1 /* $FreeBSD: releng/6.1/sys/nfs4client/nfs4_vfsops.c 154923 2006-01-27 18:22:53Z rees $ */
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/6.1/sys/nfs4client/nfs4_vfsops.c 154923 2006-01-27 18:22:53Z rees $");
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 #include <sys/signalvar.h>
86
87 #include <vm/vm.h>
88 #include <vm/vm_extern.h>
89 #include <vm/uma.h>
90
91 #include <net/if.h>
92 #include <net/route.h>
93 #include <netinet/in.h>
94 #include <netinet/in_var.h>
95
96 #include <rpc/rpcclnt.h>
97
98 #include <nfs/rpcv2.h>
99 #include <nfs/nfsproto.h>
100 #include <nfsclient/nfs.h>
101 #include <nfs4client/nfs4.h>
102 #include <nfsclient/nfsnode.h>
103 #include <nfsclient/nfsmount.h>
104 #include <nfs/xdr_subs.h>
105 #include <nfsclient/nfsm_subs.h>
106 #include <nfsclient/nfsdiskless.h>
107
108 #include <nfs4client/nfs4m_subs.h>
109 #include <nfs4client/nfs4_vfs.h>
110
111 #include <nfs4client/nfs4_dev.h>
112 #include <nfs4client/nfs4_idmap.h>
113
114 SYSCTL_NODE(_vfs, OID_AUTO, nfs4, CTLFLAG_RW, 0, "NFS4 filesystem");
115 SYSCTL_STRUCT(_vfs_nfs4, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
116 &nfsstats, nfsstats, "S,nfsstats");
117
118 static void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp);
119 static void nfs4_daemon(void *arg);
120 static int mountnfs(struct nfs_args *, struct mount *,
121 struct sockaddr *, char *, struct vnode **,
122 struct ucred *cred);
123 static int nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred);
124 static vfs_mount_t nfs_mount;
125 static vfs_cmount_t nfs_cmount;
126 static vfs_unmount_t nfs_unmount;
127 static vfs_root_t nfs_root;
128 static vfs_statfs_t nfs_statfs;
129 static vfs_sync_t nfs_sync;
130
131 /*
132 * nfs vfs operations.
133 */
134 static struct vfsops nfs_vfsops = {
135 .vfs_init = nfs4_init,
136 .vfs_mount = nfs_mount,
137 .vfs_cmount = nfs_cmount,
138 .vfs_root = nfs_root,
139 .vfs_statfs = nfs_statfs,
140 .vfs_sync = nfs_sync,
141 .vfs_uninit = nfs4_uninit,
142 .vfs_unmount = nfs_unmount,
143 };
144 VFS_SET(nfs_vfsops, nfs4, VFCF_NETWORK);
145
146 static struct nfs_rpcops nfs4_rpcops = {
147 nfs4_readrpc,
148 nfs4_writerpc,
149 nfs4_writebp,
150 nfs4_readlinkrpc,
151 nfs4_invaldir,
152 nfs4_commit,
153 };
154
155 /* So that loader and kldload(2) can find us, wherever we are.. */
156 MODULE_VERSION(nfs4, 1);
157
158 void nfsargs_ntoh(struct nfs_args *);
159
160 int
161 nfs4_init(struct vfsconf *vfsp)
162 {
163
164 rpcclnt_init();
165 nfs4dev_init();
166 idmap_init();
167 nfsm_v4init();
168
169 return (0);
170 }
171
172 int
173 nfs4_uninit(struct vfsconf *vfsp)
174 {
175
176 rpcclnt_uninit();
177 nfs4dev_uninit();
178 idmap_uninit();
179
180 return (0);
181 }
182
183 /*
184 * nfs statfs call
185 */
186 static int
187 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
188 {
189 struct vnode *vp;
190 struct nfs_statfs *sfp;
191 caddr_t bpos, dpos;
192 struct nfsmount *nmp = VFSTONFS(mp);
193 int error = 0;
194 struct mbuf *mreq, *mrep = NULL, *md, *mb;
195 struct nfsnode *np;
196 struct nfs4_compound cp;
197 struct nfs4_oparg_getattr ga;
198 struct nfsv4_fattr *fap = &ga.fa;
199
200 #ifndef nolint
201 sfp = NULL;
202 #endif
203 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
204 if (error)
205 return (error);
206 vp = NFSTOV(np);
207 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
208 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1));
209 mb = mreq;
210 bpos = mtod(mb, caddr_t);
211
212 ga.bm = &nfsv4_fsattrbm;
213 nfs_v4initcompound(&cp);
214
215 nfsm_v4build_compound(&cp, "statfs()");
216 nfsm_v4build_putfh(&cp, vp);
217 nfsm_v4build_getattr(&cp, &ga);
218 nfsm_v4build_finalize(&cp);
219
220 nfsm_request(vp, NFSV4PROC_COMPOUND, td, td->td_ucred);
221 if (error != 0)
222 goto nfsmout;
223
224 nfsm_v4dissect_compound(&cp);
225 nfsm_v4dissect_putfh(&cp);
226 nfsm_v4dissect_getattr(&cp, &ga);
227
228 nfs4_vfsop_statfs(fap, sbp, mp);
229
230 nfsmout:
231 error = nfs_v4postop(&cp, error);
232
233 vput(vp);
234 if (mrep != NULL)
235 m_freem(mrep);
236
237 return (error);
238 }
239
240 static void
241 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
242 {
243 int s;
244 int adjsock;
245 int maxio;
246
247 s = splnet();
248 /*
249 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
250 * no sense in that context.
251 */
252 if (argp->sotype == SOCK_STREAM)
253 nmp->nm_flag &= ~NFSMNT_NOCONN;
254
255 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
256
257 /* Re-bind if rsrvd port requested and wasn't on one */
258 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
259 && (argp->flags & NFSMNT_RESVPORT);
260 /* Also re-bind if we're switching to/from a connected UDP socket */
261 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
262 (argp->flags & NFSMNT_NOCONN));
263
264 /* Update flags atomically. Don't change the lock bits. */
265 nmp->nm_flag = argp->flags | nmp->nm_flag;
266 splx(s);
267
268 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
269 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
270 if (nmp->nm_timeo < NFS_MINTIMEO)
271 nmp->nm_timeo = NFS_MINTIMEO;
272 else if (nmp->nm_timeo > NFS_MAXTIMEO)
273 nmp->nm_timeo = NFS_MAXTIMEO;
274 }
275
276 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
277 nmp->nm_retry = argp->retrans;
278 if (nmp->nm_retry > NFS_MAXREXMIT)
279 nmp->nm_retry = NFS_MAXREXMIT;
280 }
281
282 if (argp->flags & NFSMNT_NFSV3) {
283 if (argp->sotype == SOCK_DGRAM)
284 maxio = NFS_MAXDGRAMDATA;
285 else
286 maxio = NFS_MAXDATA;
287 } else
288 maxio = NFS_V2MAXDATA;
289
290 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
291 nmp->nm_wsize = argp->wsize;
292 /* Round down to multiple of blocksize */
293 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
294 if (nmp->nm_wsize <= 0)
295 nmp->nm_wsize = NFS_FABLKSIZE;
296 }
297 if (nmp->nm_wsize > maxio)
298 nmp->nm_wsize = maxio;
299 if (nmp->nm_wsize > MAXBSIZE)
300 nmp->nm_wsize = MAXBSIZE;
301
302 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
303 nmp->nm_rsize = argp->rsize;
304 /* Round down to multiple of blocksize */
305 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
306 if (nmp->nm_rsize <= 0)
307 nmp->nm_rsize = NFS_FABLKSIZE;
308 }
309 if (nmp->nm_rsize > maxio)
310 nmp->nm_rsize = maxio;
311 if (nmp->nm_rsize > MAXBSIZE)
312 nmp->nm_rsize = MAXBSIZE;
313
314 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
315 nmp->nm_readdirsize = argp->readdirsize;
316 }
317 if (nmp->nm_readdirsize > maxio)
318 nmp->nm_readdirsize = maxio;
319 if (nmp->nm_readdirsize > nmp->nm_rsize)
320 nmp->nm_readdirsize = nmp->nm_rsize;
321
322 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
323 nmp->nm_acregmin = argp->acregmin;
324 else
325 nmp->nm_acregmin = NFS_MINATTRTIMO;
326 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
327 nmp->nm_acregmax = argp->acregmax;
328 else
329 nmp->nm_acregmax = NFS_MAXATTRTIMO;
330 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
331 nmp->nm_acdirmin = argp->acdirmin;
332 else
333 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
334 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
335 nmp->nm_acdirmax = argp->acdirmax;
336 else
337 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
338 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
339 nmp->nm_acdirmin = nmp->nm_acdirmax;
340 if (nmp->nm_acregmin > nmp->nm_acregmax)
341 nmp->nm_acregmin = nmp->nm_acregmax;
342
343 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
344 if (argp->maxgrouplist <= NFS_MAXGRPS)
345 nmp->nm_numgrps = argp->maxgrouplist;
346 else
347 nmp->nm_numgrps = NFS_MAXGRPS;
348 }
349 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
350 if (argp->readahead <= NFS_MAXRAHEAD)
351 nmp->nm_readahead = argp->readahead;
352 else
353 nmp->nm_readahead = NFS_MAXRAHEAD;
354 }
355 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
356 if (argp->deadthresh <= NFS_MAXDEADTHRESH)
357 nmp->nm_deadthresh = argp->deadthresh;
358 else
359 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
360 }
361
362 adjsock |= ((nmp->nm_sotype != argp->sotype) ||
363 (nmp->nm_soproto != argp->proto));
364 nmp->nm_sotype = argp->sotype;
365 nmp->nm_soproto = argp->proto;
366
367 if (nmp->nm_rpcclnt.rc_so && adjsock) {
368 nfs_safedisconnect(nmp);
369 if (nmp->nm_sotype == SOCK_DGRAM) {
370 while (nfs4_connect(nmp)) {
371 printf("nfs_args: retrying connect\n");
372 (void) tsleep((caddr_t)&lbolt,
373 PSOCK, "nfscon", 0);
374 }
375 }
376 }
377 }
378
379 /*
380 * VFS Operations.
381 *
382 * mount system call
383 * It seems a bit dumb to copyinstr() the host and path here and then
384 * bcopy() them in mountnfs(), but I wanted to detect errors before
385 * doing the sockargs() call because sockargs() allocates an mbuf and
386 * an error after that means that I have to release the mbuf.
387 */
388 /* ARGSUSED */
389 static int
390 nfs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
391 {
392 struct nfs_args args;
393 int error;
394
395 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
396 if (error)
397 return (error);
398
399 ma = mount_arg(ma, "nfs_args", &args, sizeof args);
400
401 error = kernel_mount(ma, flags);
402
403 return (error);
404 }
405
406 static int
407 nfs_mount(struct mount *mp, struct thread *td)
408 {
409 int error;
410 struct nfs_args args;
411 struct sockaddr *nam;
412 struct vnode *vp;
413 char hst[MNAMELEN];
414 size_t len;
415
416 if (mp->mnt_flag & MNT_ROOTFS) {
417 printf("NFSv4: nfs_mountroot not supported\n");
418 return EINVAL;
419 }
420 error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, sizeof args);
421 if (error)
422 return (error);
423
424 if (args.version != NFS_ARGSVERSION)
425 return (EPROGMISMATCH);
426 if (mp->mnt_flag & MNT_UPDATE) {
427 struct nfsmount *nmp = VFSTONFS(mp);
428
429 if (nmp == NULL)
430 return (EIO);
431 /*
432 * When doing an update, we can't change from or to
433 * v3, switch lockd strategies or change cookie translation
434 */
435 args.flags = (args.flags &
436 ~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) |
437 (nmp->nm_flag &
438 (NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD));
439 nfs_decode_args(nmp, &args);
440 return (0);
441 }
442
443 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
444 if (error)
445 return (error);
446 bzero(&hst[len], MNAMELEN - len);
447 /* sockargs() call must be after above copyin() calls */
448 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
449 if (error)
450 return (error);
451 error = mountnfs(&args, mp, nam, hst, &vp, td->td_ucred);
452 return (error);
453 }
454
455 /*
456 * renew should be done async
457 * should re-scan mount queue each time
458 */
459 struct proc *nfs4_daemonproc;
460
461 static int
462 nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred)
463 {
464 struct nfs4_compound cp;
465 struct mbuf *mreq, *mrep = NULL, *md, *mb;
466 caddr_t bpos, dpos;
467 int error;
468
469 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t));
470 mb = mreq;
471 bpos = mtod(mb, caddr_t);
472
473 nfs_v4initcompound(&cp);
474
475 nfsm_v4build_compound(&cp, "nfs4_do_renew()");
476 nfsm_v4build_renew(&cp, nmp->nm_clientid);
477 nfsm_v4build_finalize(&cp);
478
479 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
480 if (error != 0)
481 goto nfsmout;
482
483 nfsm_v4dissect_compound(&cp);
484 nfsm_v4dissect_renew(&cp);
485 nmp->nm_last_renewal = time_second;
486 return (0);
487
488 nfsmout:
489 error = nfs_v4postop(&cp, error);
490
491 /* XXX */
492 if (mrep != NULL)
493 m_freem(mrep);
494 return (error);
495 }
496
497 static void
498 nfs4_daemon(void *arg)
499 {
500 struct mount *mp;
501 struct nfsmount *nmp;
502 int nmounts;
503
504 while (1) {
505 nmounts = 0;
506 mtx_lock(&mountlist_mtx);
507 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
508 if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0)
509 continue;
510 nmounts++;
511 nmp = VFSTONFS(mp);
512 if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4)
513 continue;
514 mtx_unlock(&mountlist_mtx);
515 mtx_lock(&Giant);
516 nfs4_do_renew(nmp, (struct ucred *) arg);
517 mtx_unlock(&Giant);
518 mtx_lock(&mountlist_mtx);
519 }
520 mtx_unlock(&mountlist_mtx);
521
522 /* Must kill the daemon here, or module unload will cause a panic */
523 if (nmounts == 0) {
524 mtx_lock(&Giant);
525 nfs4_daemonproc = NULL;
526 mtx_unlock(&Giant);
527 /*printf("nfsv4 renewd exiting\n");*/
528 kthread_exit(0);
529 }
530 tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz);
531 }
532 }
533
534 /*
535 * Common code for mount and mountroot
536 */
537 static int
538 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
539 char *hst, struct vnode **vpp, struct ucred *cred)
540 {
541 struct nfsmount *nmp;
542 char *rpth, *cp1, *cp2;
543 int nlkup = 0, error;
544 struct nfs4_compound cp;
545 struct mbuf *mreq, *mrep = NULL, *md, *mb;
546 caddr_t bpos, dpos;
547 struct nfs4_oparg_lookup lkup;
548 struct nfs4_oparg_getfh gfh;
549 struct nfs4_oparg_getattr ga;
550 struct thread *td = curthread; /* XXX */
551
552 if (mp->mnt_flag & MNT_UPDATE) {
553 nmp = VFSTONFS(mp);
554 /* update paths, file handles, etc, here XXX */
555 FREE(nam, M_SONAME);
556 return (0);
557 } else {
558 nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
559 bzero((caddr_t)nmp, sizeof (struct nfsmount));
560 TAILQ_INIT(&nmp->nm_bufq);
561 mp->mnt_data = (qaddr_t)nmp;
562 }
563
564 vfs_getnewfsid(mp);
565 nmp->nm_mountp = mp;
566 nmp->nm_maxfilesize = 0xffffffffLL;
567 nmp->nm_timeo = NFS_TIMEO;
568 nmp->nm_retry = NFS_RETRANS;
569 nmp->nm_wsize = NFS_WSIZE;
570 nmp->nm_rsize = NFS_RSIZE;
571 nmp->nm_readdirsize = NFS_READDIRSIZE;
572 nmp->nm_numgrps = NFS_MAXGRPS;
573 nmp->nm_readahead = NFS_DEFRAHEAD;
574 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
575 vfs_mountedfrom(mp, hst);
576 nmp->nm_nam = nam;
577 /* Set up the sockets and per-host congestion */
578 nmp->nm_sotype = argp->sotype;
579 nmp->nm_soproto = argp->proto;
580 nmp->nm_rpcops = &nfs4_rpcops;
581 /* XXX */
582 mp->mnt_stat.f_iosize = PAGE_SIZE;
583
584 argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
585
586 nfs_decode_args(nmp, argp);
587
588 if ((error = nfs4_connect(nmp)))
589 goto bad;
590
591 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
592 mb = mreq;
593 bpos = mtod(mb, caddr_t);
594
595 ga.bm = &nfsv4_fsinfobm;
596 nfs_v4initcompound(&cp);
597
598 /* Get remote path */
599 rpth = hst;
600 strsep(&rpth, ":");
601
602 nfsm_v4build_compound(&cp, "mountnfs()");
603 nfsm_v4build_putrootfh(&cp);
604 for (cp1 = rpth; cp1 && *cp1; cp1 = cp2) {
605 while (*cp1 == '/')
606 cp1++;
607 if (!*cp1)
608 break;
609 for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++)
610 ;
611 lkup.name = cp1;
612 lkup.namelen = cp2 - cp1;
613 nfsm_v4build_lookup(&cp, &lkup);
614 nlkup++;
615 }
616 nfsm_v4build_getfh(&cp, &gfh);
617 nfsm_v4build_getattr(&cp, &ga);
618 nfsm_v4build_finalize(&cp);
619
620 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred);
621 if (error != 0)
622 goto nfsmout;
623
624 nfsm_v4dissect_compound(&cp);
625 nfsm_v4dissect_putrootfh(&cp);
626 while (nlkup--)
627 nfsm_v4dissect_lookup(&cp);
628 nfsm_v4dissect_getfh(&cp, &gfh);
629 nfsm_v4dissect_getattr(&cp, &ga);
630
631 nfs4_vfsop_fsinfo(&ga.fa, nmp);
632 nmp->nm_state |= NFSSTA_GOTFSINFO;
633
634 /* Copy root fh into nfsmount. */
635 nmp->nm_fhsize = gfh.fh_len;
636 bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize);
637 nmp->nm_last_renewal = time_second;
638
639 if ((error = nfs4_do_setclientid(nmp, cred)) != 0)
640 goto nfsmout;
641
642 /* Start renewd if it isn't already running */
643 if (nfs4_daemonproc == NULL)
644 kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc,
645 (RFPROC|RFMEM), 0, "nfs4rd");
646
647 return (0);
648 nfsmout:
649 error = nfs_v4postop(&cp, error);
650
651 /* XXX */
652 if (mrep != NULL)
653 m_freem(mrep);
654 bad:
655 nfs4_disconnect(nmp);
656 uma_zfree(nfsmount_zone, nmp);
657 FREE(nam, M_SONAME);
658
659 return (error);
660 }
661
662 /*
663 * unmount system call
664 */
665 static int
666 nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
667 {
668 struct nfsmount *nmp;
669 int error, flags = 0;
670
671 if (mntflags & MNT_FORCE)
672 flags |= FORCECLOSE;
673 nmp = VFSTONFS(mp);
674 /*
675 * Goes something like this..
676 * - Call vflush(, td) to clear out vnodes for this filesystem
677 * - Close the socket
678 * - Free up the data structures
679 */
680 /* In the forced case, cancel any outstanding requests. */
681 if (flags & FORCECLOSE) {
682 error = nfs_nmcancelreqs(nmp);
683 if (error)
684 return (error);
685 nfs4dev_purge();
686 }
687
688 error = vflush(mp, 0, flags, td);
689 if (error)
690 return (error);
691
692 /*
693 * We are now committed to the unmount.
694 */
695 nfs4_disconnect(nmp);
696 FREE(nmp->nm_nam, M_SONAME);
697
698 /* XXX there's a race condition here for SMP */
699 wakeup(&nfs4_daemonproc);
700
701 uma_zfree(nfsmount_zone, nmp);
702 return (0);
703 }
704
705 /*
706 * Return root of a filesystem
707 */
708 static int
709 nfs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td)
710 {
711 struct vnode *vp;
712 struct nfsmount *nmp;
713 struct nfsnode *np;
714 int error;
715
716 nmp = VFSTONFS(mp);
717 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
718 if (error)
719 return (error);
720 vp = NFSTOV(np);
721 if (vp->v_type == VNON)
722 vp->v_type = VDIR;
723 vp->v_vflag |= VV_ROOT;
724 *vpp = vp;
725
726 return (0);
727 }
728
729 /*
730 * Flush out the buffer cache
731 */
732 /* ARGSUSED */
733 static int
734 nfs_sync(struct mount *mp, int waitfor, struct thread *td)
735 {
736 struct vnode *vp, *mvp;
737 int error, allerror = 0;
738
739 /*
740 * Force stale buffer cache information to be flushed.
741 */
742 MNT_ILOCK(mp);
743 loop:
744 MNT_VNODE_FOREACH(vp, mp, mvp) {
745 VI_LOCK(vp);
746 MNT_IUNLOCK(mp);
747 if (VOP_ISLOCKED(vp, NULL) ||
748 vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
749 waitfor == MNT_LAZY) {
750 VI_UNLOCK(vp);
751 MNT_ILOCK(mp);
752 continue;
753 }
754 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
755 MNT_ILOCK(mp);
756 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
757 goto loop;
758 }
759 error = VOP_FSYNC(vp, waitfor, td);
760 if (error)
761 allerror = error;
762 VOP_UNLOCK(vp, 0, td);
763 vrele(vp);
764
765 MNT_ILOCK(mp);
766 }
767 MNT_IUNLOCK(mp);
768 return (allerror);
769 }
770
771 static int
772 nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
773 {
774 struct nfs4_oparg_setclientid scid;
775 struct nfs4_compound cp;
776 struct mbuf *mreq, *mrep = NULL, *md, *mb;
777 caddr_t bpos, dpos;
778 struct route ro;
779 char *ipsrc = NULL, uaddr[24], name[24];
780 int try = 0;
781 static unsigned long seq;
782 int error;
783
784 #ifndef NFS4_USE_RPCCLNT
785 return (0);
786 #endif
787 if (nmp->nm_clientid) {
788 printf("nfs4_do_setclientid: already have clientid!\n");
789 error = 0;
790 goto nfsmout;
791 }
792
793 /* Try not to re-use clientids */
794 if (seq == 0)
795 seq = time_second;
796
797 #ifdef NFS4_USE_RPCCLNT
798 scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
799 #endif
800 scid.cb_netid = "tcp";
801 scid.cb_netidlen = 3;
802 scid.cb_prog = 0x1234; /* XXX */
803
804 /* Do a route lookup to find our source address for talking to this server */
805 bzero(&ro, sizeof ro);
806
807 #ifdef NFS4_USE_RPCCLNT
808 ro.ro_dst = *nmp->nm_rpcclnt.rc_name;
809 #endif
810 rtalloc(&ro);
811 if (ro.ro_rt == NULL) {
812 error = EHOSTUNREACH;
813 goto nfsmout;
814 }
815 ipsrc = inet_ntoa(IA_SIN(ifatoia(ro.ro_rt->rt_ifa))->sin_addr);
816 sprintf(uaddr, "%s.12.48", ipsrc);
817 scid.cb_univaddr = uaddr;
818 scid.cb_univaddrlen = strlen(uaddr);
819 RTFREE(ro.ro_rt);
820
821 try_again:
822 sprintf(name, "%s-%d", ipsrc, (int) ((seq + try) % 1000000L));
823 scid.namelen = strlen(name);
824 scid.name = name;
825 nfs_v4initcompound(&cp);
826
827 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
828 mb = mreq;
829 bpos = mtod(mb, caddr_t);
830
831 nfsm_v4build_compound(&cp, "nfs4_do_setclientid()");
832 nfsm_v4build_setclientid(&cp, &scid);
833 nfsm_v4build_finalize(&cp);
834
835 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
836 if (error != 0)
837 goto nfsmout;
838
839 nfsm_v4dissect_compound(&cp);
840 nfsm_v4dissect_setclientid(&cp, &scid);
841 nmp->nm_clientid = scid.clientid;
842
843 error = nfs_v4postop(&cp, error);
844
845 /* Confirm */
846 m_freem(mrep);
847 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
848 mb = mreq;
849 bpos = mtod(mb, caddr_t);
850
851 nfs_v4initcompound(&cp);
852
853 nfsm_v4build_compound(&cp, "nfs4_do_setclientid() (confirm)");
854 nfsm_v4build_setclientid_confirm(&cp, &scid);
855 nfsm_v4build_finalize(&cp);
856
857 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
858 if (error != 0)
859 goto nfsmout;
860
861 nfsm_v4dissect_compound(&cp);
862 nfsm_v4dissect_setclientid_confirm(&cp);
863
864 nfsmout:
865 error = nfs_v4postop(&cp, error);
866
867 if (mrep)
868 m_freem(mrep);
869 if (error == NFSERR_CLID_INUSE && (++try < NFS4_SETCLIENTID_MAXTRIES))
870 goto try_again;
871
872 return (error);
873 }
Cache object: 1407f820a03a708a35d924d303b109ee
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