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. 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 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
33 * $FreeBSD: src/sys/nfs/nfs_vfsops.c,v 1.91.2.7 2003/01/27 20:04:08 dillon Exp $
36 #include "opt_bootp.h"
37 #include "opt_nfsroot.h"
39 #include <sys/param.h>
40 #include <sys/sockio.h>
42 #include <sys/vnode.h>
43 #include <sys/fcntl.h>
44 #include <sys/kernel.h>
45 #include <sys/sysctl.h>
46 #include <sys/malloc.h>
47 #include <sys/mount.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/systm.h>
52 #include <sys/objcache.h>
55 #include <vm/vm_extern.h>
58 #include <net/route.h>
59 #include <netinet/in.h>
61 #include <sys/thread2.h>
62 #include <sys/mutex2.h>
70 #include "nfsm_subs.h"
71 #include "nfsdiskless.h"
72 #include "nfsmountrpc.h"
74 extern int nfs_mountroot(struct mount *mp);
75 extern void bootpc_init(void);
77 extern struct vop_ops nfsv2_vnode_vops;
78 extern struct vop_ops nfsv2_fifo_vops;
79 extern struct vop_ops nfsv2_spec_vops;
81 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header");
82 MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle");
83 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure");
84 MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data");
85 MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor");
86 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure");
87 MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables");
89 struct objcache *nfsmount_objcache;
91 struct nfsstats nfsstats;
92 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
93 SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD, &nfsstats, nfsstats,
94 "Nfs stats structure");
95 static int nfs_ip_paranoia = 1;
96 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, &nfs_ip_paranoia, 0,
97 "Enable no-connection mode for protocols that support no-connection mode");
100 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, "");
104 * Tunable to determine the Read/Write unit size. Maximum value
105 * is NFS_MAXDATA. We also default to NFS_MAXDATA.
107 static int nfs_io_size = NFS_MAXDATA;
108 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_io_size, CTLFLAG_RW,
109 &nfs_io_size, 0, "NFS optimal I/O unit size");
111 static void nfs_decode_args (struct nfsmount *nmp,
112 struct nfs_args *argp);
113 static int mountnfs (struct nfs_args *,struct mount *,
114 struct sockaddr *,char *,char *,struct vnode **);
115 static int nfs_mount ( struct mount *mp, char *path, caddr_t data,
117 static int nfs_unmount ( struct mount *mp, int mntflags);
118 static int nfs_root ( struct mount *mp, struct vnode **vpp);
119 static int nfs_statfs ( struct mount *mp, struct statfs *sbp,
121 static int nfs_statvfs(struct mount *mp, struct statvfs *sbp,
123 static int nfs_sync ( struct mount *mp, int waitfor);
126 * nfs vfs operations.
128 static struct vfsops nfs_vfsops = {
129 .vfs_mount = nfs_mount,
130 .vfs_unmount = nfs_unmount,
131 .vfs_root = nfs_root,
132 .vfs_statfs = nfs_statfs,
133 .vfs_statvfs = nfs_statvfs,
134 .vfs_sync = nfs_sync,
135 .vfs_init = nfs_init,
136 .vfs_uninit = nfs_uninit
138 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK);
139 MODULE_VERSION(nfs, 1);
142 * This structure must be filled in by a primary bootstrap or bootstrap
143 * server for a diskless/dataless machine. It is initialized below just
144 * to ensure that it is allocated to initialized data (.data not .bss).
146 struct nfs_diskless nfs_diskless = { { { 0 } } };
147 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
148 int nfs_diskless_valid = 0;
150 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
151 &nfs_diskless_valid, 0,
152 "NFS diskless params were obtained");
154 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
155 nfsv3_diskless.root_hostnam, 0,
156 "Host name for mount point");
158 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
159 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr,
160 "%Ssockaddr_in", "Address of root server");
162 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD,
163 nfsv3_diskless.swap_hostnam, 0,
164 "Host name for mount ppoint");
166 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD,
167 &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr,
168 "%Ssockaddr_in", "Address of swap server");
171 void nfsargs_ntoh (struct nfs_args *);
172 static int nfs_mountdiskless (char *, char *, int,
173 struct sockaddr_in *, struct nfs_args *,
174 struct thread *, struct vnode **,
176 static void nfs_convert_diskless (void);
177 static void nfs_convert_oargs (struct nfs_args *args,
178 struct onfs_args *oargs);
181 * Calculate the buffer I/O block size to use. The maximum V2 block size
182 * is typically 8K, the maximum datagram size is typically 16K, and the
183 * maximum V3 block size is typically 32K. The buffer cache tends to work
184 * best with 16K blocks but we allow 32K for TCP connections.
186 * We force the block size to be at least a page for buffer cache efficiency.
189 nfs_iosize(int v3, int sotype)
195 if (sotype == SOCK_STREAM)
198 iomax = NFS_MAXDGRAMDATA;
200 iomax = NFS_V2MAXDATA;
202 if ((iosize = nfs_io_size) > iomax)
204 if (iosize < PAGE_SIZE)
208 * This is an aweful hack but until the buffer cache is rewritten
209 * we need it. The problem is that when you combine write() with
210 * mmap() the vm_page->valid bits can become weird looking
211 * (e.g. 0xfc). This occurs because NFS uses piecemeal buffers
212 * at the file EOF. To solve the problem the BIO system needs to
213 * be guarenteed that the NFS iosize for regular files will be a
214 * multiple of PAGE_SIZE so it can invalidate the whole page
215 * rather then just the piece of it owned by the buffer when
216 * NFS does vinvalbuf() calls.
218 if (iosize & PAGE_MASK)
219 iosize = (iosize & ~PAGE_MASK) + PAGE_SIZE;
224 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs)
226 args->version = NFS_ARGSVERSION;
227 args->addr = oargs->addr;
228 args->addrlen = oargs->addrlen;
229 args->sotype = oargs->sotype;
230 args->proto = oargs->proto;
231 args->fh = oargs->fh;
232 args->fhsize = oargs->fhsize;
233 args->flags = oargs->flags;
234 args->wsize = oargs->wsize;
235 args->rsize = oargs->rsize;
236 args->readdirsize = oargs->readdirsize;
237 args->timeo = oargs->timeo;
238 args->retrans = oargs->retrans;
239 args->maxgrouplist = oargs->maxgrouplist;
240 args->readahead = oargs->readahead;
241 args->deadthresh = oargs->deadthresh;
242 args->hostname = oargs->hostname;
246 nfs_convert_diskless(void)
250 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif,
251 sizeof(struct ifaliasreq));
252 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway,
253 sizeof(struct sockaddr_in));
254 nfs_convert_oargs(&nfsv3_diskless.swap_args, &nfs_diskless.swap_args);
257 * Copy the NFS handle passed from the diskless code.
259 * XXX CURRENTLY DISABLED - bootp passes us a NFSv2 handle which
260 * will fail utterly with HAMMER due to limitations with NFSv2
263 bcopy(nfs_diskless.swap_fh, nfsv3_diskless.swap_fh, NFSX_V2FH);
264 nfsv3_diskless.swap_fhsize = NFSX_V2FH;
265 for (i = NFSX_V2FH - 1; i >= 0; --i) {
266 if (nfs_diskless.swap_fh[i])
270 nfsv3_diskless.swap_fhsize = 0;
271 nfsv3_diskless.swap_fhsize = 0; /* FORCE DISABLE */
273 bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr,
274 sizeof(struct sockaddr_in));
275 bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN);
276 nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks;
277 bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred,
278 sizeof(struct ucred));
279 nfs_convert_oargs(&nfsv3_diskless.root_args, &nfs_diskless.root_args);
282 * Copy the NFS handle passed from the diskless code.
284 * XXX CURRENTLY DISABLED - bootp passes us a NFSv2 handle which
285 * will fail utterly with HAMMER due to limitations with NFSv2
288 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH);
289 nfsv3_diskless.root_fhsize = NFSX_V2FH;
290 for (i = NFSX_V2FH - 1; i >= 0; --i) {
291 if (nfs_diskless.root_fh[i])
295 nfsv3_diskless.root_fhsize = 0;
296 nfsv3_diskless.root_fhsize = 0; /* FORCE DISABLE */
298 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr,
299 sizeof(struct sockaddr_in));
300 bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN);
301 nfsv3_diskless.root_time = nfs_diskless.root_time;
302 bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam,
304 nfs_diskless_valid = 3;
311 nfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
314 struct nfs_statfs *sfp;
315 struct nfsmount *nmp = VFSTONFS(mp);
316 thread_t td = curthread;
317 int error = 0, retattr;
320 struct nfsm_info info;
323 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
325 lwkt_gettoken(&nmp->nm_token);
330 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, NULL);
332 lwkt_reltoken(&nmp->nm_token);
336 /* ignore the passed cred */
338 cred->cr_ngroups = 1;
339 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
340 (void)nfs_fsinfo(nmp, vp, td);
341 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
342 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
343 ERROROUT(nfsm_fhtom(&info, vp));
344 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
346 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
347 NFS_LATTR_NOSHRINK));
350 if (info.mrep != NULL)
354 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
355 sbp->f_flags = nmp->nm_flag;
358 sbp->f_bsize = NFS_FABLKSIZE;
359 tquad = fxdr_hyper(&sfp->sf_tbytes);
360 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
361 tquad = fxdr_hyper(&sfp->sf_fbytes);
362 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
363 tquad = fxdr_hyper(&sfp->sf_abytes);
364 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
365 sbp->f_files = (fxdr_unsigned(int32_t,
366 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
367 sbp->f_ffree = (fxdr_unsigned(int32_t,
368 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
370 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
371 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
372 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
373 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
379 * Some values are pre-set in mnt_stat. Note in particular f_iosize
380 * cannot be changed once the filesystem is mounted as it is used
381 * as the basis for BIOs.
383 if (sbp != &mp->mnt_stat) {
384 sbp->f_type = mp->mnt_vfc->vfc_typenum;
385 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
386 sbp->f_iosize = mp->mnt_stat.f_iosize;
393 lwkt_reltoken(&nmp->nm_token);
398 nfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
401 struct nfs_statfs *sfp;
402 struct nfsmount *nmp = VFSTONFS(mp);
403 thread_t td = curthread;
404 int error = 0, retattr;
406 struct nfsm_info info;
409 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
410 lwkt_gettoken(&nmp->nm_token);
415 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, NULL);
417 lwkt_reltoken(&nmp->nm_token);
421 /* ignore the passed cred */
423 cred->cr_ngroups = 1;
424 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
425 (void)nfs_fsinfo(nmp, vp, td);
426 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
427 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
428 ERROROUT(nfsm_fhtom(&info, vp));
429 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
431 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
432 NFS_LATTR_NOSHRINK));
435 if (info.mrep != NULL)
439 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
440 sbp->f_flag = nmp->nm_flag;
441 sbp->f_owner = nmp->nm_cred->cr_ruid;
444 sbp->f_bsize = NFS_FABLKSIZE;
445 sbp->f_frsize = NFS_FABLKSIZE;
446 sbp->f_blocks = (fxdr_hyper(&sfp->sf_tbytes) /
447 ((u_quad_t)NFS_FABLKSIZE));
448 sbp->f_bfree = (fxdr_hyper(&sfp->sf_fbytes) /
449 ((u_quad_t)NFS_FABLKSIZE));
450 sbp->f_bavail = (fxdr_hyper(&sfp->sf_abytes) /
451 ((u_quad_t)NFS_FABLKSIZE));
452 sbp->f_files = fxdr_hyper(&sfp->sf_tfiles);
453 sbp->f_ffree = fxdr_hyper(&sfp->sf_ffiles);
454 sbp->f_favail = fxdr_hyper(&sfp->sf_afiles);
456 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
457 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
458 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
459 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
464 sbp->f_syncreads = 0;
465 sbp->f_syncwrites = 0;
466 sbp->f_asyncreads = 0;
467 sbp->f_asyncwrites = 0;
468 sbp->f_type = mp->mnt_vfc->vfc_typenum;
475 lwkt_reltoken(&nmp->nm_token);
480 * nfs version 3 fsinfo rpc call
483 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td)
485 struct nfsv3_fsinfo *fsp;
487 int error = 0, retattr;
489 struct nfsm_info info;
492 nfsstats.rpccnt[NFSPROC_FSINFO]++;
493 nfsm_reqhead(&info, vp, NFSPROC_FSINFO, NFSX_FH(1));
494 ERROROUT(nfsm_fhtom(&info, vp));
495 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSINFO, td,
496 nfs_vpcred(vp, ND_READ), &error));
497 ERROROUT(nfsm_postop_attr(&info, vp, &retattr, NFS_LATTR_NOSHRINK));
499 NULLOUT(fsp = nfsm_dissect(&info, NFSX_V3FSINFO));
500 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
501 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
502 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
503 ~(NFS_FABLKSIZE - 1);
504 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
505 if (max < nmp->nm_wsize && max > 0) {
506 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
507 if (nmp->nm_wsize == 0)
510 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
511 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
512 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
513 ~(NFS_FABLKSIZE - 1);
514 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
515 if (max < nmp->nm_rsize && max > 0) {
516 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
517 if (nmp->nm_rsize == 0)
520 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
521 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ)
522 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
523 ~(NFS_DIRBLKSIZ - 1);
524 if (max < nmp->nm_readdirsize && max > 0) {
525 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
526 if (nmp->nm_readdirsize == 0)
527 nmp->nm_readdirsize = max;
529 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
530 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
531 nmp->nm_maxfilesize = maxfsize;
532 nmp->nm_state |= NFSSTA_GOTFSINFO;
535 * Use the smaller of rsize/wsize for the biosize.
537 if (nmp->nm_rsize < nmp->nm_wsize)
538 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_rsize;
540 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_wsize;
549 * Mount a remote root fs via. nfs. This depends on the info in the
550 * nfs_diskless structure that has been filled in properly by some primary
552 * It goes something like this:
553 * - do enough of "ifconfig" by calling ifioctl() so that the system
554 * can talk to the server
555 * - If nfs_diskless.mygateway is filled in, use that address as
557 * - build the rootfs mount point and call mountnfs() to do the rest.
560 nfs_mountroot(struct mount *mp)
562 struct mount *swap_mp;
563 struct nfsv3_diskless *nd = &nfsv3_diskless;
566 struct thread *td = curthread; /* XXX */
571 #if defined(BOOTP_NFSROOT) && defined(BOOTP)
572 bootpc_init(); /* use bootp to get nfs_diskless filled in */
576 * XXX time must be non-zero when we init the interface or else
577 * the arp code will wedge...
579 while (mycpu->gd_time_seconds == 0)
580 tsleep(mycpu, 0, "arpkludge", 10);
583 * The boot code may have passed us a diskless structure.
585 kprintf("DISKLESS %d\n", nfs_diskless_valid);
586 if (nfs_diskless_valid == 1)
587 nfs_convert_diskless();
592 nd->root_args.flags |= NFSMNT_NFSV3 | NFSMNT_RDIRPLUS;
593 nd->swap_args.flags |= NFSMNT_NFSV3;
595 #define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr))
596 kprintf("nfs_mountroot: interface %s ip %s",
598 inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr));
600 inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr));
601 kprintf(" mask %s\n",
602 inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr));
606 * XXX splnet, so networks will receive...
611 * BOOTP does not necessarily have to be compiled into the kernel
612 * for an NFS root to work. If we inherited the network
613 * configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured
614 * out our interface for us and all we need to do is ifconfig the
615 * interface. We only do this if the interface has not already been
616 * ifconfig'd by e.g. BOOTP.
618 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td);
620 panic("nfs_mountroot: socreate(%04x): %d",
621 nd->myif.ifra_addr.sa_family, error);
624 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, proc0.p_ucred);
626 panic("nfs_mountroot: SIOCAIFADDR: %d", error);
628 soclose(so, FNONBLOCK);
631 * If the gateway field is filled in, set it as the default route.
633 if (nd->mygateway.sin_len != 0) {
634 struct sockaddr_in mask, sin;
636 bzero((caddr_t)&mask, sizeof(mask));
638 sin.sin_family = AF_INET;
639 sin.sin_len = sizeof(sin);
640 kprintf("nfs_mountroot: gateway %s\n",
641 inet_ntoa(nd->mygateway.sin_addr));
642 error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin,
643 (struct sockaddr *)&nd->mygateway,
644 (struct sockaddr *)&mask,
645 RTF_UP | RTF_GATEWAY);
647 kprintf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error);
651 * Create the rootfs mount point.
653 nd->root_args.fh = nd->root_fh;
654 nd->root_args.fhsize = nd->root_fhsize;
655 l = ntohl(nd->root_saddr.sin_addr.s_addr);
656 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
657 (l >> 24) & 0xff, (l >> 16) & 0xff,
658 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
659 kprintf("NFS_ROOT: %s\n",buf);
660 error = nfs_mountdiskless(buf, "/", MNT_RDONLY, &nd->root_saddr,
661 &nd->root_args, td, &vp, &mp);
663 mp->mnt_vfc->vfc_refcount--;
669 if (nd->swap_nblks) {
671 /* Convert to DEV_BSIZE instead of Kilobyte */
675 * Create a fake mount point just for the swap vnode so that the
676 * swap file can be on a different server from the rootfs.
678 nd->swap_args.fh = nd->swap_fh;
679 nd->swap_args.fhsize = nd->swap_fhsize;
680 l = ntohl(nd->swap_saddr.sin_addr.s_addr);
681 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
682 (l >> 24) & 0xff, (l >> 16) & 0xff,
683 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
684 kprintf("NFS SWAP: %s\n",buf);
685 error = nfs_mountdiskless(buf, "/swap", 0, &nd->swap_saddr,
686 &nd->swap_args, td, &vp, &swap_mp);
693 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
694 nd->swap_nblks * DEV_BSIZE ;
697 * Since the swap file is not the root dir of a file system,
698 * hack it to a regular file.
700 vclrflags(vp, VROOT);
702 nfs_setvtype(vp, VREG);
703 swaponvp(td, vp, nd->swap_nblks);
706 mp->mnt_flag |= MNT_ROOTFS;
709 * This is not really an nfs issue, but it is much easier to
710 * set hostname here and then let the "/etc/rc.xxx" files
711 * mount the right /var based upon its preset value.
713 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN);
714 hostname[MAXHOSTNAMELEN - 1] = '\0';
715 for (i = 0; i < MAXHOSTNAMELEN; i++)
716 if (hostname[i] == '\0')
718 inittodr(ntohl(nd->root_time));
724 * Internal version of mount system call for diskless setup.
727 nfs_mountdiskless(char *path, char *which, int mountflag,
728 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
729 struct vnode **vpp, struct mount **mpp)
732 struct sockaddr *nam;
739 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) {
740 kprintf("nfs_mountroot: NFS not configured");
745 mp->mnt_kern_flag = 0;
746 mp->mnt_flag = mountflag;
747 nam = dup_sockaddr((struct sockaddr *)sin);
749 #if defined(BOOTP) || defined(NFS_ROOT)
750 if (args->fhsize == 0) {
753 kprintf("NFS_ROOT: No FH passed from loader, attempting "
755 while (*xpath && *xpath != ':')
760 error = md_mount(sin, xpath, args->fh, &args->fhsize, args, td);
762 kprintf("failed error %d.\n", error);
765 kprintf("success!\n");
769 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) {
770 #if defined(BOOTP) || defined(NFS_ROOT)
773 kprintf("nfs_mountroot: mount %s on %s: %d", path, which, error);
774 mp->mnt_vfc->vfc_refcount--;
777 kfree(nam, M_SONAME);
785 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
792 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
793 * no sense in that context.
795 if (nmp->nm_sotype == SOCK_STREAM) {
796 nmp->nm_flag &= ~NFSMNT_NOCONN;
797 argp->flags &= ~NFSMNT_NOCONN;
801 * readdirplus is NFSv3 only.
803 if ((argp->flags & NFSMNT_NFSV3) == 0) {
804 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
805 argp->flags &= ~NFSMNT_RDIRPLUS;
809 * Re-bind if rsrvd port flag has changed
811 adjsock = (nmp->nm_flag & NFSMNT_RESVPORT) !=
812 (argp->flags & NFSMNT_RESVPORT);
814 /* Update flags atomically. Don't change the lock bits. */
815 nmp->nm_flag = argp->flags | nmp->nm_flag;
818 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
819 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
820 if (nmp->nm_timeo < NFS_MINTIMEO)
821 nmp->nm_timeo = NFS_MINTIMEO;
822 else if (nmp->nm_timeo > NFS_MAXTIMEO)
823 nmp->nm_timeo = NFS_MAXTIMEO;
826 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
827 nmp->nm_retry = argp->retrans;
828 if (nmp->nm_retry > NFS_MAXREXMIT)
829 nmp->nm_retry = NFS_MAXREXMIT;
833 * These parameters effect the buffer cache and cannot be changed
834 * once we've successfully mounted.
836 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
837 maxio = nfs_iosize(argp->flags & NFSMNT_NFSV3, nmp->nm_sotype);
839 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
840 nmp->nm_wsize = argp->wsize;
841 /* Round down to multiple of blocksize */
842 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
843 if (nmp->nm_wsize <= 0)
844 nmp->nm_wsize = NFS_FABLKSIZE;
846 if (nmp->nm_wsize > maxio)
847 nmp->nm_wsize = maxio;
848 if (nmp->nm_wsize > MAXBSIZE)
849 nmp->nm_wsize = MAXBSIZE;
851 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
852 nmp->nm_rsize = argp->rsize;
853 /* Round down to multiple of blocksize */
854 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
855 if (nmp->nm_rsize <= 0)
856 nmp->nm_rsize = NFS_FABLKSIZE;
858 if (nmp->nm_rsize > maxio)
859 nmp->nm_rsize = maxio;
860 if (nmp->nm_rsize > MAXBSIZE)
861 nmp->nm_rsize = MAXBSIZE;
863 if ((argp->flags & NFSMNT_READDIRSIZE) &&
864 argp->readdirsize > 0) {
865 nmp->nm_readdirsize = argp->readdirsize;
867 if (nmp->nm_readdirsize > maxio)
868 nmp->nm_readdirsize = maxio;
869 if (nmp->nm_readdirsize > nmp->nm_rsize)
870 nmp->nm_readdirsize = nmp->nm_rsize;
873 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
874 nmp->nm_acregmin = argp->acregmin;
876 nmp->nm_acregmin = NFS_MINATTRTIMO;
877 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
878 nmp->nm_acregmax = argp->acregmax;
880 nmp->nm_acregmax = NFS_MAXATTRTIMO;
881 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
882 nmp->nm_acdirmin = argp->acdirmin;
884 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
885 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
886 nmp->nm_acdirmax = argp->acdirmax;
888 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
889 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
890 nmp->nm_acdirmin = nmp->nm_acdirmax;
891 if (nmp->nm_acregmin > nmp->nm_acregmax)
892 nmp->nm_acregmin = nmp->nm_acregmax;
894 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
895 if (argp->maxgrouplist <= NFS_MAXGRPS)
896 nmp->nm_numgrps = argp->maxgrouplist;
898 nmp->nm_numgrps = NFS_MAXGRPS;
900 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
901 if (argp->readahead <= NFS_MAXRAHEAD)
902 nmp->nm_readahead = argp->readahead;
904 nmp->nm_readahead = NFS_MAXRAHEAD;
906 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) {
907 if (argp->deadthresh <= NFS_NEVERDEAD)
908 nmp->nm_deadthresh = argp->deadthresh;
910 nmp->nm_deadthresh = NFS_NEVERDEAD;
913 if (nmp->nm_so && adjsock) {
914 nfs_safedisconnect(nmp);
915 if (nmp->nm_sotype == SOCK_DGRAM)
916 while (nfs_connect(nmp, NULL)) {
917 kprintf("nfs_args: retrying connect\n");
918 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0);
927 * It seems a bit dumb to copyinstr() the host and path here and then
928 * bcopy() them in mountnfs(), but I wanted to detect errors before
929 * doing the sockargs() call because sockargs() allocates an mbuf and
930 * an error after that means that I have to release the mbuf.
934 nfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
937 struct nfs_args args;
938 struct sockaddr *nam;
940 char pth[MNAMELEN], hst[MNAMELEN];
942 u_char nfh[NFSX_V3FHMAX];
948 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
951 if (args.version != NFS_ARGSVERSION) {
952 #ifdef COMPAT_PRELITE2
954 * If the argument version is unknown, then assume the
955 * caller is a pre-lite2 4.4BSD client and convert its
958 struct onfs_args oargs;
959 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args));
962 nfs_convert_oargs(&args,&oargs);
963 #else /* !COMPAT_PRELITE2 */
964 return (EPROGMISMATCH);
965 #endif /* COMPAT_PRELITE2 */
967 if (mp->mnt_flag & MNT_UPDATE) {
968 struct nfsmount *nmp = VFSTONFS(mp);
973 * When doing an update, we can't change from or to
974 * v3, or change cookie translation, or rsize or wsize.
976 args.flags &= ~(NFSMNT_NFSV3 | NFSMNT_RSIZE | NFSMNT_WSIZE);
977 args.flags |= nmp->nm_flag & (NFSMNT_NFSV3);
978 nfs_decode_args(nmp, &args);
983 * Make the nfs_ip_paranoia sysctl serve as the default connection
984 * or no-connection mode for those protocols that support
985 * no-connection mode (the flag will be cleared later for protocols
986 * that do not support no-connection mode). This will allow a client
987 * to receive replies from a different IP then the request was
988 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
991 if (nfs_ip_paranoia == 0)
992 args.flags |= NFSMNT_NOCONN;
993 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
995 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
998 error = copyinstr(path, pth, MNAMELEN-1, &len);
1001 bzero(&pth[len], MNAMELEN - len);
1002 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
1005 bzero(&hst[len], MNAMELEN - len);
1006 /* sockargs() call must be after above copyin() calls */
1007 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
1011 error = mountnfs(&args, mp, nam, pth, hst, &vp);
1016 * Common code for mount and mountroot
1019 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
1020 char *pth, char *hst, struct vnode **vpp)
1022 struct nfsmount *nmp;
1028 if (mp->mnt_flag & MNT_UPDATE) {
1030 /* update paths, file handles, etc, here XXX */
1031 kfree(nam, M_SONAME);
1034 nmp = objcache_get(nfsmount_objcache, M_WAITOK);
1035 bzero((caddr_t)nmp, sizeof (struct nfsmount));
1036 mtx_init(&nmp->nm_rxlock, "nfsrx");
1037 mtx_init(&nmp->nm_txlock, "nfstx");
1038 TAILQ_INIT(&nmp->nm_uidlruhead);
1039 TAILQ_INIT(&nmp->nm_bioq);
1040 TAILQ_INIT(&nmp->nm_reqq);
1041 TAILQ_INIT(&nmp->nm_reqtxq);
1042 TAILQ_INIT(&nmp->nm_reqrxq);
1043 mp->mnt_data = (qaddr_t)nmp;
1044 lwkt_token_init(&nmp->nm_token, "nfs_token");
1047 nmp->nm_mountp = mp;
1048 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE;
1049 mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
1051 lwkt_gettoken(&nmp->nm_token);
1054 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
1055 * high, depending on whether we end up with negative offsets in
1056 * the client or server somewhere. 2GB-1 may be safer.
1058 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
1059 * that we can handle until we find out otherwise. Note that seek
1060 * offsets are signed.
1062 if ((argp->flags & NFSMNT_NFSV3) == 0)
1063 nmp->nm_maxfilesize = 0xffffffffLL;
1065 nmp->nm_maxfilesize = 0x7fffffffffffffffLL;
1067 nmp->nm_timeo = NFS_TIMEO;
1068 nmp->nm_retry = NFS_RETRANS;
1069 nmp->nm_wsize = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype);
1070 nmp->nm_rsize = nmp->nm_wsize;
1071 nmp->nm_readdirsize = NFS_READDIRSIZE;
1072 nmp->nm_numgrps = NFS_MAXGRPS;
1073 nmp->nm_readahead = NFS_DEFRAHEAD;
1074 nmp->nm_deadthresh = NFS_DEADTHRESH;
1075 nmp->nm_fhsize = argp->fhsize;
1076 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
1077 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
1079 /* Set up the sockets and per-host congestion */
1080 nmp->nm_sotype = argp->sotype;
1081 nmp->nm_soproto = argp->proto;
1082 nmp->nm_cred = crhold(proc0.p_ucred);
1084 nfs_decode_args(nmp, argp);
1087 * For Connection based sockets (TCP,...) defer the connect until
1088 * the first request, in case the server is not responding.
1090 if (nmp->nm_sotype == SOCK_DGRAM &&
1091 (error = nfs_connect(nmp, NULL)))
1095 * This is silly, but it has to be set so that vinifod() works.
1096 * We do not want to do an nfs_statfs() here since we can get
1097 * stuck on a dead server and we are holding a lock on the mount
1100 mp->mnt_stat.f_iosize =
1101 nfs_iosize(nmp->nm_flag & NFSMNT_NFSV3, nmp->nm_sotype);
1104 * Install vop_ops for our vnops
1106 vfs_add_vnodeops(mp, &nfsv2_vnode_vops, &mp->mnt_vn_norm_ops);
1107 vfs_add_vnodeops(mp, &nfsv2_spec_vops, &mp->mnt_vn_spec_ops);
1108 vfs_add_vnodeops(mp, &nfsv2_fifo_vops, &mp->mnt_vn_fifo_ops);
1111 * A reference count is needed on the nfsnode representing the
1112 * remote root. If this object is not persistent, then backward
1113 * traversals of the mount point (i.e. "..") will not work if
1114 * the nfsnode gets flushed out of the cache. Ufs does not have
1115 * this problem, because one can identify root inodes by their
1116 * number == ROOTINO (2).
1118 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, NULL);
1124 * Retrieval of mountpoint attributes is delayed until nfs_rot
1125 * or nfs_statfs are first called. This will happen either when
1126 * we first traverse the mount point or if somebody does a df(1).
1128 * NFSSTA_GOTFSINFO is used to flag if we have successfully
1129 * retrieved mountpoint attributes. In the case of NFSv3 we
1130 * also flag static fsinfo.
1133 (*vpp)->v_type = VNON;
1136 * Lose the lock but keep the ref.
1139 lwkt_gettoken(&nfs_token);
1140 TAILQ_INSERT_TAIL(&nfs_mountq, nmp, nm_entry);
1141 lwkt_reltoken(&nfs_token);
1160 * Start the reader and writer threads.
1162 lwkt_create(nfssvc_iod_reader, nmp, &nmp->nm_rxthread,
1163 NULL, 0, rxcpu, "nfsiod_rx");
1164 lwkt_create(nfssvc_iod_writer, nmp, &nmp->nm_txthread,
1165 NULL, 0, txcpu, "nfsiod_tx");
1166 lwkt_reltoken(&nmp->nm_token);
1169 nfs_disconnect(nmp);
1170 lwkt_reltoken(&nmp->nm_token);
1171 nfs_free_mount(nmp);
1176 * unmount system call
1179 nfs_unmount(struct mount *mp, int mntflags)
1181 struct nfsmount *nmp;
1182 int error, flags = 0;
1185 lwkt_gettoken(&nmp->nm_token);
1186 if (mntflags & MNT_FORCE) {
1187 flags |= FORCECLOSE;
1188 nmp->nm_flag |= NFSMNT_FORCE;
1192 * Goes something like this..
1193 * - Call vflush() to clear out vnodes for this file system
1194 * - Close the socket
1195 * - Free up the data structures
1197 /* In the forced case, cancel any outstanding requests. */
1198 if (flags & FORCECLOSE) {
1199 error = nfs_nmcancelreqs(nmp);
1201 kprintf("NFS: %s: Unable to cancel all requests\n",
1202 mp->mnt_stat.f_mntfromname);
1203 /* continue anyway */
1208 * Must handshake with nfs_clientd() if it is active. XXX
1210 nmp->nm_state |= NFSSTA_DISMINPROG;
1213 * We hold 1 extra ref on the root vnode; see comment in mountnfs().
1215 * If this doesn't work and we are doing a forced unmount we continue
1218 error = vflush(mp, 1, flags);
1220 nmp->nm_state &= ~NFSSTA_DISMINPROG;
1221 if ((flags & FORCECLOSE) == 0) {
1222 lwkt_reltoken(&nmp->nm_token);
1228 * We are now committed to the unmount.
1229 * For NQNFS, let the server daemon free the nfsmount structure.
1231 if (nmp->nm_flag & NFSMNT_KERB)
1232 nmp->nm_state |= NFSSTA_DISMNT;
1233 nfssvc_iod_stop1(nmp);
1234 nfs_disconnect(nmp);
1235 nfssvc_iod_stop2(nmp);
1237 lwkt_gettoken(&nfs_token);
1238 TAILQ_REMOVE(&nfs_mountq, nmp, nm_entry);
1239 lwkt_reltoken(&nfs_token);
1241 lwkt_reltoken(&nmp->nm_token);
1243 if ((nmp->nm_flag & NFSMNT_KERB) == 0) {
1244 nfs_free_mount(nmp);
1250 nfs_free_mount(struct nfsmount *nmp)
1253 crfree(nmp->nm_cred);
1254 nmp->nm_cred = NULL;
1257 kfree(nmp->nm_nam, M_SONAME);
1260 objcache_put(nfsmount_objcache, nmp);
1264 * Return root of a filesystem
1267 nfs_root(struct mount *mp, struct vnode **vpp)
1270 struct nfsmount *nmp;
1276 lwkt_gettoken(&nmp->nm_token);
1277 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, NULL);
1279 lwkt_reltoken(&nmp->nm_token);
1285 * Get transfer parameters and root vnode attributes
1287 * NOTE: nfs_fsinfo() is expected to override the default
1290 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
1291 if (nmp->nm_flag & NFSMNT_NFSV3) {
1292 mp->mnt_stat.f_iosize = nfs_iosize(1, nmp->nm_sotype);
1293 error = nfs_fsinfo(nmp, vp, curthread);
1295 if ((error = VOP_GETATTR(vp, &attrs)) == 0)
1296 nmp->nm_state |= NFSSTA_GOTFSINFO;
1301 * The root vnode is usually cached by the namecache so do not
1302 * try to avoid going over the wire even if we have previous
1303 * information cached. A stale NFS mount can loop
1304 * forever resolving the root vnode if we return no-error when
1305 * there is in fact an error.
1307 np->n_attrstamp = 0;
1308 error = VOP_GETATTR(vp, &attrs);
1310 if (vp->v_type == VNON)
1311 nfs_setvtype(vp, VDIR);
1312 vsetflags(vp, VROOT);
1317 lwkt_reltoken(&nmp->nm_token);
1327 static int nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
1330 * Flush out the buffer cache
1334 nfs_sync(struct mount *mp, int waitfor)
1336 struct nfsmount *nmp = VFSTONFS(mp);
1337 struct scaninfo scaninfo;
1340 scaninfo.rescan = 1;
1341 scaninfo.waitfor = waitfor;
1342 scaninfo.allerror = 0;
1345 * Force stale buffer cache information to be flushed.
1347 lwkt_gettoken(&nmp->nm_token);
1349 if ((waitfor & MNT_LAZY) == 0) {
1350 while (error == 0 && scaninfo.rescan) {
1351 scaninfo.rescan = 0;
1352 error = vsyncscan(mp, VMSC_GETVP,
1353 nfs_sync_scan2, &scaninfo);
1356 lwkt_reltoken(&nmp->nm_token);
1361 nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
1363 struct scaninfo *info = data;
1366 if (vp->v_type == VNON || vp->v_type == VBAD)
1368 error = VOP_FSYNC(vp, info->waitfor, 0);
1370 info->allerror = error;