2 * Copyright (c) 1989, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
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 $
38 * $DragonFly: src/sys/vfs/nfs/nfs_vfsops.c,v 1.11 2004/01/30 06:18:28 dillon Exp $
41 #include "opt_bootp.h"
43 #include <sys/param.h>
44 #include <sys/sockio.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>
52 #include <sys/socket.h>
53 #include <sys/socketvar.h>
54 #include <sys/systm.h>
57 #include <vm/vm_extern.h>
58 #include <vm/vm_zone.h>
61 #include <net/route.h>
62 #include <netinet/in.h>
70 #include "nfsm_subs.h"
71 #include "nfsdiskless.h"
74 extern int nfs_mountroot (struct mount *mp);
78 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header");
79 MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle");
80 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure");
81 MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data");
82 MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor");
83 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure");
84 MALLOC_DEFINE(M_NQLEASE, "NQNFS Lease", "Nqnfs lease");
85 MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables");
87 vm_zone_t nfsmount_zone;
89 struct nfsstats nfsstats;
90 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
91 SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
92 &nfsstats, nfsstats, "");
93 static int nfs_ip_paranoia = 1;
94 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
95 &nfs_ip_paranoia, 0, "");
98 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, "");
101 static int nfs_iosize (struct nfsmount *nmp);
102 static void nfs_decode_args (struct nfsmount *nmp,
103 struct nfs_args *argp);
104 static int mountnfs (struct nfs_args *,struct mount *,
105 struct sockaddr *,char *,char *,struct vnode **);
106 static int nfs_mount ( struct mount *mp, char *path, caddr_t data,
107 struct nameidata *ndp, struct thread *td);
108 static int nfs_unmount ( struct mount *mp, int mntflags,
110 static int nfs_root ( struct mount *mp, struct vnode **vpp);
111 static int nfs_statfs ( struct mount *mp, struct statfs *sbp,
113 static int nfs_sync ( struct mount *mp, int waitfor,
117 * nfs vfs operations.
119 static struct vfsops nfs_vfsops = {
128 vfs_stdfhtovp, /* shouldn't happen */
130 vfs_stdvptofh, /* shouldn't happen */
135 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK);
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).
142 struct nfs_diskless nfs_diskless = { { { 0 } } };
143 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
144 int nfs_diskless_valid = 0;
146 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
147 &nfs_diskless_valid, 0, "");
149 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
150 nfsv3_diskless.root_hostnam, 0, "");
152 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
153 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr,
154 "%Ssockaddr_in", "");
156 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD,
157 nfsv3_diskless.swap_hostnam, 0, "");
159 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD,
160 &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr,
164 void nfsargs_ntoh (struct nfs_args *);
165 static int nfs_mountdiskless (char *, char *, int,
166 struct sockaddr_in *, struct nfs_args *,
167 struct thread *, struct vnode **,
169 static void nfs_convert_diskless (void);
170 static void nfs_convert_oargs (struct nfs_args *args,
171 struct onfs_args *oargs);
175 struct nfsmount* nmp;
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
185 iosize = max(nmp->nm_rsize, nmp->nm_wsize);
186 if (iosize < PAGE_SIZE) iosize = PAGE_SIZE;
191 nfs_convert_oargs(args, oargs)
192 struct nfs_args *args;
193 struct onfs_args *oargs;
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;
216 nfs_convert_diskless()
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,
240 nfs_diskless_valid = 3;
247 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
250 struct nfs_statfs *sfp;
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;
263 sfp = (struct nfs_statfs *)0;
265 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
270 cred->cr_ngroups = 1;
271 if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
272 (void)nfs_fsinfo(nmp, vp, td);
273 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
274 nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3));
276 nfsm_request(vp, NFSPROC_FSSTAT, td, cred);
278 nfsm_postop_attr(vp, retattr);
284 nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3));
285 sbp->f_flags = nmp->nm_flag;
286 sbp->f_iosize = nfs_iosize(nmp);
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);
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);
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);
320 * nfs version 3 fsinfo rpc call
323 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td)
325 struct nfsv3_fsinfo *fsp;
328 u_int32_t *tl, pref, max;
329 caddr_t bpos, dpos, cp2;
330 int error = 0, retattr;
331 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
334 nfsstats.rpccnt[NFSPROC_FSINFO]++;
335 nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1));
337 nfsm_request(vp, NFSPROC_FSINFO, td, nfs_vpcred(vp, ND_READ));
338 nfsm_postop_attr(vp, retattr);
340 nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO);
341 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
342 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
343 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
344 ~(NFS_FABLKSIZE - 1);
345 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
346 if (max < nmp->nm_wsize && max > 0) {
347 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
348 if (nmp->nm_wsize == 0)
351 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
352 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
353 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
354 ~(NFS_FABLKSIZE - 1);
355 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
356 if (max < nmp->nm_rsize && max > 0) {
357 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
358 if (nmp->nm_rsize == 0)
361 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
362 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ)
363 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
364 ~(NFS_DIRBLKSIZ - 1);
365 if (max < nmp->nm_readdirsize && max > 0) {
366 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
367 if (nmp->nm_readdirsize == 0)
368 nmp->nm_readdirsize = max;
370 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
371 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
372 nmp->nm_maxfilesize = maxfsize;
373 nmp->nm_state |= NFSSTA_GOTFSINFO;
381 * Mount a remote root fs via. nfs. This depends on the info in the
382 * nfs_diskless structure that has been filled in properly by some primary
384 * It goes something like this:
385 * - do enough of "ifconfig" by calling ifioctl() so that the system
386 * can talk to the server
387 * - If nfs_diskless.mygateway is filled in, use that address as
389 * - build the rootfs mount point and call mountnfs() to do the rest.
395 struct mount *swap_mp;
396 struct nfsv3_diskless *nd = &nfsv3_diskless;
399 struct thread *td = curthread; /* XXX */
404 #if defined(BOOTP_NFSROOT) && defined(BOOTP)
405 bootpc_init(); /* use bootp to get nfs_diskless filled in */
409 * XXX time must be non-zero when we init the interface or else
410 * the arp code will wedge...
412 while (mycpu->gd_time_seconds == 0)
413 tsleep(mycpu, 0, "arpkludge", 10);
415 if (nfs_diskless_valid==1)
416 nfs_convert_diskless();
419 * XXX splnet, so networks will receive...
424 /* Set up swap credentials. */
425 proc0.p_ucred->cr_uid = ntohl(nd->swap_ucred.cr_uid);
426 proc0.p_ucred->cr_gid = ntohl(nd->swap_ucred.cr_gid);
427 if ((proc0.p_ucred->cr_ngroups = ntohs(nd->swap_ucred.cr_ngroups)) >
429 proc0.p_ucred->cr_ngroups = NGROUPS;
430 for (i = 0; i < proc0.p_ucred->cr_ngroups; i++)
431 proc0.p_ucred->cr_groups[i] = ntohl(nd->swap_ucred.cr_groups[i]);
435 * Do enough of ifconfig(8) so that the critical net interface can
436 * talk to the server.
438 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td);
440 panic("nfs_mountroot: socreate(%04x): %d",
441 nd->myif.ifra_addr.sa_family, error);
443 #if 0 /* XXX Bad idea */
445 * We might not have been told the right interface, so we pass
446 * over the first ten interfaces of the same kind, until we get
447 * one of them configured.
450 for (i = strlen(nd->myif.ifra_name) - 1;
451 nd->myif.ifra_name[i] >= '0' &&
452 nd->myif.ifra_name[i] <= '9';
453 nd->myif.ifra_name[i] ++) {
454 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
459 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
461 panic("nfs_mountroot: SIOCAIFADDR: %d", error);
465 * If the gateway field is filled in, set it as the default route.
467 if (nd->mygateway.sin_len != 0) {
468 struct sockaddr_in mask, sin;
470 bzero((caddr_t)&mask, sizeof(mask));
472 sin.sin_family = AF_INET;
473 sin.sin_len = sizeof(sin);
474 error = rtrequest(RTM_ADD, (struct sockaddr *)&sin,
475 (struct sockaddr *)&nd->mygateway,
476 (struct sockaddr *)&mask,
477 RTF_UP | RTF_GATEWAY, (struct rtentry **)0);
479 panic("nfs_mountroot: RTM_ADD: %d", error);
483 * Create the rootfs mount point.
485 nd->root_args.fh = nd->root_fh;
486 nd->root_args.fhsize = nd->root_fhsize;
487 l = ntohl(nd->root_saddr.sin_addr.s_addr);
488 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
489 (l >> 24) & 0xff, (l >> 16) & 0xff,
490 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
491 printf("NFS ROOT: %s\n",buf);
492 if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY,
493 &nd->root_saddr, &nd->root_args, td, &vp, &mp)) != 0) {
495 mp->mnt_vfc->vfc_refcount--;
496 free(swap_mp, M_MOUNT);
502 if (nd->swap_nblks) {
504 /* Convert to DEV_BSIZE instead of Kilobyte */
508 * Create a fake mount point just for the swap vnode so that the
509 * swap file can be on a different server from the rootfs.
511 nd->swap_args.fh = nd->swap_fh;
512 nd->swap_args.fhsize = nd->swap_fhsize;
513 l = ntohl(nd->swap_saddr.sin_addr.s_addr);
514 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
515 (l >> 24) & 0xff, (l >> 16) & 0xff,
516 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
517 printf("NFS SWAP: %s\n",buf);
518 if ((error = nfs_mountdiskless(buf, "/swap", 0,
519 &nd->swap_saddr, &nd->swap_args, td, &vp, &swap_mp)) != 0)
521 vfs_unbusy(swap_mp, td);
523 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
524 nd->swap_nblks * DEV_BSIZE ;
527 * Since the swap file is not the root dir of a file system,
528 * hack it to a regular file.
533 swaponvp(td, vp, NODEV, nd->swap_nblks);
536 mp->mnt_flag |= MNT_ROOTFS;
537 mp->mnt_vnodecovered = NULLVP;
542 * This is not really an nfs issue, but it is much easier to
543 * set hostname here and then let the "/etc/rc.xxx" files
544 * mount the right /var based upon its preset value.
546 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN);
547 hostname[MAXHOSTNAMELEN - 1] = '\0';
548 for (i = 0; i < MAXHOSTNAMELEN; i++)
549 if (hostname[i] == '\0')
551 inittodr(ntohl(nd->root_time));
556 * Internal version of mount system call for diskless setup.
559 nfs_mountdiskless(char *path, char *which, int mountflag,
560 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
561 struct vnode **vpp, struct mount **mpp)
564 struct sockaddr *nam;
571 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) {
572 printf("nfs_mountroot: NFS not configured");
578 mp->mnt_kern_flag = 0;
579 mp->mnt_flag = mountflag;
580 nam = dup_sockaddr((struct sockaddr *)sin, 1);
581 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) {
582 printf("nfs_mountroot: mount %s on %s: %d", path, which, error);
583 mp->mnt_vfc->vfc_refcount--;
590 (void) copystr(which, mp->mnt_stat.f_mntonname, MNAMELEN - 1, 0);
596 nfs_decode_args(nmp, argp)
597 struct nfsmount *nmp;
598 struct nfs_args *argp;
606 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
607 * no sense in that context.
609 if (argp->sotype == SOCK_STREAM)
610 nmp->nm_flag &= ~NFSMNT_NOCONN;
612 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */
613 if ((argp->flags & NFSMNT_NFSV3) == 0)
614 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
616 /* Re-bind if rsrvd port requested and wasn't on one */
617 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
618 && (argp->flags & NFSMNT_RESVPORT);
619 /* Also re-bind if we're switching to/from a connected UDP socket */
620 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
621 (argp->flags & NFSMNT_NOCONN));
623 /* Update flags atomically. Don't change the lock bits. */
624 nmp->nm_flag = argp->flags | nmp->nm_flag;
627 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
628 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
629 if (nmp->nm_timeo < NFS_MINTIMEO)
630 nmp->nm_timeo = NFS_MINTIMEO;
631 else if (nmp->nm_timeo > NFS_MAXTIMEO)
632 nmp->nm_timeo = NFS_MAXTIMEO;
635 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
636 nmp->nm_retry = argp->retrans;
637 if (nmp->nm_retry > NFS_MAXREXMIT)
638 nmp->nm_retry = NFS_MAXREXMIT;
641 if (argp->flags & NFSMNT_NFSV3) {
642 if (argp->sotype == SOCK_DGRAM)
643 maxio = NFS_MAXDGRAMDATA;
647 maxio = NFS_V2MAXDATA;
649 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
650 nmp->nm_wsize = argp->wsize;
651 /* Round down to multiple of blocksize */
652 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
653 if (nmp->nm_wsize <= 0)
654 nmp->nm_wsize = NFS_FABLKSIZE;
656 if (nmp->nm_wsize > maxio)
657 nmp->nm_wsize = maxio;
658 if (nmp->nm_wsize > MAXBSIZE)
659 nmp->nm_wsize = MAXBSIZE;
661 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
662 nmp->nm_rsize = argp->rsize;
663 /* Round down to multiple of blocksize */
664 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
665 if (nmp->nm_rsize <= 0)
666 nmp->nm_rsize = NFS_FABLKSIZE;
668 if (nmp->nm_rsize > maxio)
669 nmp->nm_rsize = maxio;
670 if (nmp->nm_rsize > MAXBSIZE)
671 nmp->nm_rsize = MAXBSIZE;
673 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
674 nmp->nm_readdirsize = argp->readdirsize;
676 if (nmp->nm_readdirsize > maxio)
677 nmp->nm_readdirsize = maxio;
678 if (nmp->nm_readdirsize > nmp->nm_rsize)
679 nmp->nm_readdirsize = nmp->nm_rsize;
681 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
682 nmp->nm_acregmin = argp->acregmin;
684 nmp->nm_acregmin = NFS_MINATTRTIMO;
685 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
686 nmp->nm_acregmax = argp->acregmax;
688 nmp->nm_acregmax = NFS_MAXATTRTIMO;
689 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
690 nmp->nm_acdirmin = argp->acdirmin;
692 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
693 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
694 nmp->nm_acdirmax = argp->acdirmax;
696 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
697 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
698 nmp->nm_acdirmin = nmp->nm_acdirmax;
699 if (nmp->nm_acregmin > nmp->nm_acregmax)
700 nmp->nm_acregmin = nmp->nm_acregmax;
702 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
703 if (argp->maxgrouplist <= NFS_MAXGRPS)
704 nmp->nm_numgrps = argp->maxgrouplist;
706 nmp->nm_numgrps = NFS_MAXGRPS;
708 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
709 if (argp->readahead <= NFS_MAXRAHEAD)
710 nmp->nm_readahead = argp->readahead;
712 nmp->nm_readahead = NFS_MAXRAHEAD;
714 if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2) {
715 if (argp->leaseterm <= NQ_MAXLEASE)
716 nmp->nm_leaseterm = argp->leaseterm;
718 nmp->nm_leaseterm = NQ_MAXLEASE;
720 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) {
721 if (argp->deadthresh <= NQ_NEVERDEAD)
722 nmp->nm_deadthresh = argp->deadthresh;
724 nmp->nm_deadthresh = NQ_NEVERDEAD;
727 adjsock |= ((nmp->nm_sotype != argp->sotype) ||
728 (nmp->nm_soproto != argp->proto));
729 nmp->nm_sotype = argp->sotype;
730 nmp->nm_soproto = argp->proto;
732 if (nmp->nm_so && adjsock) {
733 nfs_safedisconnect(nmp);
734 if (nmp->nm_sotype == SOCK_DGRAM)
735 while (nfs_connect(nmp, (struct nfsreq *)0)) {
736 printf("nfs_args: retrying connect\n");
737 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0);
746 * It seems a bit dumb to copyinstr() the host and path here and then
747 * bcopy() them in mountnfs(), but I wanted to detect errors before
748 * doing the sockargs() call because sockargs() allocates an mbuf and
749 * an error after that means that I have to release the mbuf.
753 nfs_mount(struct mount *mp, char *path, caddr_t data,
754 struct nameidata *ndp, struct thread *td)
757 struct nfs_args args;
758 struct sockaddr *nam;
760 char pth[MNAMELEN], hst[MNAMELEN];
762 u_char nfh[NFSX_V3FHMAX];
768 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
771 if (args.version != NFS_ARGSVERSION) {
772 #ifdef COMPAT_PRELITE2
774 * If the argument version is unknown, then assume the
775 * caller is a pre-lite2 4.4BSD client and convert its
778 struct onfs_args oargs;
779 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args));
782 nfs_convert_oargs(&args,&oargs);
783 #else /* !COMPAT_PRELITE2 */
784 return (EPROGMISMATCH);
785 #endif /* COMPAT_PRELITE2 */
787 if (mp->mnt_flag & MNT_UPDATE) {
788 struct nfsmount *nmp = VFSTONFS(mp);
793 * When doing an update, we can't change from or to
794 * v3 and/or nqnfs, or change cookie translation
796 args.flags = (args.flags &
797 ~(NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/)) |
799 (NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/));
800 nfs_decode_args(nmp, &args);
805 * Make the nfs_ip_paranoia sysctl serve as the default connection
806 * or no-connection mode for those protocols that support
807 * no-connection mode (the flag will be cleared later for protocols
808 * that do not support no-connection mode). This will allow a client
809 * to receive replies from a different IP then the request was
810 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
813 if (nfs_ip_paranoia == 0)
814 args.flags |= NFSMNT_NOCONN;
815 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
817 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
820 error = copyinstr(path, pth, MNAMELEN-1, &len);
823 bzero(&pth[len], MNAMELEN - len);
824 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
827 bzero(&hst[len], MNAMELEN - len);
828 /* sockargs() call must be after above copyin() calls */
829 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
833 error = mountnfs(&args, mp, nam, pth, hst, &vp);
838 * Common code for mount and mountroot
841 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
842 char *pth, char *hst, struct vnode **vpp)
844 struct nfsmount *nmp;
849 if (mp->mnt_flag & MNT_UPDATE) {
851 /* update paths, file handles, etc, here XXX */
855 nmp = zalloc(nfsmount_zone);
856 bzero((caddr_t)nmp, sizeof (struct nfsmount));
857 TAILQ_INIT(&nmp->nm_uidlruhead);
858 TAILQ_INIT(&nmp->nm_bufq);
859 mp->mnt_data = (qaddr_t)nmp;
863 if (argp->flags & NFSMNT_NQNFS)
865 * We have to set mnt_maxsymlink to a non-zero value so
866 * that COMPAT_43 routines will know that we are setting
867 * the d_type field in directories (and can zero it for
868 * unsuspecting binaries).
870 mp->mnt_maxsymlinklen = 1;
873 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
874 * high, depending on whether we end up with negative offsets in
875 * the client or server somewhere. 2GB-1 may be safer.
877 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
878 * that we can handle until we find out otherwise.
879 * XXX Our "safe" limit on the client is what we can store in our
880 * buffer cache using signed(!) block numbers.
882 if ((argp->flags & NFSMNT_NFSV3) == 0)
883 nmp->nm_maxfilesize = 0xffffffffLL;
885 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
887 nmp->nm_timeo = NFS_TIMEO;
888 nmp->nm_retry = NFS_RETRANS;
889 nmp->nm_wsize = NFS_WSIZE;
890 nmp->nm_rsize = NFS_RSIZE;
891 nmp->nm_readdirsize = NFS_READDIRSIZE;
892 nmp->nm_numgrps = NFS_MAXGRPS;
893 nmp->nm_readahead = NFS_DEFRAHEAD;
894 nmp->nm_leaseterm = NQ_DEFLEASE;
895 nmp->nm_deadthresh = NQ_DEADTHRESH;
896 CIRCLEQ_INIT(&nmp->nm_timerhead);
897 nmp->nm_inprog = NULLVP;
898 nmp->nm_fhsize = argp->fhsize;
899 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
900 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
901 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN);
903 /* Set up the sockets and per-host congestion */
904 nmp->nm_sotype = argp->sotype;
905 nmp->nm_soproto = argp->proto;
906 nmp->nm_cred = crhold(proc0.p_ucred);
908 nfs_decode_args(nmp, argp);
911 * For Connection based sockets (TCP,...) defer the connect until
912 * the first request, in case the server is not responding.
914 if (nmp->nm_sotype == SOCK_DGRAM &&
915 (error = nfs_connect(nmp, (struct nfsreq *)0)))
919 * This is silly, but it has to be set so that vinifod() works.
920 * We do not want to do an nfs_statfs() here since we can get
921 * stuck on a dead server and we are holding a lock on the mount
924 mp->mnt_stat.f_iosize = nfs_iosize(nmp);
926 * A reference count is needed on the nfsnode representing the
927 * remote root. If this object is not persistent, then backward
928 * traversals of the mount point (i.e. "..") will not work if
929 * the nfsnode gets flushed out of the cache. Ufs does not have
930 * this problem, because one can identify root inodes by their
931 * number == ROOTINO (2).
933 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
939 * Get file attributes for the mountpoint. This has the side
940 * effect of filling in (*vpp)->v_type with the correct value.
942 VOP_GETATTR(*vpp, &attrs, curthread);
945 * Lose the lock but keep the ref.
947 VOP_UNLOCK(*vpp, 0, curthread);
958 * unmount system call
961 nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
963 struct nfsmount *nmp;
964 int error, flags = 0;
966 if (mntflags & MNT_FORCE)
970 * Goes something like this..
971 * - Call vflush() to clear out vnodes for this file system
973 * - Free up the data structures
975 /* In the forced case, cancel any outstanding requests. */
976 if (flags & FORCECLOSE) {
977 error = nfs_nmcancelreqs(nmp);
982 * Must handshake with nqnfs_clientd() if it is active.
984 nmp->nm_state |= NFSSTA_DISMINPROG;
985 while (nmp->nm_inprog != NULLVP)
986 (void) tsleep((caddr_t)&lbolt, 0, "nfsdism", 0);
988 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */
989 error = vflush(mp, 1, flags);
991 nmp->nm_state &= ~NFSSTA_DISMINPROG;
996 * We are now committed to the unmount.
997 * For NQNFS, let the server daemon free the nfsmount structure.
999 if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB))
1000 nmp->nm_state |= NFSSTA_DISMNT;
1002 nfs_disconnect(nmp);
1003 FREE(nmp->nm_nam, M_SONAME);
1005 if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0)
1006 nfs_free_mount(nmp);
1011 nfs_free_mount(struct nfsmount *nmp)
1014 crfree(nmp->nm_cred);
1015 nmp->nm_cred = NULL;
1017 zfree(nfsmount_zone, nmp);
1021 * Return root of a filesystem
1029 struct nfsmount *nmp;
1034 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
1038 if (vp->v_type == VNON)
1048 * Flush out the buffer cache
1052 nfs_sync(struct mount *mp, int waitfor, struct thread *td)
1055 int error, allerror = 0;
1058 * Force stale buffer cache information to be flushed.
1061 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist);
1063 vp = TAILQ_NEXT(vp, v_nmntvnodes)) {
1065 * If the vnode that we are about to sync is no longer
1066 * associated with this mount point, start over.
1068 if (vp->v_mount != mp)
1070 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
1071 waitfor == MNT_LAZY)
1073 if (vget(vp, LK_EXCLUSIVE, td))
1075 error = VOP_FSYNC(vp, waitfor, td);