
2114 if (refp == NULL &&
2115 ((nd->nd_flag & ND_NFSV3) ||
2116 NFSNONZERO_ATTRBIT(&attrbits))) {
2117 r = nfsvno_getfh(nvp, &nfh, p);
2118 if (!r)
2119 r = nfsvno_getattr(nvp, nvap,
2120 nd->nd_cred, p, 1);
2121 }
2122 } else {
2123 nvp = NULL;
2124 }
2125 if (r) {
2126 if (!NFSISSET_ATTRBIT(&attrbits,
2127 NFSATTRBIT_RDATTRERROR)) {
2128 if (nvp != NULL)
2129 vput(nvp);
2130 if (needs_unbusy != 0)
2131 vfs_unbusy(new_mp);
2132 nd->nd_repstat = r;
2133 break;
2134 }
2135 }
2136 }
2137
2138 /*
2139 * Build the directory record xdr
2140 */
2141 if (nd->nd_flag & ND_NFSV3) {
2142 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2143 *tl++ = newnfs_true;
2144 *tl++ = 0;
2145 *tl = txdr_unsigned(dp->d_fileno);
2146 dirlen += nfsm_strtom(nd, dp->d_name, nlen);
2147 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2148 *tl++ = 0;
2149 *tl = txdr_unsigned(*cookiep);
2150 nfsrv_postopattr(nd, 0, nvap);
2151 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1);
2152 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR);
2153 if (nvp != NULL)
2154 vput(nvp);
2155 } else {
2156 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2157 *tl++ = newnfs_true;
2158 *tl++ = 0;
2159 *tl = txdr_unsigned(*cookiep);
2160 dirlen += nfsm_strtom(nd, dp->d_name, nlen);
2161 if (nvp != NULL) {
2162 supports_nfsv4acls =
2163 nfs_supportsnfsv4acls(nvp);
2164 NFSVOPUNLOCK(nvp, 0);
2165 } else
2166 supports_nfsv4acls = 0;
2167 if (refp != NULL) {
2168 dirlen += nfsrv_putreferralattr(nd,
2169 &savbits, refp, 0,
2170 &nd->nd_repstat);
2171 if (nd->nd_repstat) {
2172 if (nvp != NULL)
2173 vrele(nvp);
2174 if (needs_unbusy != 0)
2175 vfs_unbusy(new_mp);
2176 break;
2177 }
2178 } else if (r) {
2179 dirlen += nfsvno_fillattr(nd, new_mp,
2180 nvp, nvap, &nfh, r, &rderrbits,
2181 nd->nd_cred, p, isdgram, 0,
2182 supports_nfsv4acls, at_root,
2183 mounted_on_fileno);
2184 } else {
2185 dirlen += nfsvno_fillattr(nd, new_mp,
2186 nvp, nvap, &nfh, r, &attrbits,
2187 nd->nd_cred, p, isdgram, 0,
2188 supports_nfsv4acls, at_root,
2189 mounted_on_fileno);
2190 }
2191 if (nvp != NULL)
2192 vrele(nvp);
2193 dirlen += (3 * NFSX_UNSIGNED);
2194 }
2195 if (needs_unbusy != 0)
2196 vfs_unbusy(new_mp);
2197 if (dirlen <= cnt)
2198 entrycnt++;
2199 }
2200 cpos += dp->d_reclen;
2201 dp = (struct dirent *)cpos;
2202 cookiep++;
2203 ncookies--;
2204 }
2205 vrele(vp);
2206 vfs_unbusy(mp);
2207
2208 /*
2209 * If dirlen > cnt, we must strip off the last entry. If that
2210 * results in an empty reply, report NFSERR_TOOSMALL.
2211 */
2212 if (dirlen > cnt || nd->nd_repstat) {
2213 if (!nd->nd_repstat && entrycnt == 0)
2214 nd->nd_repstat = NFSERR_TOOSMALL;
2215 if (nd->nd_repstat)
2216 newnfs_trimtrailing(nd, mb0, bpos0);
2217 else
2218 newnfs_trimtrailing(nd, mb1, bpos1);
2219 eofflag = 0;
2220 } else if (cpos < cend)
2221 eofflag = 0;
2222 if (!nd->nd_repstat) {
2223 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2224 *tl++ = newnfs_false;
2225 if (eofflag)
2226 *tl = newnfs_true;
2227 else
2228 *tl = newnfs_false;
2229 }
2230 FREE((caddr_t)cookies, M_TEMP);
2231 FREE((caddr_t)rbuf, M_TEMP);
2232
2233out:
2234 NFSEXITCODE2(0, nd);
2235 return (0);
2236nfsmout:
2237 vput(vp);
2238 NFSEXITCODE2(error, nd);
2239 return (error);
2240}
2241
2242/*
2243 * Get the settable attributes out of the mbuf list.
2244 * (Return 0 or EBADRPC)
2245 */
2246int
2247nfsrv_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap,
2248 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
2249{
2250 u_int32_t *tl;
2251 struct nfsv2_sattr *sp;
2252 struct timeval curtime;
2253 int error = 0, toclient = 0;
2254
2255 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) {
2256 case ND_NFSV2:
2257 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2258 /*
2259 * Some old clients didn't fill in the high order 16bits.
2260 * --> check the low order 2 bytes for 0xffff
2261 */
2262 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
2263 nvap->na_mode = nfstov_mode(sp->sa_mode);
2264 if (sp->sa_uid != newnfs_xdrneg1)
2265 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid);
2266 if (sp->sa_gid != newnfs_xdrneg1)
2267 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid);
2268 if (sp->sa_size != newnfs_xdrneg1)
2269 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size);
2270 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) {
2271#ifdef notyet
2272 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime);
2273#else
2274 nvap->na_atime.tv_sec =
2275 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec);
2276 nvap->na_atime.tv_nsec = 0;
2277#endif
2278 }
2279 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1)
2280 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime);
2281 break;
2282 case ND_NFSV3:
2283 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2284 if (*tl == newnfs_true) {
2285 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2286 nvap->na_mode = nfstov_mode(*tl);
2287 }
2288 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2289 if (*tl == newnfs_true) {
2290 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2291 nvap->na_uid = fxdr_unsigned(uid_t, *tl);
2292 }
2293 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2294 if (*tl == newnfs_true) {
2295 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2296 nvap->na_gid = fxdr_unsigned(gid_t, *tl);
2297 }
2298 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2299 if (*tl == newnfs_true) {
2300 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2301 nvap->na_size = fxdr_hyper(tl);
2302 }
2303 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2304 switch (fxdr_unsigned(int, *tl)) {
2305 case NFSV3SATTRTIME_TOCLIENT:
2306 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2307 fxdr_nfsv3time(tl, &nvap->na_atime);
2308 toclient = 1;
2309 break;
2310 case NFSV3SATTRTIME_TOSERVER:
2311 NFSGETTIME(&curtime);
2312 nvap->na_atime.tv_sec = curtime.tv_sec;
2313 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000;
2314 nvap->na_vaflags |= VA_UTIMES_NULL;
2315 break;
2316 };
2317 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2318 switch (fxdr_unsigned(int, *tl)) {
2319 case NFSV3SATTRTIME_TOCLIENT:
2320 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2321 fxdr_nfsv3time(tl, &nvap->na_mtime);
2322 nvap->na_vaflags &= ~VA_UTIMES_NULL;
2323 break;
2324 case NFSV3SATTRTIME_TOSERVER:
2325 NFSGETTIME(&curtime);
2326 nvap->na_mtime.tv_sec = curtime.tv_sec;
2327 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000;
2328 if (!toclient)
2329 nvap->na_vaflags |= VA_UTIMES_NULL;
2330 break;
2331 };
2332 break;
2333 case ND_NFSV4:
2334 error = nfsv4_sattr(nd, nvap, attrbitp, aclp, p);
2335 };
2336nfsmout:
2337 NFSEXITCODE2(error, nd);
2338 return (error);
2339}
2340
2341/*
2342 * Handle the setable attributes for V4.
2343 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise.
2344 */
2345int
2346nfsv4_sattr(struct nfsrv_descript *nd, struct nfsvattr *nvap,
2347 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p)
2348{
2349 u_int32_t *tl;
2350 int attrsum = 0;
2351 int i, j;
2352 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0;
2353 int toclient = 0;
2354 u_char *cp, namestr[NFSV4_SMALLSTR + 1];
2355 uid_t uid;
2356 gid_t gid;
2357 struct timeval curtime;
2358
2359 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup);
2360 if (error)
2361 goto nfsmout;
2362 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2363 attrsize = fxdr_unsigned(int, *tl);
2364
2365 /*
2366 * Loop around getting the setable attributes. If an unsupported
2367 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return.
2368 */
2369 if (retnotsup) {
2370 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2371 bitpos = NFSATTRBIT_MAX;
2372 } else {
2373 bitpos = 0;
2374 }
2375 for (; bitpos < NFSATTRBIT_MAX; bitpos++) {
2376 if (attrsum > attrsize) {
2377 error = NFSERR_BADXDR;
2378 goto nfsmout;
2379 }
2380 if (NFSISSET_ATTRBIT(attrbitp, bitpos))
2381 switch (bitpos) {
2382 case NFSATTRBIT_SIZE:
2383 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
2384 nvap->na_size = fxdr_hyper(tl);
2385 attrsum += NFSX_HYPER;
2386 break;
2387 case NFSATTRBIT_ACL:
2388 error = nfsrv_dissectacl(nd, aclp, &aceerr, &aclsize,
2389 p);
2390 if (error)
2391 goto nfsmout;
2392 if (aceerr && !nd->nd_repstat)
2393 nd->nd_repstat = aceerr;
2394 attrsum += aclsize;
2395 break;
2396 case NFSATTRBIT_ARCHIVE:
2397 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2398 if (!nd->nd_repstat)
2399 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2400 attrsum += NFSX_UNSIGNED;
2401 break;
2402 case NFSATTRBIT_HIDDEN:
2403 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2404 if (!nd->nd_repstat)
2405 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2406 attrsum += NFSX_UNSIGNED;
2407 break;
2408 case NFSATTRBIT_MIMETYPE:
2409 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2410 i = fxdr_unsigned(int, *tl);
2411 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
2412 if (error)
2413 goto nfsmout;
2414 if (!nd->nd_repstat)
2415 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2416 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i));
2417 break;
2418 case NFSATTRBIT_MODE:
2419 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2420 nvap->na_mode = nfstov_mode(*tl);
2421 attrsum += NFSX_UNSIGNED;
2422 break;
2423 case NFSATTRBIT_OWNER:
2424 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2425 j = fxdr_unsigned(int, *tl);
2426 if (j < 0) {
2427 error = NFSERR_BADXDR;
2428 goto nfsmout;
2429 }
2430 if (j > NFSV4_SMALLSTR)
2431 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
2432 else
2433 cp = namestr;
2434 error = nfsrv_mtostr(nd, cp, j);
2435 if (error) {
2436 if (j > NFSV4_SMALLSTR)
2437 free(cp, M_NFSSTRING);
2438 goto nfsmout;
2439 }
2440 if (!nd->nd_repstat) {
2441 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, &uid,
2442 p);
2443 if (!nd->nd_repstat)
2444 nvap->na_uid = uid;
2445 }
2446 if (j > NFSV4_SMALLSTR)
2447 free(cp, M_NFSSTRING);
2448 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
2449 break;
2450 case NFSATTRBIT_OWNERGROUP:
2451 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2452 j = fxdr_unsigned(int, *tl);
2453 if (j < 0) {
2454 error = NFSERR_BADXDR;
2455 goto nfsmout;
2456 }
2457 if (j > NFSV4_SMALLSTR)
2458 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK);
2459 else
2460 cp = namestr;
2461 error = nfsrv_mtostr(nd, cp, j);
2462 if (error) {
2463 if (j > NFSV4_SMALLSTR)
2464 free(cp, M_NFSSTRING);
2465 goto nfsmout;
2466 }
2467 if (!nd->nd_repstat) {
2468 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, &gid,
2469 p);
2470 if (!nd->nd_repstat)
2471 nvap->na_gid = gid;
2472 }
2473 if (j > NFSV4_SMALLSTR)
2474 free(cp, M_NFSSTRING);
2475 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j));
2476 break;
2477 case NFSATTRBIT_SYSTEM:
2478 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2479 if (!nd->nd_repstat)
2480 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2481 attrsum += NFSX_UNSIGNED;
2482 break;
2483 case NFSATTRBIT_TIMEACCESSSET:
2484 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2485 attrsum += NFSX_UNSIGNED;
2486 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
2487 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2488 fxdr_nfsv4time(tl, &nvap->na_atime);
2489 toclient = 1;
2490 attrsum += NFSX_V4TIME;
2491 } else {
2492 NFSGETTIME(&curtime);
2493 nvap->na_atime.tv_sec = curtime.tv_sec;
2494 nvap->na_atime.tv_nsec = curtime.tv_usec * 1000;
2495 nvap->na_vaflags |= VA_UTIMES_NULL;
2496 }
2497 break;
2498 case NFSATTRBIT_TIMEBACKUP:
2499 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2500 if (!nd->nd_repstat)
2501 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2502 attrsum += NFSX_V4TIME;
2503 break;
2504 case NFSATTRBIT_TIMECREATE:
2505 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2506 if (!nd->nd_repstat)
2507 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2508 attrsum += NFSX_V4TIME;
2509 break;
2510 case NFSATTRBIT_TIMEMODIFYSET:
2511 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2512 attrsum += NFSX_UNSIGNED;
2513 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) {
2514 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME);
2515 fxdr_nfsv4time(tl, &nvap->na_mtime);
2516 nvap->na_vaflags &= ~VA_UTIMES_NULL;
2517 attrsum += NFSX_V4TIME;
2518 } else {
2519 NFSGETTIME(&curtime);
2520 nvap->na_mtime.tv_sec = curtime.tv_sec;
2521 nvap->na_mtime.tv_nsec = curtime.tv_usec * 1000;
2522 if (!toclient)
2523 nvap->na_vaflags |= VA_UTIMES_NULL;
2524 }
2525 break;
2526 default:
2527 nd->nd_repstat = NFSERR_ATTRNOTSUPP;
2528 /*
2529 * set bitpos so we drop out of the loop.
2530 */
2531 bitpos = NFSATTRBIT_MAX;
2532 break;
2533 };
2534 }
2535
2536 /*
2537 * some clients pad the attrlist, so we need to skip over the
2538 * padding.
2539 */
2540 if (attrsum > attrsize) {
2541 error = NFSERR_BADXDR;
2542 } else {
2543 attrsize = NFSM_RNDUP(attrsize);
2544 if (attrsum < attrsize)
2545 error = nfsm_advance(nd, attrsize - attrsum, -1);
2546 }
2547nfsmout:
2548 NFSEXITCODE2(error, nd);
2549 return (error);
2550}
2551
2552/*
2553 * Check/setup export credentials.
2554 */
2555int
2556nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp,
2557 struct ucred *credanon)
2558{
2559 int error = 0;
2560
2561 /*
2562 * Check/setup credentials.
2563 */
2564 if (nd->nd_flag & ND_GSS)
2565 exp->nes_exflag &= ~MNT_EXPORTANON;
2566
2567 /*
2568 * Check to see if the operation is allowed for this security flavor.
2569 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to
2570 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS.
2571 * Also, allow Secinfo, so that it can acquire the correct flavor(s).
2572 */
2573 if (nfsvno_testexp(nd, exp) &&
2574 nd->nd_procnum != NFSV4OP_SECINFO &&
2575 nd->nd_procnum != NFSPROC_FSINFO) {
2576 if (nd->nd_flag & ND_NFSV4)
2577 error = NFSERR_WRONGSEC;
2578 else
2579 error = (NFSERR_AUTHERR | AUTH_TOOWEAK);
2580 goto out;
2581 }
2582
2583 /*
2584 * Check to see if the file system is exported V4 only.
2585 */
2586 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) {
2587 error = NFSERR_PROGNOTV4;
2588 goto out;
2589 }
2590
2591 /*
2592 * Now, map the user credentials.
2593 * (Note that ND_AUTHNONE will only be set for an NFSv3
2594 * Fsinfo RPC. If set for anything else, this code might need
2595 * to change.)
2596 */
2597 if (NFSVNO_EXPORTED(exp) &&
2598 ((!(nd->nd_flag & ND_GSS) && nd->nd_cred->cr_uid == 0) ||
2599 NFSVNO_EXPORTANON(exp) ||
2600 (nd->nd_flag & ND_AUTHNONE))) {
2601 nd->nd_cred->cr_uid = credanon->cr_uid;
2602 nd->nd_cred->cr_gid = credanon->cr_gid;
2603 crsetgroups(nd->nd_cred, credanon->cr_ngroups,
2604 credanon->cr_groups);
2605 }
2606
2607out:
2608 NFSEXITCODE2(error, nd);
2609 return (error);
2610}
2611
2612/*
2613 * Check exports.
2614 */
2615int
2616nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp,
2617 struct ucred **credp)
2618{
2619 int i, error, *secflavors;
2620
2621 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
2622 &exp->nes_numsecflavor, &secflavors);
2623 if (error) {
2624 if (nfs_rootfhset) {
2625 exp->nes_exflag = 0;
2626 exp->nes_numsecflavor = 0;
2627 error = 0;
2628 }
2629 } else {
2630 /* Copy the security flavors. */
2631 for (i = 0; i < exp->nes_numsecflavor; i++)
2632 exp->nes_secflavors[i] = secflavors[i];
2633 }
2634 NFSEXITCODE(error);
2635 return (error);
2636}
2637
2638/*
2639 * Get a vnode for a file handle and export stuff.
2640 */
2641int
2642nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam,
2643 int lktype, struct vnode **vpp, struct nfsexstuff *exp,
2644 struct ucred **credp)
2645{
2646 int i, error, *secflavors;
2647
2648 *credp = NULL;
2649 exp->nes_numsecflavor = 0;
2650 if (VFS_NEEDSGIANT(mp))
2651 error = ESTALE;
2652 else
2653 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp);
2654 if (error != 0)
2655 /* Make sure the server replies ESTALE to the client. */
2656 error = ESTALE;
2657 if (nam && !error) {
2658 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp,
2659 &exp->nes_numsecflavor, &secflavors);
2660 if (error) {
2661 if (nfs_rootfhset) {
2662 exp->nes_exflag = 0;
2663 exp->nes_numsecflavor = 0;
2664 error = 0;
2665 } else {
2666 vput(*vpp);
2667 }
2668 } else {
2669 /* Copy the security flavors. */
2670 for (i = 0; i < exp->nes_numsecflavor; i++)
2671 exp->nes_secflavors[i] = secflavors[i];
2672 }
2673 }
2674 NFSEXITCODE(error);
2675 return (error);
2676}
2677
2678/*
2679 * nfsd_fhtovp() - convert a fh to a vnode ptr
2680 * - look up fsid in mount list (if not found ret error)
2681 * - get vp and export rights by calling nfsvno_fhtovp()
2682 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
2683 * for AUTH_SYS
2684 * - if mpp != NULL, return the mount point so that it can
2685 * be used for vn_finished_write() by the caller
2686 */
2687void
2688nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype,
2689 struct vnode **vpp, struct nfsexstuff *exp,
2690 struct mount **mpp, int startwrite, struct thread *p)
2691{
2692 struct mount *mp;
2693 struct ucred *credanon;
2694 fhandle_t *fhp;
2695
2696 fhp = (fhandle_t *)nfp->nfsrvfh_data;
2697 /*
2698 * Check for the special case of the nfsv4root_fh.
2699 */
2700 mp = vfs_busyfs(&fhp->fh_fsid);
2701 if (mpp != NULL)
2702 *mpp = mp;
2703 if (mp == NULL) {
2704 *vpp = NULL;
2705 nd->nd_repstat = ESTALE;
2706 goto out;
2707 }
2708
2709 if (startwrite)
2710 vn_start_write(NULL, mpp, V_WAIT);
2711
2712 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp,
2713 &credanon);
2714 vfs_unbusy(mp);
2715
2716 /*
2717 * For NFSv4 without a pseudo root fs, unexported file handles
2718 * can be returned, so that Lookup works everywhere.
2719 */
2720 if (!nd->nd_repstat && exp->nes_exflag == 0 &&
2721 !(nd->nd_flag & ND_NFSV4)) {
2722 vput(*vpp);
2723 nd->nd_repstat = EACCES;
2724 }
2725
2726 /*
2727 * Personally, I've never seen any point in requiring a
2728 * reserved port#, since only in the rare case where the
2729 * clients are all boxes with secure system priviledges,
2730 * does it provide any enhanced security, but... some people
2731 * believe it to be useful and keep putting this code back in.
2732 * (There is also some "security checker" out there that
2733 * complains if the nfs server doesn't enforce this.)
2734 * However, note the following:
2735 * RFC3530 (NFSv4) specifies that a reserved port# not be
2736 * required.
2737 * RFC2623 recommends that, if a reserved port# is checked for,
2738 * that there be a way to turn that off--> ifdef'd.
2739 */
2740#ifdef NFS_REQRSVPORT
2741 if (!nd->nd_repstat) {
2742 struct sockaddr_in *saddr;
2743 struct sockaddr_in6 *saddr6;
2744
2745 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *);
2746 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *);
2747 if (!(nd->nd_flag & ND_NFSV4) &&
2748 ((saddr->sin_family == AF_INET &&
2749 ntohs(saddr->sin_port) >= IPPORT_RESERVED) ||
2750 (saddr6->sin6_family == AF_INET6 &&
2751 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) {
2752 vput(*vpp);
2753 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
2754 }
2755 }
2756#endif /* NFS_REQRSVPORT */
2757
2758 /*
2759 * Check/setup credentials.
2760 */
2761 if (!nd->nd_repstat) {
2762 nd->nd_saveduid = nd->nd_cred->cr_uid;
2763 nd->nd_repstat = nfsd_excred(nd, exp, credanon);
2764 if (nd->nd_repstat)
2765 vput(*vpp);
2766 }
2767 if (credanon != NULL)
2768 crfree(credanon);
2769 if (nd->nd_repstat) {
2770 if (startwrite)
2771 vn_finished_write(mp);
2772 *vpp = NULL;
2773 if (mpp != NULL)
2774 *mpp = NULL;
2775 }
2776
2777out:
2778 NFSEXITCODE2(0, nd);
2779}
2780
2781/*
2782 * glue for fp.
2783 */
2784int
2785fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp)
2786{
2787 struct filedesc *fdp;
2788 struct file *fp;
2789 int error = 0;
2790
2791 fdp = p->td_proc->p_fd;
2792 if (fd >= fdp->fd_nfiles ||
2793 (fp = fdp->fd_ofiles[fd]) == NULL) {
2794 error = EBADF;
2795 goto out;
2796 }
2797 *fpp = fp;
2798
2799out:
2800 NFSEXITCODE(error);
2801 return (error);
2802}
2803
2804/*
2805 * Called from nfssvc() to update the exports list. Just call
2806 * vfs_export(). This has to be done, since the v4 root fake fs isn't
2807 * in the mount list.
2808 */
2809int
2810nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p)
2811{
2812 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp;
2813 int error = 0;
2814 struct nameidata nd;
2815 fhandle_t fh;
2816
2817 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export);
2818 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0)
2819 nfs_rootfhset = 0;
2820 else if (error == 0) {
2821 if (nfsexargp->fspec == NULL) {
2822 error = EPERM;
2823 goto out;
2824 }
2825 /*
2826 * If fspec != NULL, this is the v4root path.
2827 */
2828 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_USERSPACE,
2829 nfsexargp->fspec, p);
2830 if ((error = namei(&nd)) != 0)
2831 goto out;
2832 error = nfsvno_getfh(nd.ni_vp, &fh, p);
2833 vrele(nd.ni_vp);
2834 if (!error) {
2835 nfs_rootfh.nfsrvfh_len = NFSX_MYFH;
2836 NFSBCOPY((caddr_t)&fh,
2837 nfs_rootfh.nfsrvfh_data,
2838 sizeof (fhandle_t));
2839 nfs_rootfhset = 1;
2840 }
2841 }
2842
2843out:
2844 NFSEXITCODE(error);
2845 return (error);
2846}
2847
2848/*
2849 * Get the tcp socket sequence numbers we need.
2850 * (Maybe this should be moved to the tcp sources?)
2851 */
2852int
2853nfsrv_getsocksndseq(struct socket *so, tcp_seq *maxp, tcp_seq *unap)
2854{
2855 struct inpcb *inp;
2856 struct tcpcb *tp;
2857 int error = 0;
2858
2859 inp = sotoinpcb(so);
2860 KASSERT(inp != NULL, ("nfsrv_getsocksndseq: inp == NULL"));
2861 INP_RLOCK(inp);
2862 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) {
2863 INP_RUNLOCK(inp);
2864 error = EPIPE;
2865 goto out;
2866 }
2867 tp = intotcpcb(inp);
2868 if (tp->t_state != TCPS_ESTABLISHED) {
2869 INP_RUNLOCK(inp);
2870 error = EPIPE;
2871 goto out;
2872 }
2873 *maxp = tp->snd_max;
2874 *unap = tp->snd_una;
2875 INP_RUNLOCK(inp);
2876
2877out:
2878 NFSEXITCODE(error);
2879 return (error);
2880}
2881
2882/*
2883 * This function needs to test to see if the system is near its limit
2884 * for memory allocation via malloc() or mget() and return True iff
2885 * either of these resources are near their limit.
2886 * XXX (For now, this is just a stub.)
2887 */
2888int nfsrv_testmalloclimit = 0;
2889int
2890nfsrv_mallocmget_limit(void)
2891{
2892 static int printmesg = 0;
2893 static int testval = 1;
2894
2895 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) {
2896 if ((printmesg++ % 100) == 0)
2897 printf("nfsd: malloc/mget near limit\n");
2898 return (1);
2899 }
2900 return (0);
2901}
2902
2903/*
2904 * BSD specific initialization of a mount point.
2905 */
2906void
2907nfsd_mntinit(void)
2908{
2909 static int inited = 0;
2910
2911 if (inited)
2912 return;
2913 inited = 1;
2914 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED);
2915 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist);
2916 TAILQ_INIT(&nfsv4root_mnt.mnt_activevnodelist);
2917 nfsv4root_mnt.mnt_export = NULL;
2918 TAILQ_INIT(&nfsv4root_opt);
2919 TAILQ_INIT(&nfsv4root_newopt);
2920 nfsv4root_mnt.mnt_opt = &nfsv4root_opt;
2921 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt;
2922 nfsv4root_mnt.mnt_nvnodelistsize = 0;
2923 nfsv4root_mnt.mnt_activevnodelistsize = 0;
2924}
2925
2926/*
2927 * Get a vnode for a file handle, without checking exports, etc.
2928 */
2929struct vnode *
2930nfsvno_getvp(fhandle_t *fhp)
2931{
2932 struct mount *mp;
2933 struct vnode *vp;
2934 int error;
2935
2936 mp = vfs_busyfs(&fhp->fh_fsid);
2937 if (mp == NULL)
2938 return (NULL);
2939 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp);
2940 vfs_unbusy(mp);
2941 if (error)
2942 return (NULL);
2943 return (vp);
2944}
2945
2946/*
2947 * Do a local VOP_ADVLOCK().
2948 */
2949int
2950nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first,
2951 u_int64_t end, struct thread *td)
2952{
2953 int error = 0;
2954 struct flock fl;
2955 u_int64_t tlen;
2956
2957 if (nfsrv_dolocallocks == 0)
2958 goto out;
2959
2960 /* Check for VI_DOOMED here, so that VOP_ADVLOCK() isn't performed. */
2961 if ((vp->v_iflag & VI_DOOMED) != 0) {
2962 error = EPERM;
2963 goto out;
2964 }
2965
2966 fl.l_whence = SEEK_SET;
2967 fl.l_type = ftype;
2968 fl.l_start = (off_t)first;
2969 if (end == NFS64BITSSET) {
2970 fl.l_len = 0;
2971 } else {
2972 tlen = end - first;
2973 fl.l_len = (off_t)tlen;
2974 }
2975 /*
2976 * For FreeBSD8, the l_pid and l_sysid must be set to the same
2977 * values for all calls, so that all locks will be held by the
2978 * nfsd server. (The nfsd server handles conflicts between the
2979 * various clients.)
2980 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024
2981 * bytes, so it can't be put in l_sysid.
2982 */
2983 if (nfsv4_sysid == 0)
2984 nfsv4_sysid = nlm_acquire_next_sysid();
2985 fl.l_pid = (pid_t)0;
2986 fl.l_sysid = (int)nfsv4_sysid;
2987
2988 NFSVOPUNLOCK(vp, 0);
2989 if (ftype == F_UNLCK)
2990 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl,
2991 (F_POSIX | F_REMOTE));
2992 else
2993 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl,
2994 (F_POSIX | F_REMOTE));
2995 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2996
2997out:
2998 NFSEXITCODE(error);
2999 return (error);
3000}
3001
3002/*
3003 * Check the nfsv4 root exports.
3004 */
3005int
3006nfsvno_v4rootexport(struct nfsrv_descript *nd)
3007{
3008 struct ucred *credanon;
3009 int exflags, error = 0, numsecflavor, *secflavors, i;
3010
3011 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags,
3012 &credanon, &numsecflavor, &secflavors);
3013 if (error) {
3014 error = NFSERR_PROGUNAVAIL;
3015 goto out;
3016 }
3017 if (credanon != NULL)
3018 crfree(credanon);
3019 for (i = 0; i < numsecflavor; i++) {
3020 if (secflavors[i] == AUTH_SYS)
3021 nd->nd_flag |= ND_EXAUTHSYS;
3022 else if (secflavors[i] == RPCSEC_GSS_KRB5)
3023 nd->nd_flag |= ND_EXGSS;
3024 else if (secflavors[i] == RPCSEC_GSS_KRB5I)
3025 nd->nd_flag |= ND_EXGSSINTEGRITY;
3026 else if (secflavors[i] == RPCSEC_GSS_KRB5P)
3027 nd->nd_flag |= ND_EXGSSPRIVACY;
3028 }
3029
3030out:
3031 NFSEXITCODE(error);
3032 return (error);
3033}
3034
3035/*
3036 * Nfs server psuedo system call for the nfsd's
3037 */
3038/*
3039 * MPSAFE
3040 */
3041static int
3042nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap)
3043{
3044 struct file *fp;
3045 struct nfsd_addsock_args sockarg;
3046 struct nfsd_nfsd_args nfsdarg;
3047 int error;
3048
3049 if (uap->flag & NFSSVC_NFSDADDSOCK) {
3050 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg));
3051 if (error)
3052 goto out;
3053 /*
3054 * Since we don't know what rights might be required,
3055 * pretend that we need them all. It is better to be too
3056 * careful than too reckless.
3057 */
3058 if ((error = fget(td, sockarg.sock, CAP_SOCK_ALL, &fp)) != 0)
3059 goto out;
3060 if (fp->f_type != DTYPE_SOCKET) {
3061 fdrop(fp, td);
3062 error = EPERM;
3063 goto out;
3064 }
3065 error = nfsrvd_addsock(fp);
3066 fdrop(fp, td);
3067 } else if (uap->flag & NFSSVC_NFSDNFSD) {
3068 if (uap->argp == NULL) {
3069 error = EINVAL;
3070 goto out;
3071 }
3072 error = copyin(uap->argp, (caddr_t)&nfsdarg,
3073 sizeof (nfsdarg));
3074 if (error)
3075 goto out;
3076 error = nfsrvd_nfsd(td, &nfsdarg);
3077 } else {
3078 error = nfssvc_srvcall(td, uap, td->td_ucred);
3079 }
3080
3081out:
3082 NFSEXITCODE(error);
3083 return (error);
3084}
3085
3086static int
3087nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
3088{
3089 struct nfsex_args export;
3090 struct file *fp = NULL;
3091 int stablefd, len;
3092 struct nfsd_clid adminrevoke;
3093 struct nfsd_dumplist dumplist;
3094 struct nfsd_dumpclients *dumpclients;
3095 struct nfsd_dumplocklist dumplocklist;
3096 struct nfsd_dumplocks *dumplocks;
3097 struct nameidata nd;
3098 vnode_t vp;
3099 int error = EINVAL, igotlock;
3100 struct proc *procp;
3101 static int suspend_nfsd = 0;
3102
3103 if (uap->flag & NFSSVC_PUBLICFH) {
3104 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data,
3105 sizeof (fhandle_t));
3106 error = copyin(uap->argp,
3107 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t));
3108 if (!error)
3109 nfs_pubfhset = 1;
3110 } else if (uap->flag & NFSSVC_V4ROOTEXPORT) {
3111 error = copyin(uap->argp,(caddr_t)&export,
3112 sizeof (struct nfsex_args));
3113 if (!error)
3114 error = nfsrv_v4rootexport(&export, cred, p);
3115 } else if (uap->flag & NFSSVC_NOPUBLICFH) {
3116 nfs_pubfhset = 0;
3117 error = 0;
3118 } else if (uap->flag & NFSSVC_STABLERESTART) {
3119 error = copyin(uap->argp, (caddr_t)&stablefd,
3120 sizeof (int));
3121 if (!error)
3122 error = fp_getfvp(p, stablefd, &fp, &vp);
3123 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE))
3124 error = EBADF;
3125 if (!error && newnfs_numnfsd != 0)
3126 error = EPERM;
3127 if (!error) {
3128 nfsrv_stablefirst.nsf_fp = fp;
3129 nfsrv_setupstable(p);
3130 }
3131 } else if (uap->flag & NFSSVC_ADMINREVOKE) {
3132 error = copyin(uap->argp, (caddr_t)&adminrevoke,
3133 sizeof (struct nfsd_clid));
3134 if (!error)
3135 error = nfsrv_adminrevoke(&adminrevoke, p);
3136 } else if (uap->flag & NFSSVC_DUMPCLIENTS) {
3137 error = copyin(uap->argp, (caddr_t)&dumplist,
3138 sizeof (struct nfsd_dumplist));
3139 if (!error && (dumplist.ndl_size < 1 ||
3140 dumplist.ndl_size > NFSRV_MAXDUMPLIST))
3141 error = EPERM;
3142 if (!error) {
3143 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size;
3144 dumpclients = (struct nfsd_dumpclients *)malloc(len,
3145 M_TEMP, M_WAITOK);
3146 nfsrv_dumpclients(dumpclients, dumplist.ndl_size);
3147 error = copyout(dumpclients,
3148 CAST_USER_ADDR_T(dumplist.ndl_list), len);
3149 free((caddr_t)dumpclients, M_TEMP);
3150 }
3151 } else if (uap->flag & NFSSVC_DUMPLOCKS) {
3152 error = copyin(uap->argp, (caddr_t)&dumplocklist,
3153 sizeof (struct nfsd_dumplocklist));
3154 if (!error && (dumplocklist.ndllck_size < 1 ||
3155 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST))
3156 error = EPERM;
3157 if (!error)
3158 error = nfsrv_lookupfilename(&nd,
3159 dumplocklist.ndllck_fname, p);
3160 if (!error) {
3161 len = sizeof (struct nfsd_dumplocks) *
3162 dumplocklist.ndllck_size;
3163 dumplocks = (struct nfsd_dumplocks *)malloc(len,
3164 M_TEMP, M_WAITOK);
3165 nfsrv_dumplocks(nd.ni_vp, dumplocks,
3166 dumplocklist.ndllck_size, p);
3167 vput(nd.ni_vp);
3168 error = copyout(dumplocks,
3169 CAST_USER_ADDR_T(dumplocklist.ndllck_list), len);
3170 free((caddr_t)dumplocks, M_TEMP);
3171 }
3172 } else if (uap->flag & NFSSVC_BACKUPSTABLE) {
3173 procp = p->td_proc;
3174 PROC_LOCK(procp);
3175 nfsd_master_pid = procp->p_pid;
3176 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1);
3177 nfsd_master_start = procp->p_stats->p_start;
3178 nfsd_master_proc = procp;
3179 PROC_UNLOCK(procp);
3180 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) {
3181 NFSLOCKV4ROOTMUTEX();
3182 if (suspend_nfsd == 0) {
3183 /* Lock out all nfsd threads */
3184 do {
3185 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1,
3186 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL);
3187 } while (igotlock == 0 && suspend_nfsd == 0);
3188 suspend_nfsd = 1;
3189 }
3190 NFSUNLOCKV4ROOTMUTEX();
3191 error = 0;
3192 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) {
3193 NFSLOCKV4ROOTMUTEX();
3194 if (suspend_nfsd != 0) {
3195 nfsv4_unlock(&nfsd_suspend_lock, 0);
3196 suspend_nfsd = 0;
3197 }
3198 NFSUNLOCKV4ROOTMUTEX();
3199 error = 0;
3200 }
3201
3202 NFSEXITCODE(error);
3203 return (error);
3204}
3205
3206/*
3207 * Check exports.
3208 * Returns 0 if ok, 1 otherwise.
3209 */
3210int
3211nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp)
3212{
3213 int i;
3214
3215 /*
3216 * This seems odd, but allow the case where the security flavor
3217 * list is empty. This happens when NFSv4 is traversing non-exported
3218 * file systems. Exported file systems should always have a non-empty
3219 * security flavor list.
3220 */
3221 if (exp->nes_numsecflavor == 0)
3222 return (0);
3223
3224 for (i = 0; i < exp->nes_numsecflavor; i++) {
3225 /*
3226 * The tests for privacy and integrity must be first,
3227 * since ND_GSS is set for everything but AUTH_SYS.
3228 */
3229 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P &&
3230 (nd->nd_flag & ND_GSSPRIVACY))
3231 return (0);
3232 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I &&
3233 (nd->nd_flag & ND_GSSINTEGRITY))
3234 return (0);
3235 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 &&
3236 (nd->nd_flag & ND_GSS))
3237 return (0);
3238 if (exp->nes_secflavors[i] == AUTH_SYS &&
3239 (nd->nd_flag & ND_GSS) == 0)
3240 return (0);
3241 }
3242 return (1);
3243}
3244
3245/*
3246 * Calculate a hash value for the fid in a file handle.
3247 */
3248uint32_t
3249nfsrv_hashfh(fhandle_t *fhp)
3250{
3251 uint32_t hashval;
3252
3253 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0);
3254 return (hashval);
3255}
3256
3257/*
3258 * Signal the userland master nfsd to backup the stable restart file.
3259 */
3260void
3261nfsrv_backupstable(void)
3262{
3263 struct proc *procp;
3264
3265 if (nfsd_master_proc != NULL) {
3266 procp = pfind(nfsd_master_pid);
3267 /* Try to make sure it is the correct process. */
3268 if (procp == nfsd_master_proc &&
3269 procp->p_stats->p_start.tv_sec ==
3270 nfsd_master_start.tv_sec &&
3271 procp->p_stats->p_start.tv_usec ==
3272 nfsd_master_start.tv_usec &&
3273 strcmp(procp->p_comm, nfsd_master_comm) == 0)
3274 kern_psignal(procp, SIGUSR2);
3275 else
3276 nfsd_master_proc = NULL;
3277
3278 if (procp != NULL)
3279 PROC_UNLOCK(procp);
3280 }
3281}
3282
3283extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *);
3284
3285/*
3286 * Called once to initialize data structures...
3287 */
3288static int
3289nfsd_modevent(module_t mod, int type, void *data)
3290{
3291 int error = 0;
3292 static int loaded = 0;
3293
3294 switch (type) {
3295 case MOD_LOAD:
3296 if (loaded)
3297 goto out;
3298 newnfs_portinit();
3299 mtx_init(&nfs_cache_mutex, "nfs_cache_mutex", NULL, MTX_DEF);
3300 mtx_init(&nfs_v4root_mutex, "nfs_v4root_mutex", NULL, MTX_DEF);
3301 mtx_init(&nfsv4root_mnt.mnt_mtx, "struct mount mtx", NULL,
3302 MTX_DEF);
3303 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0);
3304 nfsrvd_initcache();
3305 nfsd_init();
3306 NFSD_LOCK();
3307 nfsrvd_init(0);
3308 NFSD_UNLOCK();
3309 nfsd_mntinit();
3310#ifdef VV_DISABLEDELEG
3311 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation;
3312 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation;
3313#endif
3314 nfsd_call_servertimer = nfsrv_servertimer;
3315 nfsd_call_nfsd = nfssvc_nfsd;
3316 loaded = 1;
3317 break;
3318
3319 case MOD_UNLOAD:
3320 if (newnfs_numnfsd != 0) {
3321 error = EBUSY;
3322 break;
3323 }
3324
3325#ifdef VV_DISABLEDELEG
3326 vn_deleg_ops.vndeleg_recall = NULL;
3327 vn_deleg_ops.vndeleg_disable = NULL;
3328#endif
3329 nfsd_call_servertimer = NULL;
3330 nfsd_call_nfsd = NULL;
3331
3332 /* Clean out all NFSv4 state. */
3333 nfsrv_throwawayallstate(curthread);
3334
3335 /* Clean the NFS server reply cache */
3336 nfsrvd_cleancache();
3337
3338 /* Free up the krpc server pool. */
3339 if (nfsrvd_pool != NULL)
3340 svcpool_destroy(nfsrvd_pool);
3341
3342 /* and get rid of the locks */
3343 mtx_destroy(&nfs_cache_mutex);
3344 mtx_destroy(&nfs_v4root_mutex);
3345 mtx_destroy(&nfsv4root_mnt.mnt_mtx);
3346 lockdestroy(&nfsv4root_mnt.mnt_explock);
3347 loaded = 0;
3348 break;
3349 default:
3350 error = EOPNOTSUPP;
3351 break;
3352 }
3353
3354out:
3355 NFSEXITCODE(error);
3356 return (error);
3357}
3358static moduledata_t nfsd_mod = {
3359 "nfsd",
3360 nfsd_modevent,
3361 NULL,
3362};
3363DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY);
3364
3365/* So that loader and kldload(2) can find us, wherever we are.. */
3366MODULE_VERSION(nfsd, 1);
3367MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1);
3368MODULE_DEPEND(nfsd, nfslock, 1, 1, 1);
3369MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1);
3370MODULE_DEPEND(nfsd, krpc, 1, 1, 1);
3371MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1);
3372