Register keyword removal
[dragonfly.git] / sys / vfs / nfs / nfs_vfsops.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1989, 1993, 1995
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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
37 * $FreeBSD: src/sys/nfs/nfs_vfsops.c,v 1.91.2.7 2003/01/27 20:04:08 dillon Exp $
40393ded 38 * $DragonFly: src/sys/vfs/nfs/nfs_vfsops.c,v 1.6 2003/07/26 21:48:49 rob Exp $
984263bc
MD
39 */
40
41#include "opt_bootp.h"
42
43#include <sys/param.h>
44#include <sys/sockio.h>
45#include <sys/proc.h>
46#include <sys/vnode.h>
47#include <sys/kernel.h>
48#include <sys/sysctl.h>
49#include <sys/malloc.h>
50#include <sys/mount.h>
51#include <sys/mbuf.h>
52#include <sys/socket.h>
53#include <sys/socketvar.h>
54#include <sys/systm.h>
55
56#include <vm/vm.h>
57#include <vm/vm_extern.h>
58#include <vm/vm_zone.h>
59
60#include <net/if.h>
61#include <net/route.h>
62#include <netinet/in.h>
63
64#include <nfs/rpcv2.h>
65#include <nfs/nfsproto.h>
66#include <nfs/nfs.h>
67#include <nfs/nfsnode.h>
68#include <nfs/nfsmount.h>
69#include <nfs/xdr_subs.h>
70#include <nfs/nfsm_subs.h>
71#include <nfs/nfsdiskless.h>
72#include <nfs/nqnfs.h>
73
74extern int nfs_mountroot __P((struct mount *mp));
75
76extern int nfs_ticks;
77
78MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header");
79MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle");
80MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure");
81MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data");
82MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor");
83MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure");
84MALLOC_DEFINE(M_NQLEASE, "NQNFS Lease", "Nqnfs lease");
85MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables");
86
87vm_zone_t nfsmount_zone;
88
89struct nfsstats nfsstats;
90SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
91SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
92 &nfsstats, nfsstats, "");
93static int nfs_ip_paranoia = 1;
94SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
95 &nfs_ip_paranoia, 0, "");
96#ifdef NFS_DEBUG
97int nfs_debug;
98SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, "");
99#endif
100
101static int nfs_iosize __P((struct nfsmount *nmp));
102static void nfs_decode_args __P((struct nfsmount *nmp,
103 struct nfs_args *argp));
104static int mountnfs __P((struct nfs_args *,struct mount *,
105 struct sockaddr *,char *,char *,struct vnode **));
106static int nfs_mount __P(( struct mount *mp, char *path, caddr_t data,
dadab5e9 107 struct nameidata *ndp, struct thread *td));
984263bc 108static int nfs_unmount __P(( struct mount *mp, int mntflags,
dadab5e9 109 struct thread *td));
984263bc
MD
110static int nfs_root __P(( struct mount *mp, struct vnode **vpp));
111static int nfs_statfs __P(( struct mount *mp, struct statfs *sbp,
dadab5e9 112 struct thread *td));
984263bc 113static int nfs_sync __P(( struct mount *mp, int waitfor,
3b568787 114 struct thread *td));
984263bc
MD
115
116/*
117 * nfs vfs operations.
118 */
119static struct vfsops nfs_vfsops = {
120 nfs_mount,
121 vfs_stdstart,
122 nfs_unmount,
123 nfs_root,
124 vfs_stdquotactl,
125 nfs_statfs,
126 nfs_sync,
127 vfs_stdvget,
128 vfs_stdfhtovp, /* shouldn't happen */
129 vfs_stdcheckexp,
130 vfs_stdvptofh, /* shouldn't happen */
131 nfs_init,
132 nfs_uninit,
133 vfs_stdextattrctl,
134};
135VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK);
136
137/*
138 * This structure must be filled in by a primary bootstrap or bootstrap
139 * server for a diskless/dataless machine. It is initialized below just
140 * to ensure that it is allocated to initialized data (.data not .bss).
141 */
142struct nfs_diskless nfs_diskless = { { { 0 } } };
143struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
144int nfs_diskless_valid = 0;
145
146SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
147 &nfs_diskless_valid, 0, "");
148
149SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
150 nfsv3_diskless.root_hostnam, 0, "");
151
152SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
153 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr,
154 "%Ssockaddr_in", "");
155
156SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD,
157 nfsv3_diskless.swap_hostnam, 0, "");
158
159SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD,
160 &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr,
161 "%Ssockaddr_in","");
162
163
164void nfsargs_ntoh __P((struct nfs_args *));
165static int nfs_mountdiskless __P((char *, char *, int,
166 struct sockaddr_in *, struct nfs_args *,
dadab5e9 167 struct thread *, struct vnode **,
984263bc
MD
168 struct mount **));
169static void nfs_convert_diskless __P((void));
170static void nfs_convert_oargs __P((struct nfs_args *args,
171 struct onfs_args *oargs));
172
173static int
174nfs_iosize(nmp)
175 struct nfsmount* nmp;
176{
177 int iosize;
178
179 /*
180 * Calculate the size used for io buffers. Use the larger
181 * of the two sizes to minimise nfs requests but make sure
182 * that it is at least one VM page to avoid wasting buffer
183 * space.
184 */
185 iosize = max(nmp->nm_rsize, nmp->nm_wsize);
186 if (iosize < PAGE_SIZE) iosize = PAGE_SIZE;
187 return iosize;
188}
189
190static void
191nfs_convert_oargs(args, oargs)
192 struct nfs_args *args;
193 struct onfs_args *oargs;
194{
195 args->version = NFS_ARGSVERSION;
196 args->addr = oargs->addr;
197 args->addrlen = oargs->addrlen;
198 args->sotype = oargs->sotype;
199 args->proto = oargs->proto;
200 args->fh = oargs->fh;
201 args->fhsize = oargs->fhsize;
202 args->flags = oargs->flags;
203 args->wsize = oargs->wsize;
204 args->rsize = oargs->rsize;
205 args->readdirsize = oargs->readdirsize;
206 args->timeo = oargs->timeo;
207 args->retrans = oargs->retrans;
208 args->maxgrouplist = oargs->maxgrouplist;
209 args->readahead = oargs->readahead;
210 args->leaseterm = oargs->leaseterm;
211 args->deadthresh = oargs->deadthresh;
212 args->hostname = oargs->hostname;
213}
214
215static void
216nfs_convert_diskless()
217{
218 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif,
219 sizeof(struct ifaliasreq));
220 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway,
221 sizeof(struct sockaddr_in));
222 nfs_convert_oargs(&nfsv3_diskless.swap_args,&nfs_diskless.swap_args);
223 nfsv3_diskless.swap_fhsize = NFSX_V2FH;
224 bcopy(nfs_diskless.swap_fh,nfsv3_diskless.swap_fh,NFSX_V2FH);
225 bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr,
226 sizeof(struct sockaddr_in));
227 bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN);
228 nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks;
229 bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred,
230 sizeof(struct ucred));
231 nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args);
232 nfsv3_diskless.root_fhsize = NFSX_V2FH;
233 bcopy(nfs_diskless.root_fh,nfsv3_diskless.root_fh,NFSX_V2FH);
234 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr,
235 sizeof(struct sockaddr_in));
236 bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN);
237 nfsv3_diskless.root_time = nfs_diskless.root_time;
238 bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam,
239 MAXHOSTNAMELEN);
240 nfs_diskless_valid = 3;
241}
242
243/*
244 * nfs statfs call
245 */
246int
dadab5e9 247nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
984263bc 248{
40393ded
RG
249 struct vnode *vp;
250 struct nfs_statfs *sfp;
251 caddr_t cp;
252 u_int32_t *tl;
253 int32_t t1, t2;
984263bc
MD
254 caddr_t bpos, dpos, cp2;
255 struct nfsmount *nmp = VFSTONFS(mp);
256 int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr;
257 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
258 struct ucred *cred;
259 struct nfsnode *np;
260 u_quad_t tquad;
261
262#ifndef nolint
263 sfp = (struct nfs_statfs *)0;
264#endif
265 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
266 if (error)
267 return (error);
268 vp = NFSTOV(np);
269 cred = crget();
270 cred->cr_ngroups = 1;
271 if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
3b568787 272 (void)nfs_fsinfo(nmp, vp, td);
984263bc
MD
273 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
274 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3));
275 nfsm_fhtom(vp, v3);
dadab5e9 276 nfsm_request(vp, NFSPROC_FSSTAT, td, cred);
984263bc
MD
277 if (v3)
278 nfsm_postop_attr(vp, retattr);
279 if (error) {
280 if (mrep != NULL)
281 m_freem(mrep);
282 goto nfsmout;
283 }
284 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3));
285 sbp->f_flags = nmp->nm_flag;
286 sbp->f_iosize = nfs_iosize(nmp);
287 if (v3) {
288 sbp->f_bsize = NFS_FABLKSIZE;
289 tquad = fxdr_hyper(&sfp->sf_tbytes);
290 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
291 tquad = fxdr_hyper(&sfp->sf_fbytes);
292 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
293 tquad = fxdr_hyper(&sfp->sf_abytes);
294 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
295 sbp->f_files = (fxdr_unsigned(int32_t,
296 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
297 sbp->f_ffree = (fxdr_unsigned(int32_t,
298 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
299 } else {
300 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
301 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
302 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
303 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
304 sbp->f_files = 0;
305 sbp->f_ffree = 0;
306 }
307 if (sbp != &mp->mnt_stat) {
308 sbp->f_type = mp->mnt_vfc->vfc_typenum;
309 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
310 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
311 }
312 nfsm_reqdone;
313 vput(vp);
314 crfree(cred);
315 return (error);
316}
317
318/*
319 * nfs version 3 fsinfo rpc call
320 */
321int
3b568787 322nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td)
984263bc 323{
40393ded
RG
324 struct nfsv3_fsinfo *fsp;
325 caddr_t cp;
326 int32_t t1, t2;
327 u_int32_t *tl, pref, max;
984263bc
MD
328 caddr_t bpos, dpos, cp2;
329 int error = 0, retattr;
330 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
331 u_int64_t maxfsize;
332
333 nfsstats.rpccnt[NFSPROC_FSINFO]++;
334 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1));
335 nfsm_fhtom(vp, 1);
3b568787 336 nfsm_request(vp, NFSPROC_FSINFO, td, NFSVPCRED(vp));
984263bc
MD
337 nfsm_postop_attr(vp, retattr);
338 if (!error) {
339 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO);
340 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
341 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
342 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
343 ~(NFS_FABLKSIZE - 1);
344 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
345 if (max < nmp->nm_wsize && max > 0) {
346 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
347 if (nmp->nm_wsize == 0)
348 nmp->nm_wsize = max;
349 }
350 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
351 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
352 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
353 ~(NFS_FABLKSIZE - 1);
354 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
355 if (max < nmp->nm_rsize && max > 0) {
356 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
357 if (nmp->nm_rsize == 0)
358 nmp->nm_rsize = max;
359 }
360 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
361 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ)
362 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
363 ~(NFS_DIRBLKSIZ - 1);
364 if (max < nmp->nm_readdirsize && max > 0) {
365 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
366 if (nmp->nm_readdirsize == 0)
367 nmp->nm_readdirsize = max;
368 }
369 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
370 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
371 nmp->nm_maxfilesize = maxfsize;
372 nmp->nm_state |= NFSSTA_GOTFSINFO;
373 }
374 nfsm_reqdone;
375 return (error);
376}
377
378/*
379 * Mount a remote root fs via. nfs. This depends on the info in the
380 * nfs_diskless structure that has been filled in properly by some primary
381 * bootstrap.
382 * It goes something like this:
383 * - do enough of "ifconfig" by calling ifioctl() so that the system
384 * can talk to the server
385 * - If nfs_diskless.mygateway is filled in, use that address as
386 * a default gateway.
387 * - build the rootfs mount point and call mountnfs() to do the rest.
388 */
389int
390nfs_mountroot(mp)
391 struct mount *mp;
392{
393 struct mount *swap_mp;
394 struct nfsv3_diskless *nd = &nfsv3_diskless;
395 struct socket *so;
396 struct vnode *vp;
dadab5e9 397 struct thread *td = curthread; /* XXX */
984263bc
MD
398 int error, i;
399 u_long l;
400 char buf[128];
401
402#if defined(BOOTP_NFSROOT) && defined(BOOTP)
403 bootpc_init(); /* use bootp to get nfs_diskless filled in */
404#endif
405
406 /*
407 * XXX time must be non-zero when we init the interface or else
408 * the arp code will wedge...
409 */
410 while (time_second == 0)
377d4740 411 tsleep(&time_second, 0, "arpkludge", 10);
984263bc
MD
412
413 if (nfs_diskless_valid==1)
414 nfs_convert_diskless();
415
416 /*
417 * XXX splnet, so networks will receive...
418 */
419 splnet();
420
421#ifdef notyet
422 /* Set up swap credentials. */
423 proc0.p_ucred->cr_uid = ntohl(nd->swap_ucred.cr_uid);
424 proc0.p_ucred->cr_gid = ntohl(nd->swap_ucred.cr_gid);
425 if ((proc0.p_ucred->cr_ngroups = ntohs(nd->swap_ucred.cr_ngroups)) >
426 NGROUPS)
427 proc0.p_ucred->cr_ngroups = NGROUPS;
428 for (i = 0; i < proc0.p_ucred->cr_ngroups; i++)
429 proc0.p_ucred->cr_groups[i] = ntohl(nd->swap_ucred.cr_groups[i]);
430#endif
431
432 /*
433 * Do enough of ifconfig(8) so that the critical net interface can
434 * talk to the server.
435 */
dadab5e9 436 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td);
984263bc
MD
437 if (error)
438 panic("nfs_mountroot: socreate(%04x): %d",
439 nd->myif.ifra_addr.sa_family, error);
440
441#if 0 /* XXX Bad idea */
442 /*
443 * We might not have been told the right interface, so we pass
444 * over the first ten interfaces of the same kind, until we get
445 * one of them configured.
446 */
447
448 for (i = strlen(nd->myif.ifra_name) - 1;
449 nd->myif.ifra_name[i] >= '0' &&
450 nd->myif.ifra_name[i] <= '9';
451 nd->myif.ifra_name[i] ++) {
dadab5e9 452 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
984263bc
MD
453 if(!error)
454 break;
455 }
456#endif
dadab5e9 457 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
984263bc
MD
458 if (error)
459 panic("nfs_mountroot: SIOCAIFADDR: %d", error);
460 soclose(so);
461
462 /*
463 * If the gateway field is filled in, set it as the default route.
464 */
465 if (nd->mygateway.sin_len != 0) {
466 struct sockaddr_in mask, sin;
467
468 bzero((caddr_t)&mask, sizeof(mask));
469 sin = mask;
470 sin.sin_family = AF_INET;
471 sin.sin_len = sizeof(sin);
472 error = rtrequest(RTM_ADD, (struct sockaddr *)&sin,
473 (struct sockaddr *)&nd->mygateway,
474 (struct sockaddr *)&mask,
475 RTF_UP | RTF_GATEWAY, (struct rtentry **)0);
476 if (error)
477 panic("nfs_mountroot: RTM_ADD: %d", error);
478 }
479
480 /*
481 * Create the rootfs mount point.
482 */
483 nd->root_args.fh = nd->root_fh;
484 nd->root_args.fhsize = nd->root_fhsize;
485 l = ntohl(nd->root_saddr.sin_addr.s_addr);
486 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
487 (l >> 24) & 0xff, (l >> 16) & 0xff,
488 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
489 printf("NFS ROOT: %s\n",buf);
490 if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY,
dadab5e9 491 &nd->root_saddr, &nd->root_args, td, &vp, &mp)) != 0) {
984263bc
MD
492 if (swap_mp) {
493 mp->mnt_vfc->vfc_refcount--;
494 free(swap_mp, M_MOUNT);
495 }
496 return (error);
497 }
498
499 swap_mp = NULL;
500 if (nd->swap_nblks) {
501
502 /* Convert to DEV_BSIZE instead of Kilobyte */
503 nd->swap_nblks *= 2;
504
505 /*
506 * Create a fake mount point just for the swap vnode so that the
507 * swap file can be on a different server from the rootfs.
508 */
509 nd->swap_args.fh = nd->swap_fh;
510 nd->swap_args.fhsize = nd->swap_fhsize;
511 l = ntohl(nd->swap_saddr.sin_addr.s_addr);
512 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
513 (l >> 24) & 0xff, (l >> 16) & 0xff,
514 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
515 printf("NFS SWAP: %s\n",buf);
516 if ((error = nfs_mountdiskless(buf, "/swap", 0,
dadab5e9 517 &nd->swap_saddr, &nd->swap_args, td, &vp, &swap_mp)) != 0)
984263bc 518 return (error);
dadab5e9 519 vfs_unbusy(swap_mp, td);
984263bc
MD
520
521 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
522 nd->swap_nblks * DEV_BSIZE ;
523
524 /*
525 * Since the swap file is not the root dir of a file system,
526 * hack it to a regular file.
527 */
528 vp->v_type = VREG;
529 vp->v_flag = 0;
530 VREF(vp);
dadab5e9 531 swaponvp(td, vp, NODEV, nd->swap_nblks);
984263bc
MD
532 }
533
534 mp->mnt_flag |= MNT_ROOTFS;
535 mp->mnt_vnodecovered = NULLVP;
536 rootvp = vp;
dadab5e9 537 vfs_unbusy(mp, td);
984263bc
MD
538
539 /*
540 * This is not really an nfs issue, but it is much easier to
541 * set hostname here and then let the "/etc/rc.xxx" files
542 * mount the right /var based upon its preset value.
543 */
544 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN);
545 hostname[MAXHOSTNAMELEN - 1] = '\0';
546 for (i = 0; i < MAXHOSTNAMELEN; i++)
547 if (hostname[i] == '\0')
548 break;
549 inittodr(ntohl(nd->root_time));
550 return (0);
551}
552
553/*
554 * Internal version of mount system call for diskless setup.
555 */
556static int
dadab5e9
MD
557nfs_mountdiskless(char *path, char *which, int mountflag,
558 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
559 struct vnode **vpp, struct mount **mpp)
984263bc
MD
560{
561 struct mount *mp;
562 struct sockaddr *nam;
563 int error;
564 int didalloc = 0;
565
566 mp = *mpp;
567
568 if (mp == NULL) {
569 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) {
570 printf("nfs_mountroot: NFS not configured");
571 return (error);
572 }
573 didalloc = 1;
574 }
575
576 mp->mnt_kern_flag = 0;
577 mp->mnt_flag = mountflag;
578 nam = dup_sockaddr((struct sockaddr *)sin, 1);
579 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) {
580 printf("nfs_mountroot: mount %s on %s: %d", path, which, error);
581 mp->mnt_vfc->vfc_refcount--;
dadab5e9 582 vfs_unbusy(mp, td);
984263bc
MD
583 if (didalloc)
584 free(mp, M_MOUNT);
585 FREE(nam, M_SONAME);
586 return (error);
587 }
588 (void) copystr(which, mp->mnt_stat.f_mntonname, MNAMELEN - 1, 0);
589 *mpp = mp;
590 return (0);
591}
592
593static void
594nfs_decode_args(nmp, argp)
595 struct nfsmount *nmp;
596 struct nfs_args *argp;
597{
598 int s;
599 int adjsock;
600 int maxio;
601
602 s = splnet();
603 /*
604 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
605 * no sense in that context.
606 */
607 if (argp->sotype == SOCK_STREAM)
608 nmp->nm_flag &= ~NFSMNT_NOCONN;
609
610 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */
611 if ((argp->flags & NFSMNT_NFSV3) == 0)
612 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
613
614 /* Re-bind if rsrvd port requested and wasn't on one */
615 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
616 && (argp->flags & NFSMNT_RESVPORT);
617 /* Also re-bind if we're switching to/from a connected UDP socket */
618 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
619 (argp->flags & NFSMNT_NOCONN));
620
621 /* Update flags atomically. Don't change the lock bits. */
622 nmp->nm_flag = argp->flags | nmp->nm_flag;
623 splx(s);
624
625 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
626 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
627 if (nmp->nm_timeo < NFS_MINTIMEO)
628 nmp->nm_timeo = NFS_MINTIMEO;
629 else if (nmp->nm_timeo > NFS_MAXTIMEO)
630 nmp->nm_timeo = NFS_MAXTIMEO;
631 }
632
633 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
634 nmp->nm_retry = argp->retrans;
635 if (nmp->nm_retry > NFS_MAXREXMIT)
636 nmp->nm_retry = NFS_MAXREXMIT;
637 }
638
639 if (argp->flags & NFSMNT_NFSV3) {
640 if (argp->sotype == SOCK_DGRAM)
641 maxio = NFS_MAXDGRAMDATA;
642 else
643 maxio = NFS_MAXDATA;
644 } else
645 maxio = NFS_V2MAXDATA;
646
647 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
648 nmp->nm_wsize = argp->wsize;
649 /* Round down to multiple of blocksize */
650 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
651 if (nmp->nm_wsize <= 0)
652 nmp->nm_wsize = NFS_FABLKSIZE;
653 }
654 if (nmp->nm_wsize > maxio)
655 nmp->nm_wsize = maxio;
656 if (nmp->nm_wsize > MAXBSIZE)
657 nmp->nm_wsize = MAXBSIZE;
658
659 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
660 nmp->nm_rsize = argp->rsize;
661 /* Round down to multiple of blocksize */
662 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
663 if (nmp->nm_rsize <= 0)
664 nmp->nm_rsize = NFS_FABLKSIZE;
665 }
666 if (nmp->nm_rsize > maxio)
667 nmp->nm_rsize = maxio;
668 if (nmp->nm_rsize > MAXBSIZE)
669 nmp->nm_rsize = MAXBSIZE;
670
671 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
672 nmp->nm_readdirsize = argp->readdirsize;
673 }
674 if (nmp->nm_readdirsize > maxio)
675 nmp->nm_readdirsize = maxio;
676 if (nmp->nm_readdirsize > nmp->nm_rsize)
677 nmp->nm_readdirsize = nmp->nm_rsize;
678
679 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
680 nmp->nm_acregmin = argp->acregmin;
681 else
682 nmp->nm_acregmin = NFS_MINATTRTIMO;
683 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
684 nmp->nm_acregmax = argp->acregmax;
685 else
686 nmp->nm_acregmax = NFS_MAXATTRTIMO;
687 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
688 nmp->nm_acdirmin = argp->acdirmin;
689 else
690 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
691 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
692 nmp->nm_acdirmax = argp->acdirmax;
693 else
694 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
695 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
696 nmp->nm_acdirmin = nmp->nm_acdirmax;
697 if (nmp->nm_acregmin > nmp->nm_acregmax)
698 nmp->nm_acregmin = nmp->nm_acregmax;
699
700 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
701 if (argp->maxgrouplist <= NFS_MAXGRPS)
702 nmp->nm_numgrps = argp->maxgrouplist;
703 else
704 nmp->nm_numgrps = NFS_MAXGRPS;
705 }
706 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
707 if (argp->readahead <= NFS_MAXRAHEAD)
708 nmp->nm_readahead = argp->readahead;
709 else
710 nmp->nm_readahead = NFS_MAXRAHEAD;
711 }
712 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2) {
713 if (argp->leaseterm <= NQ_MAXLEASE)
714 nmp->nm_leaseterm = argp->leaseterm;
715 else
716 nmp->nm_leaseterm = NQ_MAXLEASE;
717 }
718 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) {
719 if (argp->deadthresh <= NQ_NEVERDEAD)
720 nmp->nm_deadthresh = argp->deadthresh;
721 else
722 nmp->nm_deadthresh = NQ_NEVERDEAD;
723 }
724
725 adjsock |= ((nmp->nm_sotype != argp->sotype) ||
726 (nmp->nm_soproto != argp->proto));
727 nmp->nm_sotype = argp->sotype;
728 nmp->nm_soproto = argp->proto;
729
730 if (nmp->nm_so && adjsock) {
731 nfs_safedisconnect(nmp);
732 if (nmp->nm_sotype == SOCK_DGRAM)
733 while (nfs_connect(nmp, (struct nfsreq *)0)) {
734 printf("nfs_args: retrying connect\n");
377d4740 735 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0);
984263bc
MD
736 }
737 }
738}
739
740/*
741 * VFS Operations.
742 *
743 * mount system call
744 * It seems a bit dumb to copyinstr() the host and path here and then
745 * bcopy() them in mountnfs(), but I wanted to detect errors before
746 * doing the sockargs() call because sockargs() allocates an mbuf and
747 * an error after that means that I have to release the mbuf.
748 */
749/* ARGSUSED */
750static int
dadab5e9
MD
751nfs_mount(struct mount *mp, char *path, caddr_t data,
752 struct nameidata *ndp, struct thread *td)
984263bc
MD
753{
754 int error;
755 struct nfs_args args;
756 struct sockaddr *nam;
757 struct vnode *vp;
758 char pth[MNAMELEN], hst[MNAMELEN];
759 size_t len;
760 u_char nfh[NFSX_V3FHMAX];
761
762 if (path == NULL) {
763 nfs_mountroot(mp);
764 return (0);
765 }
766 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
767 if (error)
768 return (error);
769 if (args.version != NFS_ARGSVERSION) {
770#ifdef COMPAT_PRELITE2
771 /*
772 * If the argument version is unknown, then assume the
773 * caller is a pre-lite2 4.4BSD client and convert its
774 * arguments.
775 */
776 struct onfs_args oargs;
777 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args));
778 if (error)
779 return (error);
780 nfs_convert_oargs(&args,&oargs);
781#else /* !COMPAT_PRELITE2 */
782 return (EPROGMISMATCH);
783#endif /* COMPAT_PRELITE2 */
784 }
785 if (mp->mnt_flag & MNT_UPDATE) {
40393ded 786 struct nfsmount *nmp = VFSTONFS(mp);
984263bc
MD
787
788 if (nmp == NULL)
789 return (EIO);
790 /*
791 * When doing an update, we can't change from or to
792 * v3 and/or nqnfs, or change cookie translation
793 */
794 args.flags = (args.flags &
795 ~(NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/)) |
796 (nmp->nm_flag &
797 (NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/));
798 nfs_decode_args(nmp, &args);
799 return (0);
800 }
801
802 /*
803 * Make the nfs_ip_paranoia sysctl serve as the default connection
804 * or no-connection mode for those protocols that support
805 * no-connection mode (the flag will be cleared later for protocols
806 * that do not support no-connection mode). This will allow a client
807 * to receive replies from a different IP then the request was
808 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
809 * not 0.
810 */
811 if (nfs_ip_paranoia == 0)
812 args.flags |= NFSMNT_NOCONN;
813 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
814 return (EINVAL);
815 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
816 if (error)
817 return (error);
818 error = copyinstr(path, pth, MNAMELEN-1, &len);
819 if (error)
820 return (error);
821 bzero(&pth[len], MNAMELEN - len);
822 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
823 if (error)
824 return (error);
825 bzero(&hst[len], MNAMELEN - len);
826 /* sockargs() call must be after above copyin() calls */
827 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
828 if (error)
829 return (error);
830 args.fh = nfh;
831 error = mountnfs(&args, mp, nam, pth, hst, &vp);
832 return (error);
833}
834
835/*
836 * Common code for mount and mountroot
837 */
838static int
dadab5e9
MD
839mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
840 char *pth, char *hst, struct vnode **vpp)
984263bc 841{
40393ded 842 struct nfsmount *nmp;
984263bc
MD
843 struct nfsnode *np;
844 int error;
845 struct vattr attrs;
846
847 if (mp->mnt_flag & MNT_UPDATE) {
848 nmp = VFSTONFS(mp);
849 /* update paths, file handles, etc, here XXX */
850 FREE(nam, M_SONAME);
851 return (0);
852 } else {
853 nmp = zalloc(nfsmount_zone);
854 bzero((caddr_t)nmp, sizeof (struct nfsmount));
855 TAILQ_INIT(&nmp->nm_uidlruhead);
856 TAILQ_INIT(&nmp->nm_bufq);
857 mp->mnt_data = (qaddr_t)nmp;
858 }
859 vfs_getnewfsid(mp);
860 nmp->nm_mountp = mp;
861 if (argp->flags & NFSMNT_NQNFS)
862 /*
863 * We have to set mnt_maxsymlink to a non-zero value so
864 * that COMPAT_43 routines will know that we are setting
865 * the d_type field in directories (and can zero it for
866 * unsuspecting binaries).
867 */
868 mp->mnt_maxsymlinklen = 1;
869
870 /*
871 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
872 * high, depending on whether we end up with negative offsets in
873 * the client or server somewhere. 2GB-1 may be safer.
874 *
875 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
876 * that we can handle until we find out otherwise.
877 * XXX Our "safe" limit on the client is what we can store in our
878 * buffer cache using signed(!) block numbers.
879 */
880 if ((argp->flags & NFSMNT_NFSV3) == 0)
881 nmp->nm_maxfilesize = 0xffffffffLL;
882 else
883 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
884
885 nmp->nm_timeo = NFS_TIMEO;
886 nmp->nm_retry = NFS_RETRANS;
887 nmp->nm_wsize = NFS_WSIZE;
888 nmp->nm_rsize = NFS_RSIZE;
889 nmp->nm_readdirsize = NFS_READDIRSIZE;
890 nmp->nm_numgrps = NFS_MAXGRPS;
891 nmp->nm_readahead = NFS_DEFRAHEAD;
892 nmp->nm_leaseterm = NQ_DEFLEASE;
893 nmp->nm_deadthresh = NQ_DEADTHRESH;
894 CIRCLEQ_INIT(&nmp->nm_timerhead);
895 nmp->nm_inprog = NULLVP;
896 nmp->nm_fhsize = argp->fhsize;
897 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
898 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
899 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN);
900 nmp->nm_nam = nam;
901 /* Set up the sockets and per-host congestion */
902 nmp->nm_sotype = argp->sotype;
903 nmp->nm_soproto = argp->proto;
3b568787 904 nmp->nm_cred = crhold(proc0.p_ucred);
984263bc
MD
905
906 nfs_decode_args(nmp, argp);
907
908 /*
909 * For Connection based sockets (TCP,...) defer the connect until
910 * the first request, in case the server is not responding.
911 */
912 if (nmp->nm_sotype == SOCK_DGRAM &&
913 (error = nfs_connect(nmp, (struct nfsreq *)0)))
914 goto bad;
915
916 /*
917 * This is silly, but it has to be set so that vinifod() works.
918 * We do not want to do an nfs_statfs() here since we can get
919 * stuck on a dead server and we are holding a lock on the mount
920 * point.
921 */
922 mp->mnt_stat.f_iosize = nfs_iosize(nmp);
923 /*
924 * A reference count is needed on the nfsnode representing the
925 * remote root. If this object is not persistent, then backward
926 * traversals of the mount point (i.e. "..") will not work if
927 * the nfsnode gets flushed out of the cache. Ufs does not have
928 * this problem, because one can identify root inodes by their
929 * number == ROOTINO (2).
930 */
931 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
932 if (error)
933 goto bad;
934 *vpp = NFSTOV(np);
935
936 /*
937 * Get file attributes for the mountpoint. This has the side
938 * effect of filling in (*vpp)->v_type with the correct value.
939 */
3b568787 940 VOP_GETATTR(*vpp, &attrs, curthread);
984263bc
MD
941
942 /*
943 * Lose the lock but keep the ref.
944 */
dadab5e9 945 VOP_UNLOCK(*vpp, 0, curthread);
984263bc
MD
946
947 return (0);
948bad:
949 nfs_disconnect(nmp);
3b568787 950 nfs_free_mount(nmp);
984263bc
MD
951 FREE(nam, M_SONAME);
952 return (error);
953}
954
955/*
956 * unmount system call
957 */
958static int
dadab5e9 959nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
984263bc 960{
40393ded 961 struct nfsmount *nmp;
984263bc
MD
962 int error, flags = 0;
963
964 if (mntflags & MNT_FORCE)
965 flags |= FORCECLOSE;
966 nmp = VFSTONFS(mp);
967 /*
968 * Goes something like this..
969 * - Call vflush() to clear out vnodes for this file system
970 * - Close the socket
971 * - Free up the data structures
972 */
973 /* In the forced case, cancel any outstanding requests. */
974 if (flags & FORCECLOSE) {
975 error = nfs_nmcancelreqs(nmp);
976 if (error)
977 return (error);
978 }
979 /*
980 * Must handshake with nqnfs_clientd() if it is active.
981 */
982 nmp->nm_state |= NFSSTA_DISMINPROG;
983 while (nmp->nm_inprog != NULLVP)
377d4740 984 (void) tsleep((caddr_t)&lbolt, 0, "nfsdism", 0);
984263bc
MD
985
986 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */
987 error = vflush(mp, 1, flags);
988 if (error) {
989 nmp->nm_state &= ~NFSSTA_DISMINPROG;
990 return (error);
991 }
992
993 /*
994 * We are now committed to the unmount.
995 * For NQNFS, let the server daemon free the nfsmount structure.
996 */
997 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB))
998 nmp->nm_state |= NFSSTA_DISMNT;
999
1000 nfs_disconnect(nmp);
1001 FREE(nmp->nm_nam, M_SONAME);
1002
1003 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0)
3b568787 1004 nfs_free_mount(nmp);
984263bc
MD
1005 return (0);
1006}
1007
3b568787
MD
1008void
1009nfs_free_mount(struct nfsmount *nmp)
1010{
1011 if (nmp->nm_cred) {
1012 crfree(nmp->nm_cred);
1013 nmp->nm_cred = NULL;
1014 }
1015 zfree(nfsmount_zone, nmp);
1016}
1017
984263bc
MD
1018/*
1019 * Return root of a filesystem
1020 */
1021static int
1022nfs_root(mp, vpp)
1023 struct mount *mp;
1024 struct vnode **vpp;
1025{
40393ded 1026 struct vnode *vp;
984263bc
MD
1027 struct nfsmount *nmp;
1028 struct nfsnode *np;
1029 int error;
1030
1031 nmp = VFSTONFS(mp);
1032 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
1033 if (error)
1034 return (error);
1035 vp = NFSTOV(np);
1036 if (vp->v_type == VNON)
1037 vp->v_type = VDIR;
1038 vp->v_flag = VROOT;
1039 *vpp = vp;
1040 return (0);
1041}
1042
1043extern int syncprt;
1044
1045/*
1046 * Flush out the buffer cache
1047 */
1048/* ARGSUSED */
1049static int
3b568787 1050nfs_sync(struct mount *mp, int waitfor, struct thread *td)
984263bc 1051{
dadab5e9 1052 struct vnode *vp;
984263bc
MD
1053 int error, allerror = 0;
1054
1055 /*
1056 * Force stale buffer cache information to be flushed.
1057 */
1058loop:
1059 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist);
1060 vp != NULL;
1061 vp = TAILQ_NEXT(vp, v_nmntvnodes)) {
1062 /*
1063 * If the vnode that we are about to sync is no longer
1064 * associated with this mount point, start over.
1065 */
1066 if (vp->v_mount != mp)
1067 goto loop;
1068 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
1069 waitfor == MNT_LAZY)
1070 continue;
dadab5e9 1071 if (vget(vp, LK_EXCLUSIVE, td))
984263bc 1072 goto loop;
3b568787 1073 error = VOP_FSYNC(vp, waitfor, td);
984263bc
MD
1074 if (error)
1075 allerror = error;
1076 vput(vp);
1077 }
1078 return (allerror);
1079}
1080