1 /* $FreeBSD: releng/6.4/sys/nfs4client/nfs4_vfsops.c 166632 2007-02-11 03:07:46Z mohans $ */
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/6.4/sys/nfs4client/nfs4_vfsops.c 166632 2007-02-11 03:07:46Z mohans $");
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, LK_EXCLUSIVE);
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 /*
250 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
251 * no sense in that context. Also, set appropriate retransmit
252 * and soft timeout behavior.
253 */
254 if (argp->sotype == SOCK_STREAM) {
255 nmp->nm_flag &= ~NFSMNT_NOCONN;
256 nmp->nm_flag |= NFSMNT_DUMBTIMR;
257 nmp->nm_timeo = NFS_MAXTIMEO;
258 nmp->nm_retry = NFS_RETRANS_TCP;
259 }
260
261 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
262
263 /* Re-bind if rsrvd port requested and wasn't on one */
264 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
265 && (argp->flags & NFSMNT_RESVPORT);
266 /* Also re-bind if we're switching to/from a connected UDP socket */
267 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
268 (argp->flags & NFSMNT_NOCONN));
269
270 /* Update flags atomically. Don't change the lock bits. */
271 nmp->nm_flag = argp->flags | nmp->nm_flag;
272 splx(s);
273
274 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
275 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
276 if (nmp->nm_timeo < NFS_MINTIMEO)
277 nmp->nm_timeo = NFS_MINTIMEO;
278 else if (nmp->nm_timeo > NFS_MAXTIMEO)
279 nmp->nm_timeo = NFS_MAXTIMEO;
280 }
281
282 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
283 nmp->nm_retry = argp->retrans;
284 if (nmp->nm_retry > NFS_MAXREXMIT)
285 nmp->nm_retry = NFS_MAXREXMIT;
286 }
287
288 if (argp->flags & NFSMNT_NFSV3) {
289 if (argp->sotype == SOCK_DGRAM)
290 maxio = NFS_MAXDGRAMDATA;
291 else
292 maxio = NFS_MAXDATA;
293 } else
294 maxio = NFS_V2MAXDATA;
295
296 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
297 nmp->nm_wsize = argp->wsize;
298 /* Round down to multiple of blocksize */
299 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
300 if (nmp->nm_wsize <= 0)
301 nmp->nm_wsize = NFS_FABLKSIZE;
302 }
303 if (nmp->nm_wsize > maxio)
304 nmp->nm_wsize = maxio;
305 if (nmp->nm_wsize > MAXBSIZE)
306 nmp->nm_wsize = MAXBSIZE;
307
308 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
309 nmp->nm_rsize = argp->rsize;
310 /* Round down to multiple of blocksize */
311 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
312 if (nmp->nm_rsize <= 0)
313 nmp->nm_rsize = NFS_FABLKSIZE;
314 }
315 if (nmp->nm_rsize > maxio)
316 nmp->nm_rsize = maxio;
317 if (nmp->nm_rsize > MAXBSIZE)
318 nmp->nm_rsize = MAXBSIZE;
319
320 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
321 nmp->nm_readdirsize = argp->readdirsize;
322 }
323 if (nmp->nm_readdirsize > maxio)
324 nmp->nm_readdirsize = maxio;
325 if (nmp->nm_readdirsize > nmp->nm_rsize)
326 nmp->nm_readdirsize = nmp->nm_rsize;
327
328 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
329 nmp->nm_acregmin = argp->acregmin;
330 else
331 nmp->nm_acregmin = NFS_MINATTRTIMO;
332 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
333 nmp->nm_acregmax = argp->acregmax;
334 else
335 nmp->nm_acregmax = NFS_MAXATTRTIMO;
336 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
337 nmp->nm_acdirmin = argp->acdirmin;
338 else
339 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
340 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
341 nmp->nm_acdirmax = argp->acdirmax;
342 else
343 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
344 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
345 nmp->nm_acdirmin = nmp->nm_acdirmax;
346 if (nmp->nm_acregmin > nmp->nm_acregmax)
347 nmp->nm_acregmin = nmp->nm_acregmax;
348
349 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
350 if (argp->maxgrouplist <= NFS_MAXGRPS)
351 nmp->nm_numgrps = argp->maxgrouplist;
352 else
353 nmp->nm_numgrps = NFS_MAXGRPS;
354 }
355 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
356 if (argp->readahead <= NFS_MAXRAHEAD)
357 nmp->nm_readahead = argp->readahead;
358 else
359 nmp->nm_readahead = NFS_MAXRAHEAD;
360 }
361 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
362 if (argp->deadthresh <= NFS_MAXDEADTHRESH)
363 nmp->nm_deadthresh = argp->deadthresh;
364 else
365 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
366 }
367
368 adjsock |= ((nmp->nm_sotype != argp->sotype) ||
369 (nmp->nm_soproto != argp->proto));
370 nmp->nm_sotype = argp->sotype;
371 nmp->nm_soproto = argp->proto;
372
373 if (nmp->nm_rpcclnt.rc_so && adjsock) {
374 nfs_safedisconnect(nmp);
375 if (nmp->nm_sotype == SOCK_DGRAM) {
376 while (nfs4_connect(nmp)) {
377 printf("nfs_args: retrying connect\n");
378 (void) tsleep((caddr_t)&lbolt,
379 PSOCK, "nfscon", 0);
380 }
381 }
382 }
383 }
384
385 /*
386 * VFS Operations.
387 *
388 * mount system call
389 * It seems a bit dumb to copyinstr() the host and path here and then
390 * bcopy() them in mountnfs(), but I wanted to detect errors before
391 * doing the sockargs() call because sockargs() allocates an mbuf and
392 * an error after that means that I have to release the mbuf.
393 */
394 /* ARGSUSED */
395 static int
396 nfs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
397 {
398 struct nfs_args args;
399 int error;
400
401 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
402 if (error)
403 return (error);
404
405 ma = mount_arg(ma, "nfs_args", &args, sizeof args);
406
407 error = kernel_mount(ma, flags);
408
409 return (error);
410 }
411
412 static int
413 nfs_mount(struct mount *mp, struct thread *td)
414 {
415 int error;
416 struct nfs_args args;
417 struct sockaddr *nam;
418 struct vnode *vp;
419 char hst[MNAMELEN];
420 size_t len;
421
422 if (mp->mnt_flag & MNT_ROOTFS) {
423 printf("NFSv4: nfs_mountroot not supported\n");
424 return EINVAL;
425 }
426 error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, sizeof args);
427 if (error)
428 return (error);
429
430 if (args.version != NFS_ARGSVERSION)
431 return (EPROGMISMATCH);
432 if (mp->mnt_flag & MNT_UPDATE) {
433 struct nfsmount *nmp = VFSTONFS(mp);
434
435 if (nmp == NULL)
436 return (EIO);
437 /*
438 * When doing an update, we can't change from or to
439 * v3, switch lockd strategies or change cookie translation
440 */
441 args.flags = (args.flags &
442 ~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) |
443 (nmp->nm_flag &
444 (NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD));
445 nfs_decode_args(nmp, &args);
446 return (0);
447 }
448
449 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
450 if (error)
451 return (error);
452 bzero(&hst[len], MNAMELEN - len);
453 /* sockargs() call must be after above copyin() calls */
454 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
455 if (error)
456 return (error);
457 error = mountnfs(&args, mp, nam, hst, &vp, td->td_ucred);
458 return (error);
459 }
460
461 /*
462 * renew should be done async
463 * should re-scan mount queue each time
464 */
465 struct proc *nfs4_daemonproc;
466
467 static int
468 nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred)
469 {
470 struct nfs4_compound cp;
471 struct mbuf *mreq, *mrep = NULL, *md, *mb;
472 caddr_t bpos, dpos;
473 int error;
474
475 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t));
476 mb = mreq;
477 bpos = mtod(mb, caddr_t);
478
479 nfs_v4initcompound(&cp);
480
481 nfsm_v4build_compound(&cp, "nfs4_do_renew()");
482 nfsm_v4build_renew(&cp, nmp->nm_clientid);
483 nfsm_v4build_finalize(&cp);
484
485 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
486 if (error != 0)
487 goto nfsmout;
488
489 nfsm_v4dissect_compound(&cp);
490 nfsm_v4dissect_renew(&cp);
491 nmp->nm_last_renewal = time_second;
492 return (0);
493
494 nfsmout:
495 error = nfs_v4postop(&cp, error);
496
497 /* XXX */
498 if (mrep != NULL)
499 m_freem(mrep);
500 return (error);
501 }
502
503 static void
504 nfs4_daemon(void *arg)
505 {
506 struct mount *mp;
507 struct nfsmount *nmp;
508 int nmounts;
509
510 while (1) {
511 nmounts = 0;
512 mtx_lock(&mountlist_mtx);
513 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
514 if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0)
515 continue;
516 nmounts++;
517 nmp = VFSTONFS(mp);
518 if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4)
519 continue;
520 mtx_unlock(&mountlist_mtx);
521 mtx_lock(&Giant);
522 nfs4_do_renew(nmp, (struct ucred *) arg);
523 mtx_unlock(&Giant);
524 mtx_lock(&mountlist_mtx);
525 }
526 mtx_unlock(&mountlist_mtx);
527
528 /* Must kill the daemon here, or module unload will cause a panic */
529 if (nmounts == 0) {
530 mtx_lock(&Giant);
531 nfs4_daemonproc = NULL;
532 mtx_unlock(&Giant);
533 /*printf("nfsv4 renewd exiting\n");*/
534 kthread_exit(0);
535 }
536 tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz);
537 }
538 }
539
540 /*
541 * Common code for mount and mountroot
542 */
543 static int
544 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
545 char *hst, struct vnode **vpp, struct ucred *cred)
546 {
547 struct nfsmount *nmp;
548 char *rpth, *cp1, *cp2;
549 int nlkup = 0, error;
550 struct nfs4_compound cp;
551 struct mbuf *mreq, *mrep = NULL, *md, *mb;
552 caddr_t bpos, dpos;
553 struct nfs4_oparg_lookup lkup;
554 struct nfs4_oparg_getfh gfh;
555 struct nfs4_oparg_getattr ga;
556 struct thread *td = curthread; /* XXX */
557
558 if (mp->mnt_flag & MNT_UPDATE) {
559 nmp = VFSTONFS(mp);
560 /* update paths, file handles, etc, here XXX */
561 FREE(nam, M_SONAME);
562 return (0);
563 } else {
564 nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
565 bzero((caddr_t)nmp, sizeof (struct nfsmount));
566 TAILQ_INIT(&nmp->nm_bufq);
567 mp->mnt_data = (qaddr_t)nmp;
568 }
569
570 vfs_getnewfsid(mp);
571 nmp->nm_mountp = mp;
572 nmp->nm_maxfilesize = 0xffffffffLL;
573 nmp->nm_timeo = NFS_TIMEO;
574 nmp->nm_retry = NFS_RETRANS;
575 nmp->nm_wsize = NFS_WSIZE;
576 nmp->nm_rsize = NFS_RSIZE;
577 nmp->nm_readdirsize = NFS_READDIRSIZE;
578 nmp->nm_numgrps = NFS_MAXGRPS;
579 nmp->nm_readahead = NFS_DEFRAHEAD;
580 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
581 vfs_mountedfrom(mp, hst);
582 nmp->nm_nam = nam;
583 /* Set up the sockets and per-host congestion */
584 nmp->nm_sotype = argp->sotype;
585 nmp->nm_soproto = argp->proto;
586 nmp->nm_rpcops = &nfs4_rpcops;
587 /* XXX */
588 mp->mnt_stat.f_iosize = PAGE_SIZE;
589
590 argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
591
592 nfs_decode_args(nmp, argp);
593
594 if ((error = nfs4_connect(nmp)))
595 goto bad;
596
597 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
598 mb = mreq;
599 bpos = mtod(mb, caddr_t);
600
601 ga.bm = &nfsv4_fsinfobm;
602 nfs_v4initcompound(&cp);
603
604 /* Get remote path */
605 rpth = hst;
606 strsep(&rpth, ":");
607
608 nfsm_v4build_compound(&cp, "mountnfs()");
609 nfsm_v4build_putrootfh(&cp);
610 for (cp1 = rpth; cp1 && *cp1; cp1 = cp2) {
611 while (*cp1 == '/')
612 cp1++;
613 if (!*cp1)
614 break;
615 for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++)
616 ;
617 lkup.name = cp1;
618 lkup.namelen = cp2 - cp1;
619 nfsm_v4build_lookup(&cp, &lkup);
620 nlkup++;
621 }
622 nfsm_v4build_getfh(&cp, &gfh);
623 nfsm_v4build_getattr(&cp, &ga);
624 nfsm_v4build_finalize(&cp);
625
626 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred);
627 if (error != 0)
628 goto nfsmout;
629
630 nfsm_v4dissect_compound(&cp);
631 nfsm_v4dissect_putrootfh(&cp);
632 while (nlkup--)
633 nfsm_v4dissect_lookup(&cp);
634 nfsm_v4dissect_getfh(&cp, &gfh);
635 nfsm_v4dissect_getattr(&cp, &ga);
636
637 nfs4_vfsop_fsinfo(&ga.fa, nmp);
638 nmp->nm_state |= NFSSTA_GOTFSINFO;
639
640 /* Copy root fh into nfsmount. */
641 nmp->nm_fhsize = gfh.fh_len;
642 bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize);
643 nmp->nm_last_renewal = time_second;
644
645 if ((error = nfs4_do_setclientid(nmp, cred)) != 0)
646 goto nfsmout;
647
648 /* Start renewd if it isn't already running */
649 if (nfs4_daemonproc == NULL)
650 kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc,
651 (RFPROC|RFMEM), 0, "nfs4rd");
652
653 return (0);
654 nfsmout:
655 error = nfs_v4postop(&cp, error);
656
657 /* XXX */
658 if (mrep != NULL)
659 m_freem(mrep);
660 bad:
661 nfs4_disconnect(nmp);
662 uma_zfree(nfsmount_zone, nmp);
663 FREE(nam, M_SONAME);
664
665 return (error);
666 }
667
668 /*
669 * unmount system call
670 */
671 static int
672 nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
673 {
674 struct nfsmount *nmp;
675 int error, flags = 0;
676
677 if (mntflags & MNT_FORCE)
678 flags |= FORCECLOSE;
679 nmp = VFSTONFS(mp);
680 /*
681 * Goes something like this..
682 * - Call vflush(, td) to clear out vnodes for this filesystem
683 * - Close the socket
684 * - Free up the data structures
685 */
686 /* In the forced case, cancel any outstanding requests. */
687 if (flags & FORCECLOSE) {
688 error = nfs_nmcancelreqs(nmp);
689 if (error)
690 return (error);
691 nfs4dev_purge();
692 }
693
694 error = vflush(mp, 0, flags, td);
695 if (error)
696 return (error);
697
698 /*
699 * We are now committed to the unmount.
700 */
701 nfs4_disconnect(nmp);
702 FREE(nmp->nm_nam, M_SONAME);
703
704 /* XXX there's a race condition here for SMP */
705 wakeup(&nfs4_daemonproc);
706
707 uma_zfree(nfsmount_zone, nmp);
708 return (0);
709 }
710
711 /*
712 * Return root of a filesystem
713 */
714 static int
715 nfs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td)
716 {
717 struct vnode *vp;
718 struct nfsmount *nmp;
719 struct nfsnode *np;
720 int error;
721
722 nmp = VFSTONFS(mp);
723 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
724 if (error)
725 return (error);
726 vp = NFSTOV(np);
727 if (vp->v_type == VNON)
728 vp->v_type = VDIR;
729 vp->v_vflag |= VV_ROOT;
730 *vpp = vp;
731
732 return (0);
733 }
734
735 /*
736 * Flush out the buffer cache
737 */
738 /* ARGSUSED */
739 static int
740 nfs_sync(struct mount *mp, int waitfor, struct thread *td)
741 {
742 struct vnode *vp, *mvp;
743 int error, allerror = 0;
744
745 /*
746 * Force stale buffer cache information to be flushed.
747 */
748 MNT_ILOCK(mp);
749 loop:
750 MNT_VNODE_FOREACH(vp, mp, mvp) {
751 VI_LOCK(vp);
752 MNT_IUNLOCK(mp);
753 if (VOP_ISLOCKED(vp, NULL) ||
754 vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
755 waitfor == MNT_LAZY) {
756 VI_UNLOCK(vp);
757 MNT_ILOCK(mp);
758 continue;
759 }
760 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
761 MNT_ILOCK(mp);
762 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
763 goto loop;
764 }
765 error = VOP_FSYNC(vp, waitfor, td);
766 if (error)
767 allerror = error;
768 VOP_UNLOCK(vp, 0, td);
769 vrele(vp);
770
771 MNT_ILOCK(mp);
772 }
773 MNT_IUNLOCK(mp);
774 return (allerror);
775 }
776
777 static int
778 nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
779 {
780 struct nfs4_oparg_setclientid scid;
781 struct nfs4_compound cp;
782 struct mbuf *mreq, *mrep = NULL, *md, *mb;
783 caddr_t bpos, dpos;
784 struct route ro;
785 char *ipsrc = NULL, uaddr[24], name[24];
786 int try = 0;
787 static unsigned long seq;
788 int error;
789
790 #ifndef NFS4_USE_RPCCLNT
791 return (0);
792 #endif
793 if (nmp->nm_clientid) {
794 printf("nfs4_do_setclientid: already have clientid!\n");
795 error = 0;
796 goto nfsmout;
797 }
798
799 /* Try not to re-use clientids */
800 if (seq == 0)
801 seq = time_second;
802
803 #ifdef NFS4_USE_RPCCLNT
804 scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
805 #endif
806 scid.cb_netid = "tcp";
807 scid.cb_netidlen = 3;
808 scid.cb_prog = 0x1234; /* XXX */
809
810 /* Do a route lookup to find our source address for talking to this server */
811 bzero(&ro, sizeof ro);
812
813 #ifdef NFS4_USE_RPCCLNT
814 ro.ro_dst = *nmp->nm_rpcclnt.rc_name;
815 #endif
816 rtalloc(&ro);
817 if (ro.ro_rt == NULL) {
818 error = EHOSTUNREACH;
819 goto nfsmout;
820 }
821 ipsrc = inet_ntoa(IA_SIN(ifatoia(ro.ro_rt->rt_ifa))->sin_addr);
822 sprintf(uaddr, "%s.12.48", ipsrc);
823 scid.cb_univaddr = uaddr;
824 scid.cb_univaddrlen = strlen(uaddr);
825 RTFREE(ro.ro_rt);
826
827 try_again:
828 sprintf(name, "%s-%d", ipsrc, (int) ((seq + try) % 1000000L));
829 scid.namelen = strlen(name);
830 scid.name = name;
831 nfs_v4initcompound(&cp);
832
833 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
834 mb = mreq;
835 bpos = mtod(mb, caddr_t);
836
837 nfsm_v4build_compound(&cp, "nfs4_do_setclientid()");
838 nfsm_v4build_setclientid(&cp, &scid);
839 nfsm_v4build_finalize(&cp);
840
841 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
842 if (error != 0)
843 goto nfsmout;
844
845 nfsm_v4dissect_compound(&cp);
846 nfsm_v4dissect_setclientid(&cp, &scid);
847 nmp->nm_clientid = scid.clientid;
848
849 error = nfs_v4postop(&cp, error);
850
851 /* Confirm */
852 m_freem(mrep);
853 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
854 mb = mreq;
855 bpos = mtod(mb, caddr_t);
856
857 nfs_v4initcompound(&cp);
858
859 nfsm_v4build_compound(&cp, "nfs4_do_setclientid() (confirm)");
860 nfsm_v4build_setclientid_confirm(&cp, &scid);
861 nfsm_v4build_finalize(&cp);
862
863 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
864 if (error != 0)
865 goto nfsmout;
866
867 nfsm_v4dissect_compound(&cp);
868 nfsm_v4dissect_setclientid_confirm(&cp);
869
870 nfsmout:
871 error = nfs_v4postop(&cp, error);
872
873 if (mrep)
874 m_freem(mrep);
875 if (error == NFSERR_CLID_INUSE && (++try < NFS4_SETCLIENTID_MAXTRIES))
876 goto try_again;
877
878 return (error);
879 }
Cache object: 227ee4a1a86bad7141e960cf53e3c123
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