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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * from nfs_vfsops.c 8.12 (Berkeley) 5/20/95
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 #include "opt_bootp.h"
40 #include "opt_nfsroot.h"
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
47 #include <sys/clock.h>
50 #include <sys/malloc.h>
52 #include <sys/module.h>
53 #include <sys/mount.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/sockio.h>
58 #include <sys/sysctl.h>
59 #include <sys/vnode.h>
60 #include <sys/signalvar.h>
63 #include <vm/vm_extern.h>
67 #include <net/route.h>
68 #include <netinet/in.h>
70 #include <fs/nfs/nfsport.h>
71 #include <fs/nfsclient/nfsnode.h>
72 #include <fs/nfsclient/nfsmount.h>
73 #include <fs/nfsclient/nfs.h>
74 #include <fs/nfsclient/nfsdiskless.h>
76 extern int nfscl_ticks;
77 extern struct timeval nfsboottime;
78 extern struct nfsstats newnfsstats;
80 MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "New NFS request header");
81 MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "New NFS mount struct");
83 SYSCTL_DECL(_vfs_newnfs);
84 SYSCTL_STRUCT(_vfs_newnfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RW,
85 &newnfsstats, nfsstats, "S,nfsstats");
86 static int nfs_ip_paranoia = 1;
87 SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
88 &nfs_ip_paranoia, 0, "");
89 static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY;
90 SYSCTL_INT(_vfs_newnfs, NFS_TPRINTF_INITIAL_DELAY,
91 downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, "");
92 /* how long between console messages "nfs server foo not responding" */
93 static int nfs_tprintf_delay = NFS_TPRINTF_DELAY;
94 SYSCTL_INT(_vfs_newnfs, NFS_TPRINTF_DELAY,
95 downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, "");
97 static void nfs_sec_name(char *, int *);
98 static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp,
99 struct nfs_args *argp, struct ucred *, struct thread *);
100 static int mountnfs(struct nfs_args *, struct mount *,
101 struct sockaddr *, char *, u_char *, u_char *, u_char *,
102 struct vnode **, struct ucred *, struct thread *, int);
103 static vfs_mount_t nfs_mount;
104 static vfs_cmount_t nfs_cmount;
105 static vfs_unmount_t nfs_unmount;
106 static vfs_root_t nfs_root;
107 static vfs_statfs_t nfs_statfs;
108 static vfs_sync_t nfs_sync;
109 static vfs_sysctl_t nfs_sysctl;
112 * nfs vfs operations.
114 static struct vfsops nfs_vfsops = {
115 .vfs_init = ncl_init,
116 .vfs_mount = nfs_mount,
117 .vfs_cmount = nfs_cmount,
118 .vfs_root = nfs_root,
119 .vfs_statfs = nfs_statfs,
120 .vfs_sync = nfs_sync,
121 .vfs_uninit = ncl_uninit,
122 .vfs_unmount = nfs_unmount,
123 .vfs_sysctl = nfs_sysctl,
125 VFS_SET(nfs_vfsops, newnfs, VFCF_NETWORK);
127 /* So that loader and kldload(2) can find us, wherever we are.. */
128 MODULE_VERSION(newnfs, 1);
131 * This structure must be filled in by a primary bootstrap or bootstrap
132 * server for a diskless/dataless machine. It is initialized below just
133 * to ensure that it is allocated to initialized data (.data not .bss).
135 struct nfs_diskless newnfs_diskless = { { { 0 } } };
136 struct nfsv3_diskless newnfsv3_diskless = { { { 0 } } };
137 int newnfs_diskless_valid = 0;
139 SYSCTL_INT(_vfs_newnfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
140 &newnfs_diskless_valid, 0,
141 "Has the diskless struct been filled correctly");
143 SYSCTL_STRING(_vfs_newnfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
144 newnfsv3_diskless.root_hostnam, 0, "Path to nfs root");
146 SYSCTL_OPAQUE(_vfs_newnfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
147 &newnfsv3_diskless.root_saddr, sizeof newnfsv3_diskless.root_saddr,
148 "%Ssockaddr_in", "Diskless root nfs address");
151 void newnfsargs_ntoh(struct nfs_args *);
152 static int nfs_mountdiskless(char *,
153 struct sockaddr_in *, struct nfs_args *,
154 struct thread *, struct vnode **, struct mount *);
155 static void nfs_convert_diskless(void);
156 static void nfs_convert_oargs(struct nfs_args *args,
157 struct onfs_args *oargs);
160 newnfs_iosize(struct nfsmount *nmp)
164 /* First, set the upper limit for iosize */
165 if (nmp->nm_flag & NFSMNT_NFSV4) {
166 maxio = NFS_MAXBSIZE;
167 } else if (nmp->nm_flag & NFSMNT_NFSV3) {
168 if (nmp->nm_sotype == SOCK_DGRAM)
169 maxio = NFS_MAXDGRAMDATA;
171 maxio = NFS_MAXBSIZE;
173 maxio = NFS_V2MAXDATA;
175 if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0)
176 nmp->nm_rsize = maxio;
177 if (nmp->nm_rsize > MAXBSIZE)
178 nmp->nm_rsize = MAXBSIZE;
179 if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0)
180 nmp->nm_readdirsize = maxio;
181 if (nmp->nm_readdirsize > nmp->nm_rsize)
182 nmp->nm_readdirsize = nmp->nm_rsize;
183 if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0)
184 nmp->nm_wsize = maxio;
185 if (nmp->nm_wsize > MAXBSIZE)
186 nmp->nm_wsize = MAXBSIZE;
189 * Calculate the size used for io buffers. Use the larger
190 * of the two sizes to minimise nfs requests but make sure
191 * that it is at least one VM page to avoid wasting buffer
194 iosize = imax(nmp->nm_rsize, nmp->nm_wsize);
195 iosize = imax(iosize, PAGE_SIZE);
196 nmp->nm_mountp->mnt_stat.f_iosize = iosize;
201 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs)
204 args->version = NFS_ARGSVERSION;
205 args->addr = oargs->addr;
206 args->addrlen = oargs->addrlen;
207 args->sotype = oargs->sotype;
208 args->proto = oargs->proto;
209 args->fh = oargs->fh;
210 args->fhsize = oargs->fhsize;
211 args->flags = oargs->flags;
212 args->wsize = oargs->wsize;
213 args->rsize = oargs->rsize;
214 args->readdirsize = oargs->readdirsize;
215 args->timeo = oargs->timeo;
216 args->retrans = oargs->retrans;
217 args->readahead = oargs->readahead;
218 args->hostname = oargs->hostname;
222 nfs_convert_diskless(void)
225 bcopy(&newnfs_diskless.myif, &newnfsv3_diskless.myif,
226 sizeof (struct ifaliasreq));
227 bcopy(&newnfs_diskless.mygateway, &newnfsv3_diskless.mygateway,
228 sizeof (struct sockaddr_in));
229 nfs_convert_oargs(&newnfsv3_diskless.root_args,
230 &newnfs_diskless.root_args);
231 if (newnfsv3_diskless.root_args.flags & NFSMNT_NFSV3) {
232 newnfsv3_diskless.root_fhsize = NFSX_MYFH;
233 bcopy(newnfs_diskless.root_fh, newnfsv3_diskless.root_fh,
236 newnfsv3_diskless.root_fhsize = NFSX_V2FH;
237 bcopy(newnfs_diskless.root_fh, newnfsv3_diskless.root_fh,
240 bcopy(&newnfs_diskless.root_saddr,&newnfsv3_diskless.root_saddr,
241 sizeof(struct sockaddr_in));
242 bcopy(newnfs_diskless.root_hostnam, newnfsv3_diskless.root_hostnam,
244 newnfsv3_diskless.root_time = newnfs_diskless.root_time;
245 bcopy(newnfs_diskless.my_hostnam, newnfsv3_diskless.my_hostnam,
247 newnfs_diskless_valid = 3;
254 nfs_statfs(struct mount *mp, struct statfs *sbp)
258 struct nfsmount *nmp = VFSTONFS(mp);
259 struct nfsvattr nfsva;
262 int error = 0, attrflag, gotfsinfo = 0, ret;
267 error = vfs_busy(mp, MBF_NOWAIT);
270 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np);
276 mtx_lock(&nmp->nm_mtx);
277 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) {
278 mtx_unlock(&nmp->nm_mtx);
279 error = nfsrpc_fsinfo(vp, &fs, td->td_ucred, td, &nfsva,
284 mtx_unlock(&nmp->nm_mtx);
286 error = nfsrpc_statfs(vp, &sb, &fs, td->td_ucred, td, &nfsva,
289 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1,
290 td->td_ucred, td, &nfsva, NULL);
293 * Just set default values to get things going.
295 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr));
296 nfsva.na_vattr.va_type = VDIR;
297 nfsva.na_vattr.va_mode = 0777;
298 nfsva.na_vattr.va_nlink = 100;
299 nfsva.na_vattr.va_uid = (uid_t)0;
300 nfsva.na_vattr.va_gid = (gid_t)0;
301 nfsva.na_vattr.va_fileid = 2;
302 nfsva.na_vattr.va_gen = 1;
303 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE;
304 nfsva.na_vattr.va_size = 512 * 1024;
307 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
309 mtx_lock(&nmp->nm_mtx);
310 if (gotfsinfo || (nmp->nm_flag & NFSMNT_NFSV4))
311 nfscl_loadfsinfo(nmp, &fs);
312 nfscl_loadsbinfo(nmp, &sb, sbp);
313 sbp->f_flags = nmp->nm_flag;
314 sbp->f_iosize = newnfs_iosize(nmp);
315 mtx_unlock(&nmp->nm_mtx);
316 if (sbp != &mp->mnt_stat) {
317 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
318 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
320 strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN);
321 } else if (NFS_ISV4(vp)) {
322 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
330 * nfs version 3 fsinfo rpc call
333 ncl_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred,
337 struct nfsvattr nfsva;
340 error = nfsrpc_fsinfo(vp, &fs, cred, td, &nfsva, &attrflag, NULL);
343 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
345 mtx_lock(&nmp->nm_mtx);
346 nfscl_loadfsinfo(nmp, &fs);
347 mtx_unlock(&nmp->nm_mtx);
353 * Mount a remote root fs via. nfs. This depends on the info in the
354 * newnfs_diskless structure that has been filled in properly by some primary
356 * It goes something like this:
357 * - do enough of "ifconfig" by calling ifioctl() so that the system
358 * can talk to the server
359 * - If newnfs_diskless.mygateway is filled in, use that address as
361 * - build the rootfs mount point and call mountnfs() to do the rest.
363 * It is assumed to be safe to read, modify, and write the nfsv3_diskless
364 * structure, as well as other global NFS client variables here, as
365 * nfs_mountroot() will be called once in the boot before any other NFS
366 * client activity occurs.
369 ncl_mountroot(struct mount *mp)
371 struct thread *td = curthread;
372 struct nfsv3_diskless *nd = &newnfsv3_diskless;
381 #if defined(BOOTP_NFSROOT) && defined(BOOTP)
382 bootpc_init(); /* use bootp to get nfs_diskless filled in */
383 #elif defined(NFS_ROOT)
384 nfs_setup_diskless();
387 if (newnfs_diskless_valid == 0)
389 if (newnfs_diskless_valid == 1)
390 nfs_convert_diskless();
393 * XXX splnet, so networks will receive...
398 * Do enough of ifconfig(8) so that the critical net interface can
399 * talk to the server.
401 error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0,
404 panic("nfs_mountroot: socreate(%04x): %d",
405 nd->myif.ifra_addr.sa_family, error);
407 #if 0 /* XXX Bad idea */
409 * We might not have been told the right interface, so we pass
410 * over the first ten interfaces of the same kind, until we get
411 * one of them configured.
414 for (i = strlen(nd->myif.ifra_name) - 1;
415 nd->myif.ifra_name[i] >= '0' &&
416 nd->myif.ifra_name[i] <= '9';
417 nd->myif.ifra_name[i] ++) {
418 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
423 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
425 panic("nfs_mountroot: SIOCAIFADDR: %d", error);
426 if ((cp = getenv("boot.netif.mtu")) != NULL) {
427 ir.ifr_mtu = strtol(cp, NULL, 10);
428 bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ);
430 error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td);
432 printf("nfs_mountroot: SIOCSIFMTU: %d", error);
437 * If the gateway field is filled in, set it as the default route.
438 * Note that pxeboot will set a default route of 0 if the route
439 * is not set by the DHCP server. Check also for a value of 0
440 * to avoid panicking inappropriately in that situation.
442 if (nd->mygateway.sin_len != 0 &&
443 nd->mygateway.sin_addr.s_addr != 0) {
444 struct sockaddr_in mask, sin;
446 bzero((caddr_t)&mask, sizeof(mask));
448 sin.sin_family = AF_INET;
449 sin.sin_len = sizeof(sin);
450 /* XXX MRT use table 0 for this sort of thing */
451 error = rtrequest(RTM_ADD, (struct sockaddr *)&sin,
452 (struct sockaddr *)&nd->mygateway,
453 (struct sockaddr *)&mask,
454 RTF_UP | RTF_GATEWAY, NULL);
456 panic("nfs_mountroot: RTM_ADD: %d", error);
460 * Create the rootfs mount point.
462 nd->root_args.fh = nd->root_fh;
463 nd->root_args.fhsize = nd->root_fhsize;
464 l = ntohl(nd->root_saddr.sin_addr.s_addr);
465 snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
466 (l >> 24) & 0xff, (l >> 16) & 0xff,
467 (l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam);
468 printf("NFS ROOT: %s\n", buf);
469 nd->root_args.hostname = buf;
470 if ((error = nfs_mountdiskless(buf,
471 &nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) {
476 * This is not really an nfs issue, but it is much easier to
477 * set hostname here and then let the "/etc/rc.xxx" files
478 * mount the right /var based upon its preset value.
480 mtx_lock(&prison0.pr_mtx);
481 strlcpy(prison0.pr_hostname, nd->my_hostnam,
482 sizeof(prison0.pr_hostname));
483 mtx_unlock(&prison0.pr_mtx);
484 inittodr(ntohl(nd->root_time));
489 * Internal version of mount system call for diskless setup.
492 nfs_mountdiskless(char *path,
493 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
494 struct vnode **vpp, struct mount *mp)
496 struct sockaddr *nam;
499 nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK);
500 if ((error = mountnfs(args, mp, nam, path, NULL, NULL, NULL, vpp,
501 td->td_ucred, td, NFS_DEFAULT_NEGNAMETIMEO)) != 0) {
502 printf("nfs_mountroot: mount %s on /: %d\n", path, error);
509 nfs_sec_name(char *sec, int *flagsp)
511 if (!strcmp(sec, "krb5"))
512 *flagsp |= NFSMNT_KERB;
513 else if (!strcmp(sec, "krb5i"))
514 *flagsp |= (NFSMNT_KERB | NFSMNT_INTEGRITY);
515 else if (!strcmp(sec, "krb5p"))
516 *flagsp |= (NFSMNT_KERB | NFSMNT_PRIVACY);
520 nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp,
521 struct ucred *cred, struct thread *td)
529 * Set read-only flag if requested; otherwise, clear it if this is
530 * an update. If this is not an update, then either the read-only
531 * flag is already clear, or this is a root mount and it was set
532 * intentionally at some previous point.
534 if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) {
536 mp->mnt_flag |= MNT_RDONLY;
538 } else if (mp->mnt_flag & MNT_UPDATE) {
540 mp->mnt_flag &= ~MNT_RDONLY;
545 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
546 * no sense in that context. Also, set up appropriate retransmit
547 * and soft timeout behavior.
549 if (argp->sotype == SOCK_STREAM) {
550 nmp->nm_flag &= ~NFSMNT_NOCONN;
551 nmp->nm_timeo = NFS_MAXTIMEO;
554 /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */
555 if ((argp->flags & NFSMNT_NFSV3) == 0)
556 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
558 /* Also re-bind if we're switching to/from a connected UDP socket */
559 adjsock = ((nmp->nm_flag & NFSMNT_NOCONN) !=
560 (argp->flags & NFSMNT_NOCONN));
562 /* Update flags atomically. Don't change the lock bits. */
563 nmp->nm_flag = argp->flags | nmp->nm_flag;
566 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
567 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
568 if (nmp->nm_timeo < NFS_MINTIMEO)
569 nmp->nm_timeo = NFS_MINTIMEO;
570 else if (nmp->nm_timeo > NFS_MAXTIMEO)
571 nmp->nm_timeo = NFS_MAXTIMEO;
574 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
575 nmp->nm_retry = argp->retrans;
576 if (nmp->nm_retry > NFS_MAXREXMIT)
577 nmp->nm_retry = NFS_MAXREXMIT;
580 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
581 nmp->nm_wsize = argp->wsize;
582 /* Round down to multiple of blocksize */
583 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
584 if (nmp->nm_wsize <= 0)
585 nmp->nm_wsize = NFS_FABLKSIZE;
588 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
589 nmp->nm_rsize = argp->rsize;
590 /* Round down to multiple of blocksize */
591 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
592 if (nmp->nm_rsize <= 0)
593 nmp->nm_rsize = NFS_FABLKSIZE;
596 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
597 nmp->nm_readdirsize = argp->readdirsize;
600 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
601 nmp->nm_acregmin = argp->acregmin;
603 nmp->nm_acregmin = NFS_MINATTRTIMO;
604 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
605 nmp->nm_acregmax = argp->acregmax;
607 nmp->nm_acregmax = NFS_MAXATTRTIMO;
608 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
609 nmp->nm_acdirmin = argp->acdirmin;
611 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
612 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
613 nmp->nm_acdirmax = argp->acdirmax;
615 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
616 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
617 nmp->nm_acdirmin = nmp->nm_acdirmax;
618 if (nmp->nm_acregmin > nmp->nm_acregmax)
619 nmp->nm_acregmin = nmp->nm_acregmax;
621 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
622 if (argp->readahead <= NFS_MAXRAHEAD)
623 nmp->nm_readahead = argp->readahead;
625 nmp->nm_readahead = NFS_MAXRAHEAD;
627 if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) {
628 if (argp->wcommitsize < nmp->nm_wsize)
629 nmp->nm_wcommitsize = nmp->nm_wsize;
631 nmp->nm_wcommitsize = argp->wcommitsize;
634 adjsock |= ((nmp->nm_sotype != argp->sotype) ||
635 (nmp->nm_soproto != argp->proto));
637 if (nmp->nm_client != NULL && adjsock) {
638 int haslock = 0, error = 0;
640 if (nmp->nm_sotype == SOCK_STREAM) {
641 error = newnfs_sndlock(&nmp->nm_sockreq.nr_lock);
646 newnfs_disconnect(&nmp->nm_sockreq);
648 newnfs_sndunlock(&nmp->nm_sockreq.nr_lock);
649 nmp->nm_sotype = argp->sotype;
650 nmp->nm_soproto = argp->proto;
651 if (nmp->nm_sotype == SOCK_DGRAM)
652 while (newnfs_connect(nmp, &nmp->nm_sockreq,
654 printf("newnfs_args: retrying connect\n");
655 (void) nfs_catnap(PSOCK, 0, "newnfscon");
659 nmp->nm_sotype = argp->sotype;
660 nmp->nm_soproto = argp->proto;
664 static const char *nfs_opts[] = { "from",
665 "noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union",
666 "noclusterr", "noclusterw", "multilabel", "acls", "force", "update",
667 "async", "noconn", "nolockd", "conn", "lockd", "intr", "rdirplus",
668 "readdirsize", "soft", "hard", "mntudp", "tcp", "udp", "wsize", "rsize",
669 "retrans", "acregmin", "acregmax", "acdirmin", "acdirmax", "resvport",
670 "readahead", "hostname", "timeout", "addr", "fh", "nfsv3", "sec",
671 "principal", "nfsv4", "gssname", "allgssname", "dirpath",
679 * It seems a bit dumb to copyinstr() the host and path here and then
680 * bcopy() them in mountnfs(), but I wanted to detect errors before
681 * doing the sockargs() call because sockargs() allocates an mbuf and
682 * an error after that means that I have to release the mbuf.
686 nfs_mount(struct mount *mp)
688 struct nfs_args args = {
689 .version = NFS_ARGSVERSION,
691 .addrlen = sizeof (struct sockaddr_in),
692 .sotype = SOCK_STREAM,
699 .readdirsize = NFS_READDIRSIZE,
701 .retrans = NFS_RETRANS,
702 .readahead = NFS_DEFRAHEAD,
703 .wcommitsize = 0, /* was: NQ_DEFLEASE */
706 .acregmin = NFS_MINATTRTIMO,
707 .acregmax = NFS_MAXATTRTIMO,
708 .acdirmin = NFS_MINDIRATTRTIMO,
709 .acdirmax = NFS_MAXDIRATTRTIMO,
714 int error = 0, ret, len;
715 struct sockaddr *nam = NULL;
719 u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100];
720 char *opt, *name, *secname;
721 int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO;
723 if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) {
729 if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS) {
730 error = ncl_mountroot(mp);
736 /* Handle the new style options. */
737 if (vfs_getopt(mp->mnt_optnew, "noconn", NULL, NULL) == 0)
738 args.flags |= NFSMNT_NOCONN;
739 if (vfs_getopt(mp->mnt_optnew, "conn", NULL, NULL) == 0)
740 args.flags |= NFSMNT_NOCONN;
741 if (vfs_getopt(mp->mnt_optnew, "nolockd", NULL, NULL) == 0)
742 args.flags |= NFSMNT_NOLOCKD;
743 if (vfs_getopt(mp->mnt_optnew, "lockd", NULL, NULL) == 0)
744 args.flags &= ~NFSMNT_NOLOCKD;
745 if (vfs_getopt(mp->mnt_optnew, "intr", NULL, NULL) == 0)
746 args.flags |= NFSMNT_INT;
747 if (vfs_getopt(mp->mnt_optnew, "rdirplus", NULL, NULL) == 0)
748 args.flags |= NFSMNT_RDIRPLUS;
749 if (vfs_getopt(mp->mnt_optnew, "resvport", NULL, NULL) == 0)
750 args.flags |= NFSMNT_RESVPORT;
751 if (vfs_getopt(mp->mnt_optnew, "noresvport", NULL, NULL) == 0)
752 args.flags &= ~NFSMNT_RESVPORT;
753 if (vfs_getopt(mp->mnt_optnew, "soft", NULL, NULL) == 0)
754 args.flags |= NFSMNT_SOFT;
755 if (vfs_getopt(mp->mnt_optnew, "hard", NULL, NULL) == 0)
756 args.flags &= ~NFSMNT_SOFT;
757 if (vfs_getopt(mp->mnt_optnew, "mntudp", NULL, NULL) == 0)
758 args.sotype = SOCK_DGRAM;
759 if (vfs_getopt(mp->mnt_optnew, "udp", NULL, NULL) == 0)
760 args.sotype = SOCK_DGRAM;
761 if (vfs_getopt(mp->mnt_optnew, "tcp", NULL, NULL) == 0)
762 args.sotype = SOCK_STREAM;
763 if (vfs_getopt(mp->mnt_optnew, "nfsv3", NULL, NULL) == 0)
764 args.flags |= NFSMNT_NFSV3;
765 if (vfs_getopt(mp->mnt_optnew, "nfsv4", NULL, NULL) == 0) {
766 args.flags |= NFSMNT_NFSV4;
767 args.sotype = SOCK_STREAM;
769 if (vfs_getopt(mp->mnt_optnew, "allgssname", NULL, NULL) == 0)
770 args.flags |= NFSMNT_ALLGSSNAME;
771 if (vfs_getopt(mp->mnt_optnew, "readdirsize", (void **)&opt, NULL) == 0) {
773 vfs_mount_error(mp, "illegal readdirsize");
777 ret = sscanf(opt, "%d", &args.readdirsize);
778 if (ret != 1 || args.readdirsize <= 0) {
779 vfs_mount_error(mp, "illegal readdirsize: %s",
784 args.flags |= NFSMNT_READDIRSIZE;
786 if (vfs_getopt(mp->mnt_optnew, "readahead", (void **)&opt, NULL) == 0) {
788 vfs_mount_error(mp, "illegal readahead");
792 ret = sscanf(opt, "%d", &args.readahead);
793 if (ret != 1 || args.readahead <= 0) {
794 vfs_mount_error(mp, "illegal readahead: %s",
799 args.flags |= NFSMNT_READAHEAD;
801 if (vfs_getopt(mp->mnt_optnew, "wsize", (void **)&opt, NULL) == 0) {
803 vfs_mount_error(mp, "illegal wsize");
807 ret = sscanf(opt, "%d", &args.wsize);
808 if (ret != 1 || args.wsize <= 0) {
809 vfs_mount_error(mp, "illegal wsize: %s",
814 args.flags |= NFSMNT_WSIZE;
816 if (vfs_getopt(mp->mnt_optnew, "rsize", (void **)&opt, NULL) == 0) {
818 vfs_mount_error(mp, "illegal rsize");
822 ret = sscanf(opt, "%d", &args.rsize);
823 if (ret != 1 || args.rsize <= 0) {
824 vfs_mount_error(mp, "illegal wsize: %s",
829 args.flags |= NFSMNT_RSIZE;
831 if (vfs_getopt(mp->mnt_optnew, "retrans", (void **)&opt, NULL) == 0) {
833 vfs_mount_error(mp, "illegal retrans");
837 ret = sscanf(opt, "%d", &args.retrans);
838 if (ret != 1 || args.retrans <= 0) {
839 vfs_mount_error(mp, "illegal retrans: %s",
844 args.flags |= NFSMNT_RETRANS;
846 if (vfs_getopt(mp->mnt_optnew, "acregmin", (void **)&opt, NULL) == 0) {
847 ret = sscanf(opt, "%d", &args.acregmin);
848 if (ret != 1 || args.acregmin < 0) {
849 vfs_mount_error(mp, "illegal acregmin: %s",
854 args.flags |= NFSMNT_ACREGMIN;
856 if (vfs_getopt(mp->mnt_optnew, "acregmax", (void **)&opt, NULL) == 0) {
857 ret = sscanf(opt, "%d", &args.acregmax);
858 if (ret != 1 || args.acregmax < 0) {
859 vfs_mount_error(mp, "illegal acregmax: %s",
864 args.flags |= NFSMNT_ACREGMAX;
866 if (vfs_getopt(mp->mnt_optnew, "acdirmin", (void **)&opt, NULL) == 0) {
867 ret = sscanf(opt, "%d", &args.acdirmin);
868 if (ret != 1 || args.acdirmin < 0) {
869 vfs_mount_error(mp, "illegal acdirmin: %s",
874 args.flags |= NFSMNT_ACDIRMIN;
876 if (vfs_getopt(mp->mnt_optnew, "acdirmax", (void **)&opt, NULL) == 0) {
877 ret = sscanf(opt, "%d", &args.acdirmax);
878 if (ret != 1 || args.acdirmax < 0) {
879 vfs_mount_error(mp, "illegal acdirmax: %s",
884 args.flags |= NFSMNT_ACDIRMAX;
886 if (vfs_getopt(mp->mnt_optnew, "timeout", (void **)&opt, NULL) == 0) {
887 ret = sscanf(opt, "%d", &args.timeo);
888 if (ret != 1 || args.timeo <= 0) {
889 vfs_mount_error(mp, "illegal timeout: %s",
894 args.flags |= NFSMNT_TIMEO;
896 if (vfs_getopt(mp->mnt_optnew, "negnametimeo", (void **)&opt, NULL)
898 ret = sscanf(opt, "%d", &negnametimeo);
899 if (ret != 1 || negnametimeo < 0) {
900 vfs_mount_error(mp, "illegal negnametimeo: %s",
906 if (vfs_getopt(mp->mnt_optnew, "sec",
907 (void **) &secname, NULL) == 0)
908 nfs_sec_name(secname, &args.flags);
910 if (mp->mnt_flag & MNT_UPDATE) {
911 struct nfsmount *nmp = VFSTONFS(mp);
918 * When doing an update, we can't change version,
919 * security, switch lockd strategies or change cookie
922 args.flags = (args.flags &
928 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) |
935 NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/));
936 nfs_decode_args(mp, nmp, &args, td->td_ucred, td);
941 * Make the nfs_ip_paranoia sysctl serve as the default connection
942 * or no-connection mode for those protocols that support
943 * no-connection mode (the flag will be cleared later for protocols
944 * that do not support no-connection mode). This will allow a client
945 * to receive replies from a different IP then the request was
946 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
949 if (nfs_ip_paranoia == 0)
950 args.flags |= NFSMNT_NOCONN;
952 if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh,
953 &args.fhsize) == 0) {
954 if (args.fhsize < 0 || args.fhsize > NFSX_FHMAX) {
955 vfs_mount_error(mp, "Bad file handle");
959 bcopy(args.fh, nfh, args.fhsize);
964 (void) vfs_getopt(mp->mnt_optnew, "hostname", (void **)&args.hostname,
966 if (args.hostname == NULL) {
967 vfs_mount_error(mp, "Invalid hostname");
971 bcopy(args.hostname, hst, MNAMELEN);
972 hst[MNAMELEN - 1] = '\0';
974 if (vfs_getopt(mp->mnt_optnew, "principal", (void **)&name, NULL) == 0)
975 strlcpy(srvkrbname, name, sizeof (srvkrbname));
977 snprintf(srvkrbname, sizeof (srvkrbname), "nfs@%s", hst);
978 args.srvkrbnamelen = strlen(srvkrbname);
980 if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0)
981 strlcpy(krbname, name, sizeof (krbname));
984 args.krbnamelen = strlen(krbname);
986 if (vfs_getopt(mp->mnt_optnew, "dirpath", (void **)&name, NULL) == 0)
987 strlcpy(dirpath, name, sizeof (dirpath));
990 args.dirlen = strlen(dirpath);
992 if (vfs_getopt(mp->mnt_optnew, "addr", (void **)&args.addr,
993 &args.addrlen) == 0) {
994 if (args.addrlen > SOCK_MAXADDRLEN) {
995 error = ENAMETOOLONG;
998 nam = malloc(args.addrlen, M_SONAME, M_WAITOK);
999 bcopy(args.addr, nam, args.addrlen);
1000 nam->sa_len = args.addrlen;
1004 error = mountnfs(&args, mp, nam, hst, krbname, dirpath, srvkrbname,
1005 &vp, td->td_ucred, td, negnametimeo);
1009 mp->mnt_kern_flag |= (MNTK_MPSAFE|MNTK_LOOKUP_SHARED);
1020 * It seems a bit dumb to copyinstr() the host and path here and then
1021 * bcopy() them in mountnfs(), but I wanted to detect errors before
1022 * doing the sockargs() call because sockargs() allocates an mbuf and
1023 * an error after that means that I have to release the mbuf.
1027 nfs_cmount(struct mntarg *ma, void *data, int flags)
1030 struct nfs_args args;
1032 error = copyin(data, &args, sizeof (struct nfs_args));
1036 ma = mount_arg(ma, "nfs_args", &args, sizeof args);
1038 error = kernel_mount(ma, flags);
1043 * Common code for mount and mountroot
1046 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
1047 char *hst, u_char *krbname, u_char *dirpath, u_char *srvkrbname,
1048 struct vnode **vpp, struct ucred *cred, struct thread *td,
1051 struct nfsmount *nmp;
1053 int error, trycnt, ret;
1054 struct nfsvattr nfsva;
1055 static u_int64_t clval = 0;
1057 if (mp->mnt_flag & MNT_UPDATE) {
1059 printf("%s: MNT_UPDATE is no longer handled here\n", __func__);
1060 FREE(nam, M_SONAME);
1063 MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount) +
1064 argp->krbnamelen + argp->dirlen + argp->srvkrbnamelen + 2,
1065 M_NEWNFSMNT, M_WAITOK);
1066 bzero((caddr_t)nmp, sizeof (struct nfsmount) +
1067 argp->krbnamelen + argp->dirlen + argp->srvkrbnamelen + 2);
1068 TAILQ_INIT(&nmp->nm_bufq);
1070 clval = (u_int64_t)nfsboottime.tv_sec;
1071 nmp->nm_clval = clval++;
1072 nmp->nm_krbnamelen = argp->krbnamelen;
1073 nmp->nm_dirpathlen = argp->dirlen;
1074 nmp->nm_srvkrbnamelen = argp->srvkrbnamelen;
1075 if (td->td_ucred->cr_uid != (uid_t)0) {
1077 * nm_uid is used to get KerberosV credentials for
1078 * the nfsv4 state handling operations if there is
1079 * no host based principal set. Use the uid of
1080 * this user if not root, since they are doing the
1081 * mount. I don't think setting this for root will
1082 * work, since root normally does not have user
1083 * credentials in a credentials cache.
1085 nmp->nm_uid = td->td_ucred->cr_uid;
1088 * Just set to -1, so it won't be used.
1090 nmp->nm_uid = (uid_t)-1;
1093 /* Copy and null terminate all the names */
1094 if (nmp->nm_krbnamelen > 0) {
1095 bcopy(krbname, nmp->nm_krbname, nmp->nm_krbnamelen);
1096 nmp->nm_name[nmp->nm_krbnamelen] = '\0';
1098 if (nmp->nm_dirpathlen > 0) {
1099 bcopy(dirpath, NFSMNT_DIRPATH(nmp),
1100 nmp->nm_dirpathlen);
1101 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen
1104 if (nmp->nm_srvkrbnamelen > 0) {
1105 bcopy(srvkrbname, NFSMNT_SRVKRBNAME(nmp),
1106 nmp->nm_srvkrbnamelen);
1107 nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen
1108 + nmp->nm_srvkrbnamelen + 2] = '\0';
1110 nmp->nm_sockreq.nr_cred = crhold(cred);
1111 mtx_init(&nmp->nm_sockreq.nr_mtx, "nfssock", NULL, MTX_DEF);
1115 nmp->nm_mountp = mp;
1116 mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK);
1117 nmp->nm_negnametimeo = negnametimeo;
1119 nfs_decode_args(mp, nmp, argp, cred, td);
1122 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
1123 * high, depending on whether we end up with negative offsets in
1124 * the client or server somewhere. 2GB-1 may be safer.
1126 * For V3, ncl_fsinfo will adjust this as necessary. Assume maximum
1127 * that we can handle until we find out otherwise.
1128 * XXX Our "safe" limit on the client is what we can store in our
1129 * buffer cache using signed(!) block numbers.
1131 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0)
1132 nmp->nm_maxfilesize = 0xffffffffLL;
1134 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
1136 nmp->nm_timeo = NFS_TIMEO;
1137 nmp->nm_retry = NFS_RETRANS;
1138 if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) {
1139 nmp->nm_wsize = NFS_WSIZE;
1140 nmp->nm_rsize = NFS_RSIZE;
1141 nmp->nm_readdirsize = NFS_READDIRSIZE;
1143 nmp->nm_wcommitsize = hibufspace / (desiredvnodes / 1000);
1144 nmp->nm_numgrps = NFS_MAXGRPS;
1145 nmp->nm_readahead = NFS_DEFRAHEAD;
1146 nmp->nm_tprintf_delay = nfs_tprintf_delay;
1147 if (nmp->nm_tprintf_delay < 0)
1148 nmp->nm_tprintf_delay = 0;
1149 nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay;
1150 if (nmp->nm_tprintf_initial_delay < 0)
1151 nmp->nm_tprintf_initial_delay = 0;
1152 nmp->nm_fhsize = argp->fhsize;
1153 if (nmp->nm_fhsize > 0)
1154 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
1155 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
1157 /* Set up the sockets and per-host congestion */
1158 nmp->nm_sotype = argp->sotype;
1159 nmp->nm_soproto = argp->proto;
1160 nmp->nm_sockreq.nr_prog = NFS_PROG;
1161 if ((argp->flags & NFSMNT_NFSV4))
1162 nmp->nm_sockreq.nr_vers = NFS_VER4;
1163 else if ((argp->flags & NFSMNT_NFSV3))
1164 nmp->nm_sockreq.nr_vers = NFS_VER3;
1166 nmp->nm_sockreq.nr_vers = NFS_VER2;
1169 if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0)))
1173 * A reference count is needed on the nfsnode representing the
1174 * remote root. If this object is not persistent, then backward
1175 * traversals of the mount point (i.e. "..") will not work if
1176 * the nfsnode gets flushed out of the cache. Ufs does not have
1177 * this problem, because one can identify root inodes by their
1178 * number == ROOTINO (2).
1180 if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) &&
1181 nmp->nm_dirpathlen > 0) {
1183 * If the fhsize on the mount point == 0 for V4, the mount
1184 * path needs to be looked up.
1188 error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp),
1191 (void) nfs_catnap(PZERO, error, "nfsgetdirp");
1192 } while (error && --trycnt > 0);
1194 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1198 if (nmp->nm_fhsize > 0) {
1200 * Set f_iosize to NFS_DIRBLKSIZ so that bo_bsize gets set
1201 * non-zero for the root vnode. f_iosize will be set correctly
1202 * by nfs_statfs() before any I/O occurs.
1204 mp->mnt_stat.f_iosize = NFS_DIRBLKSIZ;
1205 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np);
1211 * Get file attributes and transfer parameters for the
1212 * mountpoint. This has the side effect of filling in
1213 * (*vpp)->v_type with the correct value.
1215 ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1,
1216 cred, td, &nfsva, NULL);
1219 * Just set default values to get things going.
1221 NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr));
1222 nfsva.na_vattr.va_type = VDIR;
1223 nfsva.na_vattr.va_mode = 0777;
1224 nfsva.na_vattr.va_nlink = 100;
1225 nfsva.na_vattr.va_uid = (uid_t)0;
1226 nfsva.na_vattr.va_gid = (gid_t)0;
1227 nfsva.na_vattr.va_fileid = 2;
1228 nfsva.na_vattr.va_gen = 1;
1229 nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE;
1230 nfsva.na_vattr.va_size = 512 * 1024;
1232 (void) nfscl_loadattrcache(vpp, &nfsva, NULL, NULL, 0, 1);
1233 if (argp->flags & NFSMNT_NFSV3)
1234 ncl_fsinfo(nmp, *vpp, cred, td);
1237 * Lose the lock but keep the ref.
1239 VOP_UNLOCK(*vpp, 0);
1245 newnfs_disconnect(&nmp->nm_sockreq);
1246 crfree(nmp->nm_sockreq.nr_cred);
1247 mtx_destroy(&nmp->nm_sockreq.nr_mtx);
1248 mtx_destroy(&nmp->nm_mtx);
1249 FREE(nmp, M_NEWNFSMNT);
1250 FREE(nam, M_SONAME);
1255 * unmount system call
1258 nfs_unmount(struct mount *mp, int mntflags)
1261 struct nfsmount *nmp;
1262 int error, flags = 0, trycnt = 0;
1266 if (mntflags & MNT_FORCE)
1267 flags |= FORCECLOSE;
1270 * Goes something like this..
1271 * - Call vflush() to clear out vnodes for this filesystem
1272 * - Close the socket
1273 * - Free up the data structures
1275 /* In the forced case, cancel any outstanding requests. */
1276 if (mntflags & MNT_FORCE) {
1277 error = newnfs_nmcancelreqs(nmp);
1280 /* For a forced close, get rid of the renew thread now */
1281 nfscl_umount(nmp, td);
1283 /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */
1285 error = vflush(mp, 1, flags, td);
1286 if ((mntflags & MNT_FORCE) && error != 0 && ++trycnt < 30)
1287 (void) nfs_catnap(PSOCK, error, "newndm");
1288 } while ((mntflags & MNT_FORCE) && error != 0 && trycnt < 30);
1293 * We are now committed to the unmount.
1295 if ((mntflags & MNT_FORCE) == 0)
1296 nfscl_umount(nmp, td);
1297 newnfs_disconnect(&nmp->nm_sockreq);
1298 crfree(nmp->nm_sockreq.nr_cred);
1299 FREE(nmp->nm_nam, M_SONAME);
1301 mtx_destroy(&nmp->nm_sockreq.nr_mtx);
1302 mtx_destroy(&nmp->nm_mtx);
1303 FREE(nmp, M_NEWNFSMNT);
1309 * Return root of a filesystem
1312 nfs_root(struct mount *mp, int flags, struct vnode **vpp)
1315 struct nfsmount *nmp;
1320 error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np);
1325 * Get transfer parameters and attributes for root vnode once.
1327 mtx_lock(&nmp->nm_mtx);
1328 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) {
1329 mtx_unlock(&nmp->nm_mtx);
1330 ncl_fsinfo(nmp, vp, curthread->td_ucred, curthread);
1332 mtx_unlock(&nmp->nm_mtx);
1333 if (vp->v_type == VNON)
1335 vp->v_vflag |= VV_ROOT;
1341 * Flush out the buffer cache
1345 nfs_sync(struct mount *mp, int waitfor)
1347 struct vnode *vp, *mvp;
1349 int error, allerror = 0;
1354 * Force stale buffer cache information to be flushed.
1358 MNT_VNODE_FOREACH(vp, mp, mvp) {
1361 /* XXX Racy bv_cnt check. */
1362 if (VOP_ISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
1363 waitfor == MNT_LAZY) {
1368 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
1370 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
1373 error = VOP_FSYNC(vp, waitfor, td);
1386 nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req)
1388 struct nfsmount *nmp = VFSTONFS(mp);
1392 bzero(&vq, sizeof(vq));
1395 case VFS_CTL_NOLOCKS:
1396 val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0;
1397 if (req->oldptr != NULL) {
1398 error = SYSCTL_OUT(req, &val, sizeof(val));
1402 if (req->newptr != NULL) {
1403 error = SYSCTL_IN(req, &val, sizeof(val));
1407 nmp->nm_flag |= NFSMNT_NOLOCKS;
1409 nmp->nm_flag &= ~NFSMNT_NOLOCKS;
1414 mtx_lock(&nmp->nm_mtx);
1415 if (nmp->nm_state & NFSSTA_TIMEO)
1416 vq.vq_flags |= VQ_NOTRESP;
1417 mtx_unlock(&nmp->nm_mtx);
1419 if (!(nmp->nm_flag & NFSMNT_NOLOCKS) &&
1420 (nmp->nm_state & NFSSTA_LOCKTIMEO))
1421 vq.vq_flags |= VQ_NOTRESPLOCK;
1423 error = SYSCTL_OUT(req, &vq, sizeof(vq));
1426 if (req->oldptr != NULL) {
1427 error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay,
1428 sizeof(nmp->nm_tprintf_initial_delay));
1432 if (req->newptr != NULL) {
1433 error = vfs_suser(mp, req->td);
1436 error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay,
1437 sizeof(nmp->nm_tprintf_initial_delay));
1440 if (nmp->nm_tprintf_initial_delay < 0)
1441 nmp->nm_tprintf_initial_delay = 0;