1 /* $FreeBSD: releng/5.4/sys/nfs4client/nfs4_vfsops.c 141090 2005-01-31 23:27:04Z imp $ */
2 /* $Id: nfs_vfsops.c,v 1.38 2003/11/05 14:59:01 rees Exp $ */
3
4 /*-
5 * copyright (c) 2003
6 * the regents of the university of michigan
7 * all rights reserved
8 *
9 * permission is granted to use, copy, create derivative works and redistribute
10 * this software and such derivative works for any purpose, so long as the name
11 * of the university of michigan is not used in any advertising or publicity
12 * pertaining to the use or distribution of this software without specific,
13 * written prior authorization. if the above copyright notice or any other
14 * identification of the university of michigan is included in any copy of any
15 * portion of this software, then the disclaimer below must also be included.
16 *
17 * this software is provided as is, without representation from the university
18 * of michigan as to its fitness for any purpose, and without warranty by the
19 * university of michigan of any kind, either express or implied, including
20 * without limitation the implied warranties of merchantability and fitness for
21 * a particular purpose. the regents of the university of michigan shall not be
22 * liable for any damages, including special, indirect, incidental, or
23 * consequential damages, with respect to any claim arising out of or in
24 * connection with the use of the software, even if it has been or is hereafter
25 * advised of the possibility of such damages.
26 */
27
28 /*-
29 * Copyright (c) 1989, 1993, 1995
30 * The Regents of the University of California. All rights reserved.
31 *
32 * This code is derived from software contributed to Berkeley by
33 * Rick Macklem at The University of Guelph.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 4. Neither the name of the University nor the names of its contributors
44 * may be used to endorse or promote products derived from this software
45 * without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57 * SUCH DAMAGE.
58 *
59 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
60 */
61
62 #include <sys/cdefs.h>
63 __FBSDID("$FreeBSD: releng/5.4/sys/nfs4client/nfs4_vfsops.c 141090 2005-01-31 23:27:04Z imp $");
64
65 #include "opt_bootp.h"
66 #include "opt_nfsroot.h"
67
68 #include <sys/param.h>
69 #include <sys/systm.h>
70 #include <sys/kernel.h>
71 #include <sys/kthread.h>
72 #include <sys/limits.h>
73 #include <sys/lock.h>
74 #include <sys/malloc.h>
75 #include <sys/mbuf.h>
76 #include <sys/module.h>
77 #include <sys/mount.h>
78 #include <sys/proc.h>
79 #include <sys/socket.h>
80 #include <sys/socketvar.h>
81 #include <sys/sockio.h>
82 #include <sys/sysctl.h>
83 #include <sys/unistd.h>
84 #include <sys/vnode.h>
85
86 #include <vm/vm.h>
87 #include <vm/vm_extern.h>
88 #include <vm/uma.h>
89
90 #include <net/if.h>
91 #include <net/route.h>
92 #include <netinet/in.h>
93 #include <netinet/in_var.h>
94
95 #include <rpc/rpcclnt.h>
96
97 #include <nfs/rpcv2.h>
98 #include <nfs/nfsproto.h>
99 #include <nfsclient/nfs.h>
100 #include <nfs4client/nfs4.h>
101 #include <nfsclient/nfsnode.h>
102 #include <nfsclient/nfsmount.h>
103 #include <nfs/xdr_subs.h>
104 #include <nfsclient/nfsm_subs.h>
105 #include <nfsclient/nfsdiskless.h>
106
107 #include <nfs4client/nfs4m_subs.h>
108 #include <nfs4client/nfs4_vfs.h>
109
110 #include <nfs4client/nfs4_dev.h>
111 #include <nfs4client/nfs4_idmap.h>
112
113 SYSCTL_NODE(_vfs, OID_AUTO, nfs4, CTLFLAG_RW, 0, "NFS4 filesystem");
114 SYSCTL_STRUCT(_vfs_nfs4, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
115 &nfsstats, nfsstats, "S,nfsstats");
116
117 static void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp);
118 static void nfs4_daemon(void *arg);
119 static int mountnfs(struct nfs_args *, struct mount *,
120 struct sockaddr *, char *, char *, struct vnode **,
121 struct ucred *cred);
122 static int nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred);
123 static vfs_omount_t nfs_omount;
124 static vfs_unmount_t nfs_unmount;
125 static vfs_root_t nfs_root;
126 static vfs_statfs_t nfs_statfs;
127 static vfs_sync_t nfs_sync;
128
129 /*
130 * nfs vfs operations.
131 */
132 static struct vfsops nfs_vfsops = {
133 .vfs_init = nfs4_init,
134 .vfs_omount = nfs_omount,
135 .vfs_root = nfs_root,
136 .vfs_statfs = nfs_statfs,
137 .vfs_sync = nfs_sync,
138 .vfs_uninit = nfs4_uninit,
139 .vfs_unmount = nfs_unmount,
140 };
141 VFS_SET(nfs_vfsops, nfs4, VFCF_NETWORK);
142
143 static struct nfs_rpcops nfs4_rpcops = {
144 nfs4_readrpc,
145 nfs4_writerpc,
146 nfs4_writebp,
147 nfs4_readlinkrpc,
148 nfs4_invaldir,
149 nfs4_commit,
150 };
151
152 /* So that loader and kldload(2) can find us, wherever we are.. */
153 MODULE_VERSION(nfs4, 1);
154
155 void nfsargs_ntoh(struct nfs_args *);
156
157 int
158 nfs4_init(struct vfsconf *vfsp)
159 {
160
161 rpcclnt_init();
162 nfs4dev_init();
163 idmap_init();
164 nfsm_v4init();
165
166 return (0);
167 }
168
169 int
170 nfs4_uninit(struct vfsconf *vfsp)
171 {
172
173 rpcclnt_uninit();
174 nfs4dev_uninit();
175 idmap_uninit();
176
177 return (0);
178 }
179
180 /*
181 * nfs statfs call
182 */
183 static int
184 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
185 {
186 struct vnode *vp;
187 struct nfs_statfs *sfp;
188 caddr_t bpos, dpos;
189 struct nfsmount *nmp = VFSTONFS(mp);
190 int error = 0;
191 struct mbuf *mreq, *mrep = NULL, *md, *mb;
192 struct nfsnode *np;
193 struct nfs4_compound cp;
194 struct nfs4_oparg_getattr ga;
195 struct nfsv4_fattr *fap = &ga.fa;
196
197 #ifndef nolint
198 sfp = NULL;
199 #endif
200 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
201 if (error)
202 return (error);
203 vp = NFSTOV(np);
204 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
205 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1));
206 mb = mreq;
207 bpos = mtod(mb, caddr_t);
208
209 ga.bm = &nfsv4_fsattrbm;
210 nfs_v4initcompound(&cp);
211
212 nfsm_v4build_compound(&cp, "statfs()");
213 nfsm_v4build_putfh(&cp, vp);
214 nfsm_v4build_getattr(&cp, &ga);
215 nfsm_v4build_finalize(&cp);
216
217 nfsm_request(vp, NFSV4PROC_COMPOUND, td, td->td_ucred);
218 if (error != 0)
219 goto nfsmout;
220
221 nfsm_v4dissect_compound(&cp);
222 nfsm_v4dissect_putfh(&cp);
223 nfsm_v4dissect_getattr(&cp, &ga);
224
225 nfs4_vfsop_statfs(fap, sbp, mp);
226
227 nfsmout:
228 error = nfs_v4postop(&cp, error);
229
230 vput(vp);
231 if (mrep != NULL)
232 m_freem(mrep);
233
234 return (error);
235 }
236
237 static void
238 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
239 {
240 int s;
241 int adjsock;
242 int maxio;
243
244 s = splnet();
245 /*
246 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
247 * no sense in that context.
248 */
249 if (argp->sotype == SOCK_STREAM)
250 nmp->nm_flag &= ~NFSMNT_NOCONN;
251
252 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
253
254 /* Re-bind if rsrvd port requested and wasn't on one */
255 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
256 && (argp->flags & NFSMNT_RESVPORT);
257 /* Also re-bind if we're switching to/from a connected UDP socket */
258 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
259 (argp->flags & NFSMNT_NOCONN));
260
261 /* Update flags atomically. Don't change the lock bits. */
262 nmp->nm_flag = argp->flags | nmp->nm_flag;
263 splx(s);
264
265 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
266 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
267 if (nmp->nm_timeo < NFS_MINTIMEO)
268 nmp->nm_timeo = NFS_MINTIMEO;
269 else if (nmp->nm_timeo > NFS_MAXTIMEO)
270 nmp->nm_timeo = NFS_MAXTIMEO;
271 }
272
273 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
274 nmp->nm_retry = argp->retrans;
275 if (nmp->nm_retry > NFS_MAXREXMIT)
276 nmp->nm_retry = NFS_MAXREXMIT;
277 }
278
279 if (argp->flags & NFSMNT_NFSV3) {
280 if (argp->sotype == SOCK_DGRAM)
281 maxio = NFS_MAXDGRAMDATA;
282 else
283 maxio = NFS_MAXDATA;
284 } else
285 maxio = NFS_V2MAXDATA;
286
287 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
288 nmp->nm_wsize = argp->wsize;
289 /* Round down to multiple of blocksize */
290 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
291 if (nmp->nm_wsize <= 0)
292 nmp->nm_wsize = NFS_FABLKSIZE;
293 }
294 if (nmp->nm_wsize > maxio)
295 nmp->nm_wsize = maxio;
296 if (nmp->nm_wsize > MAXBSIZE)
297 nmp->nm_wsize = MAXBSIZE;
298
299 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
300 nmp->nm_rsize = argp->rsize;
301 /* Round down to multiple of blocksize */
302 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
303 if (nmp->nm_rsize <= 0)
304 nmp->nm_rsize = NFS_FABLKSIZE;
305 }
306 if (nmp->nm_rsize > maxio)
307 nmp->nm_rsize = maxio;
308 if (nmp->nm_rsize > MAXBSIZE)
309 nmp->nm_rsize = MAXBSIZE;
310
311 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
312 nmp->nm_readdirsize = argp->readdirsize;
313 }
314 if (nmp->nm_readdirsize > maxio)
315 nmp->nm_readdirsize = maxio;
316 if (nmp->nm_readdirsize > nmp->nm_rsize)
317 nmp->nm_readdirsize = nmp->nm_rsize;
318
319 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
320 nmp->nm_acregmin = argp->acregmin;
321 else
322 nmp->nm_acregmin = NFS_MINATTRTIMO;
323 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
324 nmp->nm_acregmax = argp->acregmax;
325 else
326 nmp->nm_acregmax = NFS_MAXATTRTIMO;
327 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
328 nmp->nm_acdirmin = argp->acdirmin;
329 else
330 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
331 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
332 nmp->nm_acdirmax = argp->acdirmax;
333 else
334 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
335 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
336 nmp->nm_acdirmin = nmp->nm_acdirmax;
337 if (nmp->nm_acregmin > nmp->nm_acregmax)
338 nmp->nm_acregmin = nmp->nm_acregmax;
339
340 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
341 if (argp->maxgrouplist <= NFS_MAXGRPS)
342 nmp->nm_numgrps = argp->maxgrouplist;
343 else
344 nmp->nm_numgrps = NFS_MAXGRPS;
345 }
346 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
347 if (argp->readahead <= NFS_MAXRAHEAD)
348 nmp->nm_readahead = argp->readahead;
349 else
350 nmp->nm_readahead = NFS_MAXRAHEAD;
351 }
352 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
353 if (argp->deadthresh <= NFS_MAXDEADTHRESH)
354 nmp->nm_deadthresh = argp->deadthresh;
355 else
356 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
357 }
358
359 adjsock |= ((nmp->nm_sotype != argp->sotype) ||
360 (nmp->nm_soproto != argp->proto));
361 nmp->nm_sotype = argp->sotype;
362 nmp->nm_soproto = argp->proto;
363
364 if (nmp->nm_rpcclnt.rc_so && adjsock) {
365 nfs_safedisconnect(nmp);
366 if (nmp->nm_sotype == SOCK_DGRAM) {
367 while (nfs4_connect(nmp)) {
368 printf("nfs_args: retrying connect\n");
369 (void) tsleep((caddr_t)&lbolt,
370 PSOCK, "nfscon", 0);
371 }
372 }
373 }
374 }
375
376 /*
377 * VFS Operations.
378 *
379 * mount system call
380 * It seems a bit dumb to copyinstr() the host and path here and then
381 * bcopy() them in mountnfs(), but I wanted to detect errors before
382 * doing the sockargs() call because sockargs() allocates an mbuf and
383 * an error after that means that I have to release the mbuf.
384 */
385 /* ARGSUSED */
386 static int
387 nfs_omount(struct mount *mp, char *path, caddr_t data, struct thread *td)
388 {
389 int error;
390 struct nfs_args args;
391 struct sockaddr *nam;
392 struct vnode *vp;
393 char hst[MNAMELEN];
394 size_t len;
395
396 if (path == NULL) {
397 printf("NFSv4: nfs_mountroot not supported\n");
398 return EINVAL;
399 }
400 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
401 if (error)
402 return (error);
403 if (args.version != NFS_ARGSVERSION)
404 return (EPROGMISMATCH);
405 if (mp->mnt_flag & MNT_UPDATE) {
406 struct nfsmount *nmp = VFSTONFS(mp);
407
408 if (nmp == NULL)
409 return (EIO);
410 /*
411 * When doing an update, we can't change from or to
412 * v3, switch lockd strategies or change cookie translation
413 */
414 args.flags = (args.flags &
415 ~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) |
416 (nmp->nm_flag &
417 (NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD));
418 nfs_decode_args(nmp, &args);
419 return (0);
420 }
421
422 if (error)
423 return (error);
424 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
425 if (error)
426 return (error);
427 bzero(&hst[len], MNAMELEN - len);
428 /* sockargs() call must be after above copyin() calls */
429 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
430 if (error)
431 return (error);
432 error = mountnfs(&args, mp, nam, path, hst, &vp, td->td_ucred);
433 return (error);
434 }
435
436 /*
437 * renew should be done async
438 * should re-scan mount queue each time
439 */
440 struct proc *nfs4_daemonproc;
441
442 static int
443 nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred)
444 {
445 struct nfs4_compound cp;
446 struct mbuf *mreq, *mrep = NULL, *md, *mb;
447 caddr_t bpos, dpos;
448 int error;
449
450 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t));
451 mb = mreq;
452 bpos = mtod(mb, caddr_t);
453
454 nfs_v4initcompound(&cp);
455
456 nfsm_v4build_compound(&cp, "nfs4_do_renew()");
457 nfsm_v4build_renew(&cp, nmp->nm_clientid);
458 nfsm_v4build_finalize(&cp);
459
460 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
461 if (error != 0)
462 goto nfsmout;
463
464 nfsm_v4dissect_compound(&cp);
465 nfsm_v4dissect_renew(&cp);
466 nmp->nm_last_renewal = time_second;
467 return (0);
468
469 nfsmout:
470 error = nfs_v4postop(&cp, error);
471
472 /* XXX */
473 if (mrep != NULL)
474 m_freem(mrep);
475 return (error);
476 }
477
478 static void
479 nfs4_daemon(void *arg)
480 {
481 struct mount *mp;
482 struct nfsmount *nmp;
483 int nmounts;
484
485 while (1) {
486 nmounts = 0;
487 mtx_lock(&mountlist_mtx);
488 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
489 if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0)
490 continue;
491 nmounts++;
492 nmp = VFSTONFS(mp);
493 if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4)
494 continue;
495 mtx_unlock(&mountlist_mtx);
496 mtx_lock(&Giant);
497 nfs4_do_renew(nmp, (struct ucred *) arg);
498 mtx_unlock(&Giant);
499 mtx_lock(&mountlist_mtx);
500 }
501 mtx_unlock(&mountlist_mtx);
502
503 /* Must kill the daemon here, or module unload will cause a panic */
504 if (nmounts == 0) {
505 mtx_lock(&Giant);
506 nfs4_daemonproc = NULL;
507 mtx_unlock(&Giant);
508 printf("nfsv4 renewd exiting\n");
509 kthread_exit(0);
510 }
511 tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz);
512 }
513 }
514
515 /*
516 * Common code for mount and mountroot
517 */
518 static int
519 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
520 char *pth, char *hst, struct vnode **vpp, struct ucred *cred)
521 {
522 struct nfsmount *nmp;
523 char *rpth, *cp1, *cp2;
524 int nlkup = 0, error;
525 struct nfs4_compound cp;
526 struct mbuf *mreq, *mrep = NULL, *md, *mb;
527 caddr_t bpos, dpos;
528 struct nfs4_oparg_lookup lkup;
529 struct nfs4_oparg_getfh gfh;
530 struct nfs4_oparg_getattr ga;
531 struct thread *td = curthread; /* XXX */
532
533 if (mp->mnt_flag & MNT_UPDATE) {
534 nmp = VFSTONFS(mp);
535 /* update paths, file handles, etc, here XXX */
536 FREE(nam, M_SONAME);
537 return (0);
538 } else {
539 nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
540 bzero((caddr_t)nmp, sizeof (struct nfsmount));
541 TAILQ_INIT(&nmp->nm_bufq);
542 mp->mnt_data = (qaddr_t)nmp;
543 }
544
545 vfs_getnewfsid(mp);
546 nmp->nm_mountp = mp;
547 nmp->nm_maxfilesize = 0xffffffffLL;
548 nmp->nm_timeo = NFS_TIMEO;
549 nmp->nm_retry = NFS_RETRANS;
550 nmp->nm_wsize = NFS_WSIZE;
551 nmp->nm_rsize = NFS_RSIZE;
552 nmp->nm_readdirsize = NFS_READDIRSIZE;
553 nmp->nm_numgrps = NFS_MAXGRPS;
554 nmp->nm_readahead = NFS_DEFRAHEAD;
555 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
556 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
557 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN);
558 nmp->nm_nam = nam;
559 /* Set up the sockets and per-host congestion */
560 nmp->nm_sotype = argp->sotype;
561 nmp->nm_soproto = argp->proto;
562 nmp->nm_rpcops = &nfs4_rpcops;
563 /* XXX */
564 mp->mnt_stat.f_iosize = PAGE_SIZE;
565
566 argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
567
568 nfs_decode_args(nmp, argp);
569
570 if ((error = nfs4_connect(nmp)))
571 goto bad;
572
573 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
574 mb = mreq;
575 bpos = mtod(mb, caddr_t);
576
577 ga.bm = &nfsv4_fsinfobm;
578 nfs_v4initcompound(&cp);
579
580 /* Get remote path */
581 rpth = hst;
582 strsep(&rpth, ":");
583
584 nfsm_v4build_compound(&cp, "mountnfs()");
585 nfsm_v4build_putrootfh(&cp);
586 for (cp1 = rpth; cp1 && *cp1; cp1 = cp2) {
587 while (*cp1 == '/')
588 cp1++;
589 if (!*cp1)
590 break;
591 for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++)
592 ;
593 lkup.name = cp1;
594 lkup.namelen = cp2 - cp1;
595 nfsm_v4build_lookup(&cp, &lkup);
596 nlkup++;
597 }
598 nfsm_v4build_getfh(&cp, &gfh);
599 nfsm_v4build_getattr(&cp, &ga);
600 nfsm_v4build_finalize(&cp);
601
602 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred);
603 if (error != 0)
604 goto nfsmout;
605
606 nfsm_v4dissect_compound(&cp);
607 nfsm_v4dissect_putrootfh(&cp);
608 while (nlkup--)
609 nfsm_v4dissect_lookup(&cp);
610 nfsm_v4dissect_getfh(&cp, &gfh);
611 nfsm_v4dissect_getattr(&cp, &ga);
612
613 nfs4_vfsop_fsinfo(&ga.fa, nmp);
614 nmp->nm_state |= NFSSTA_GOTFSINFO;
615
616 /* Copy root fh into nfsmount. */
617 nmp->nm_fhsize = gfh.fh_len;
618 bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize);
619 nmp->nm_last_renewal = time_second;
620
621 if ((error = nfs4_do_setclientid(nmp, cred)) != 0)
622 goto nfsmout;
623
624 /* Start renewd if it isn't already running */
625 if (nfs4_daemonproc == NULL)
626 kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc,
627 (RFPROC|RFMEM), 0, "nfs4rd");
628
629 return (0);
630 nfsmout:
631 error = nfs_v4postop(&cp, error);
632
633 /* XXX */
634 if (mrep != NULL)
635 m_freem(mrep);
636 bad:
637 nfs_disconnect(nmp);
638 uma_zfree(nfsmount_zone, nmp);
639 FREE(nam, M_SONAME);
640
641 return (error);
642 }
643
644 /*
645 * unmount system call
646 */
647 static int
648 nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
649 {
650 struct nfsmount *nmp;
651 int error, flags = 0;
652
653 if (mntflags & MNT_FORCE)
654 flags |= FORCECLOSE;
655 nmp = VFSTONFS(mp);
656 /*
657 * Goes something like this..
658 * - Call vflush(, td) to clear out vnodes for this filesystem
659 * - Close the socket
660 * - Free up the data structures
661 */
662 /* In the forced case, cancel any outstanding requests. */
663 if (flags & FORCECLOSE) {
664 error = nfs_nmcancelreqs(nmp);
665 if (error)
666 return (error);
667 nfs4dev_purge();
668 }
669
670 error = vflush(mp, 0, flags, td);
671 if (error)
672 return (error);
673
674 /*
675 * We are now committed to the unmount.
676 */
677 nfs_disconnect(nmp);
678 FREE(nmp->nm_nam, M_SONAME);
679
680 /* XXX there's a race condition here for SMP */
681 wakeup(&nfs4_daemonproc);
682
683 uma_zfree(nfsmount_zone, nmp);
684 return (0);
685 }
686
687 /*
688 * Return root of a filesystem
689 */
690 static int
691 nfs_root(struct mount *mp, struct vnode **vpp, struct thread *td)
692 {
693 struct vnode *vp;
694 struct nfsmount *nmp;
695 struct nfsnode *np;
696 int error;
697
698 nmp = VFSTONFS(mp);
699 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
700 if (error)
701 return (error);
702 vp = NFSTOV(np);
703 if (vp->v_type == VNON)
704 vp->v_type = VDIR;
705 vp->v_vflag |= VV_ROOT;
706 *vpp = vp;
707
708 return (0);
709 }
710
711 /*
712 * Flush out the buffer cache
713 */
714 /* ARGSUSED */
715 static int
716 nfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct thread *td)
717 {
718 struct vnode *vp, *nvp;
719 int error, allerror = 0;
720
721 /*
722 * Force stale buffer cache information to be flushed.
723 */
724 MNT_ILOCK(mp);
725 loop:
726 MNT_VNODE_FOREACH(vp, mp, nvp) {
727 VI_LOCK(vp);
728 MNT_IUNLOCK(mp);
729 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
730 waitfor == MNT_LAZY) {
731 VI_UNLOCK(vp);
732 MNT_ILOCK(mp);
733 continue;
734 }
735 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
736 goto loop;
737 }
738 error = VOP_FSYNC(vp, cred, waitfor, td);
739 if (error)
740 allerror = error;
741 VOP_UNLOCK(vp, 0, td);
742 vrele(vp);
743
744 MNT_ILOCK(mp);
745 }
746 MNT_IUNLOCK(mp);
747 return (allerror);
748 }
749
750 static int
751 nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
752 {
753 struct nfs4_oparg_setclientid scid;
754 struct nfs4_compound cp;
755 struct mbuf *mreq, *mrep = NULL, *md, *mb;
756 caddr_t bpos, dpos;
757 struct route ro;
758 char *ipsrc = NULL, uaddr[24], name[24];
759 int try = 0;
760 static unsigned long seq;
761 int error;
762
763 #ifndef NFS4_USE_RPCCLNT
764 return (0);
765 #endif
766 if (nmp->nm_clientid) {
767 printf("nfs4_do_setclientid: already have clientid!\n");
768 error = 0;
769 goto nfsmout;
770 }
771
772 /* Try not to re-use clientids */
773 if (seq == 0)
774 seq = time_second;
775
776 #ifdef NFS4_USE_RPCCLNT
777 scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
778 #endif
779 scid.cb_netid = "tcp";
780 scid.cb_netidlen = 3;
781 scid.cb_prog = 0x1234; /* XXX */
782
783 /* Do a route lookup to find our source address for talking to this server */
784 bzero(&ro, sizeof ro);
785
786 #ifdef NFS4_USE_RPCCLNT
787 ro.ro_dst = *nmp->nm_rpcclnt.rc_name;
788 #endif
789 rtalloc(&ro);
790 if (ro.ro_rt == NULL) {
791 error = EHOSTUNREACH;
792 goto nfsmout;
793 }
794 ipsrc = inet_ntoa(IA_SIN(ifatoia(ro.ro_rt->rt_ifa))->sin_addr);
795 sprintf(uaddr, "%s.12.48", ipsrc);
796 scid.cb_univaddr = uaddr;
797 scid.cb_univaddrlen = strlen(uaddr);
798 RTFREE(ro.ro_rt);
799
800 try_again:
801 sprintf(name, "%s-%d", ipsrc, (int) ((seq + try) % 1000000L));
802 scid.namelen = strlen(name);
803 scid.name = name;
804 nfs_v4initcompound(&cp);
805
806 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
807 mb = mreq;
808 bpos = mtod(mb, caddr_t);
809
810 nfsm_v4build_compound(&cp, "nfs4_do_setclientid()");
811 nfsm_v4build_setclientid(&cp, &scid);
812 nfsm_v4build_finalize(&cp);
813
814 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
815 if (error != 0)
816 goto nfsmout;
817
818 nfsm_v4dissect_compound(&cp);
819 nfsm_v4dissect_setclientid(&cp, &scid);
820 nmp->nm_clientid = scid.clientid;
821
822 error = nfs_v4postop(&cp, error);
823
824 /* Confirm */
825 m_freem(mrep);
826 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
827 mb = mreq;
828 bpos = mtod(mb, caddr_t);
829
830 nfs_v4initcompound(&cp);
831
832 nfsm_v4build_compound(&cp, "nfs4_do_setclientid() (confirm)");
833 nfsm_v4build_setclientid_confirm(&cp, &scid);
834 nfsm_v4build_finalize(&cp);
835
836 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
837 if (error != 0)
838 goto nfsmout;
839
840 nfsm_v4dissect_compound(&cp);
841 nfsm_v4dissect_setclientid_confirm(&cp);
842
843 nfsmout:
844 error = nfs_v4postop(&cp, error);
845
846 if (mrep)
847 m_freem(mrep);
848 if (error == NFSERR_CLID_INUSE && (++try < NFS4_SETCLIENTID_MAXTRIES))
849 goto try_again;
850
851 return (error);
852 }
Cache object: 83a4b28211daa2cc818f6fe51e893c20
|