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 1.54 2008/07/31 20:23:40 swildner Exp $
41 #include "opt_bootp.h"
42 #include "opt_nfsroot.h"
44 #include <sys/param.h>
45 #include <sys/sockio.h>
47 #include <sys/vnode.h>
48 #include <sys/fcntl.h>
49 #include <sys/kernel.h>
50 #include <sys/sysctl.h>
51 #include <sys/malloc.h>
52 #include <sys/mount.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/systm.h>
59 #include <vm/vm_extern.h>
60 #include <vm/vm_zone.h>
63 #include <net/route.h>
64 #include <netinet/in.h>
66 #include <sys/thread2.h>
67 #include <sys/mutex2.h>
75 #include "nfsm_subs.h"
76 #include "nfsdiskless.h"
77 #include "nfsmountrpc.h"
79 extern int nfs_mountroot(struct mount *mp);
80 extern void bootpc_init(void);
82 extern struct vop_ops nfsv2_vnode_vops;
83 extern struct vop_ops nfsv2_fifo_vops;
84 extern struct vop_ops nfsv2_spec_vops;
86 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header");
87 MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle");
88 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure");
89 MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data");
90 MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor");
91 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure");
92 MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables");
94 vm_zone_t nfsmount_zone;
96 struct nfsstats nfsstats;
97 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
98 SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
99 &nfsstats, nfsstats, "");
100 static int nfs_ip_paranoia = 1;
101 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
102 &nfs_ip_paranoia, 0, "");
105 SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, "");
109 * Tunable to determine the Read/Write unit size. Maximum value
110 * is NFS_MAXDATA. We also default to NFS_MAXDATA.
112 static int nfs_io_size = NFS_MAXDATA;
113 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_io_size, CTLFLAG_RW,
114 &nfs_io_size, 0, "NFS optimal I/O unit size");
116 static void nfs_decode_args (struct nfsmount *nmp,
117 struct nfs_args *argp);
118 static int mountnfs (struct nfs_args *,struct mount *,
119 struct sockaddr *,char *,char *,struct vnode **);
120 static int nfs_mount ( struct mount *mp, char *path, caddr_t data,
122 static int nfs_unmount ( struct mount *mp, int mntflags);
123 static int nfs_root ( struct mount *mp, struct vnode **vpp);
124 static int nfs_statfs ( struct mount *mp, struct statfs *sbp,
126 static int nfs_statvfs(struct mount *mp, struct statvfs *sbp,
128 static int nfs_sync ( struct mount *mp, int waitfor);
131 * nfs vfs operations.
133 static struct vfsops nfs_vfsops = {
134 .vfs_mount = nfs_mount,
135 .vfs_unmount = nfs_unmount,
136 .vfs_root = nfs_root,
137 .vfs_statfs = nfs_statfs,
138 .vfs_statvfs = nfs_statvfs,
139 .vfs_sync = nfs_sync,
140 .vfs_init = nfs_init,
141 .vfs_uninit = nfs_uninit
143 VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK);
146 * This structure must be filled in by a primary bootstrap or bootstrap
147 * server for a diskless/dataless machine. It is initialized below just
148 * to ensure that it is allocated to initialized data (.data not .bss).
150 struct nfs_diskless nfs_diskless = { { { 0 } } };
151 struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
152 int nfs_diskless_valid = 0;
154 SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
155 &nfs_diskless_valid, 0, "");
157 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
158 nfsv3_diskless.root_hostnam, 0, "");
160 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
161 &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr,
162 "%Ssockaddr_in", "");
164 SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD,
165 nfsv3_diskless.swap_hostnam, 0, "");
167 SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD,
168 &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr,
172 void nfsargs_ntoh (struct nfs_args *);
173 static int nfs_mountdiskless (char *, char *, int,
174 struct sockaddr_in *, struct nfs_args *,
175 struct thread *, struct vnode **,
177 static void nfs_convert_diskless (void);
178 static void nfs_convert_oargs (struct nfs_args *args,
179 struct onfs_args *oargs);
182 * Calculate the buffer I/O block size to use. The maximum V2 block size
183 * is typically 8K, the maximum datagram size is typically 16K, and the
184 * maximum V3 block size is typically 32K. The buffer cache tends to work
185 * best with 16K blocks but we allow 32K for TCP connections.
187 * We force the block size to be at least a page for buffer cache efficiency.
190 nfs_iosize(int v3, int sotype)
196 if (sotype == SOCK_STREAM)
199 iomax = NFS_MAXDGRAMDATA;
201 iomax = NFS_V2MAXDATA;
203 if ((iosize = nfs_io_size) > iomax)
205 if (iosize < PAGE_SIZE)
209 * This is an aweful hack but until the buffer cache is rewritten
210 * we need it. The problem is that when you combine write() with
211 * mmap() the vm_page->valid bits can become weird looking
212 * (e.g. 0xfc). This occurs because NFS uses piecemeal buffers
213 * at the file EOF. To solve the problem the BIO system needs to
214 * be guarenteed that the NFS iosize for regular files will be a
215 * multiple of PAGE_SIZE so it can invalidate the whole page
216 * rather then just the piece of it owned by the buffer when
217 * NFS does vinvalbuf() calls.
219 if (iosize & PAGE_MASK)
220 iosize = (iosize & ~PAGE_MASK) + PAGE_SIZE;
225 nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs)
227 args->version = NFS_ARGSVERSION;
228 args->addr = oargs->addr;
229 args->addrlen = oargs->addrlen;
230 args->sotype = oargs->sotype;
231 args->proto = oargs->proto;
232 args->fh = oargs->fh;
233 args->fhsize = oargs->fhsize;
234 args->flags = oargs->flags;
235 args->wsize = oargs->wsize;
236 args->rsize = oargs->rsize;
237 args->readdirsize = oargs->readdirsize;
238 args->timeo = oargs->timeo;
239 args->retrans = oargs->retrans;
240 args->maxgrouplist = oargs->maxgrouplist;
241 args->readahead = oargs->readahead;
242 args->deadthresh = oargs->deadthresh;
243 args->hostname = oargs->hostname;
247 nfs_convert_diskless(void)
251 bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif,
252 sizeof(struct ifaliasreq));
253 bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway,
254 sizeof(struct sockaddr_in));
255 nfs_convert_oargs(&nfsv3_diskless.swap_args, &nfs_diskless.swap_args);
258 * Copy the NFS handle passed from the diskless code.
260 * XXX CURRENTLY DISABLED - bootp passes us a NFSv2 handle which
261 * will fail utterly with HAMMER due to limitations with NFSv2
264 bcopy(nfs_diskless.swap_fh, nfsv3_diskless.swap_fh, NFSX_V2FH);
265 nfsv3_diskless.swap_fhsize = NFSX_V2FH;
266 for (i = NFSX_V2FH - 1; i >= 0; --i) {
267 if (nfs_diskless.swap_fh[i])
271 nfsv3_diskless.swap_fhsize = 0;
272 nfsv3_diskless.swap_fhsize = 0; /* FORCE DISABLE */
274 bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr,
275 sizeof(struct sockaddr_in));
276 bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN);
277 nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks;
278 bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred,
279 sizeof(struct ucred));
280 nfs_convert_oargs(&nfsv3_diskless.root_args, &nfs_diskless.root_args);
283 * Copy the NFS handle passed from the diskless code.
285 * XXX CURRENTLY DISABLED - bootp passes us a NFSv2 handle which
286 * will fail utterly with HAMMER due to limitations with NFSv2
289 bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH);
290 nfsv3_diskless.root_fhsize = NFSX_V2FH;
291 for (i = NFSX_V2FH - 1; i >= 0; --i) {
292 if (nfs_diskless.root_fh[i])
296 nfsv3_diskless.root_fhsize = 0;
297 nfsv3_diskless.root_fhsize = 0; /* FORCE DISABLE */
299 bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr,
300 sizeof(struct sockaddr_in));
301 bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN);
302 nfsv3_diskless.root_time = nfs_diskless.root_time;
303 bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam,
305 nfs_diskless_valid = 3;
312 nfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
315 struct nfs_statfs *sfp;
316 struct nfsmount *nmp = VFSTONFS(mp);
317 thread_t td = curthread;
318 int error = 0, retattr;
321 struct nfsm_info info;
324 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
326 lwkt_gettoken(&nmp->nm_token);
331 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
333 lwkt_reltoken(&nmp->nm_token);
337 /* ignore the passed cred */
339 cred->cr_ngroups = 1;
340 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
341 (void)nfs_fsinfo(nmp, vp, td);
342 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
343 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
344 ERROROUT(nfsm_fhtom(&info, vp));
345 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
347 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
348 NFS_LATTR_NOSHRINK));
351 if (info.mrep != NULL)
355 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
356 sbp->f_flags = nmp->nm_flag;
359 sbp->f_bsize = NFS_FABLKSIZE;
360 tquad = fxdr_hyper(&sfp->sf_tbytes);
361 sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
362 tquad = fxdr_hyper(&sfp->sf_fbytes);
363 sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
364 tquad = fxdr_hyper(&sfp->sf_abytes);
365 sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
366 sbp->f_files = (fxdr_unsigned(int32_t,
367 sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
368 sbp->f_ffree = (fxdr_unsigned(int32_t,
369 sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
371 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
372 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
373 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
374 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
380 * Some values are pre-set in mnt_stat. Note in particular f_iosize
381 * cannot be changed once the filesystem is mounted as it is used
382 * as the basis for BIOs.
384 if (sbp != &mp->mnt_stat) {
385 sbp->f_type = mp->mnt_vfc->vfc_typenum;
386 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
387 sbp->f_iosize = mp->mnt_stat.f_iosize;
394 lwkt_reltoken(&nmp->nm_token);
399 nfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
402 struct nfs_statfs *sfp;
403 struct nfsmount *nmp = VFSTONFS(mp);
404 thread_t td = curthread;
405 int error = 0, retattr;
407 struct nfsm_info info;
410 info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
411 lwkt_gettoken(&nmp->nm_token);
416 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
418 lwkt_reltoken(&nmp->nm_token);
422 /* ignore the passed cred */
424 cred->cr_ngroups = 1;
425 if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
426 (void)nfs_fsinfo(nmp, vp, td);
427 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
428 nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
429 ERROROUT(nfsm_fhtom(&info, vp));
430 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
432 ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
433 NFS_LATTR_NOSHRINK));
436 if (info.mrep != NULL)
440 NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
441 sbp->f_flag = nmp->nm_flag;
442 sbp->f_owner = nmp->nm_cred->cr_ruid;
445 sbp->f_bsize = NFS_FABLKSIZE;
446 sbp->f_frsize = NFS_FABLKSIZE;
447 sbp->f_blocks = (fxdr_hyper(&sfp->sf_tbytes) /
448 ((u_quad_t)NFS_FABLKSIZE));
449 sbp->f_bfree = (fxdr_hyper(&sfp->sf_fbytes) /
450 ((u_quad_t)NFS_FABLKSIZE));
451 sbp->f_bavail = (fxdr_hyper(&sfp->sf_abytes) /
452 ((u_quad_t)NFS_FABLKSIZE));
453 sbp->f_files = fxdr_hyper(&sfp->sf_tfiles);
454 sbp->f_ffree = fxdr_hyper(&sfp->sf_ffiles);
455 sbp->f_favail = fxdr_hyper(&sfp->sf_afiles);
457 sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
458 sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
459 sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
460 sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
465 sbp->f_syncreads = 0;
466 sbp->f_syncwrites = 0;
467 sbp->f_asyncreads = 0;
468 sbp->f_asyncwrites = 0;
469 sbp->f_type = mp->mnt_vfc->vfc_typenum;
476 lwkt_reltoken(&nmp->nm_token);
481 * nfs version 3 fsinfo rpc call
484 nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td)
486 struct nfsv3_fsinfo *fsp;
488 int error = 0, retattr;
490 struct nfsm_info info;
493 nfsstats.rpccnt[NFSPROC_FSINFO]++;
494 nfsm_reqhead(&info, vp, NFSPROC_FSINFO, NFSX_FH(1));
495 ERROROUT(nfsm_fhtom(&info, vp));
496 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSINFO, td,
497 nfs_vpcred(vp, ND_READ), &error));
498 ERROROUT(nfsm_postop_attr(&info, vp, &retattr, NFS_LATTR_NOSHRINK));
500 NULLOUT(fsp = nfsm_dissect(&info, NFSX_V3FSINFO));
501 pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
502 if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
503 nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
504 ~(NFS_FABLKSIZE - 1);
505 max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
506 if (max < nmp->nm_wsize && max > 0) {
507 nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
508 if (nmp->nm_wsize == 0)
511 pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
512 if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
513 nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
514 ~(NFS_FABLKSIZE - 1);
515 max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
516 if (max < nmp->nm_rsize && max > 0) {
517 nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
518 if (nmp->nm_rsize == 0)
521 pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
522 if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ)
523 nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
524 ~(NFS_DIRBLKSIZ - 1);
525 if (max < nmp->nm_readdirsize && max > 0) {
526 nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
527 if (nmp->nm_readdirsize == 0)
528 nmp->nm_readdirsize = max;
530 maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
531 if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
532 nmp->nm_maxfilesize = maxfsize;
533 nmp->nm_state |= NFSSTA_GOTFSINFO;
536 * Use the smaller of rsize/wsize for the biosize.
538 if (nmp->nm_rsize < nmp->nm_wsize)
539 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_rsize;
541 nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_wsize;
550 * Mount a remote root fs via. nfs. This depends on the info in the
551 * nfs_diskless structure that has been filled in properly by some primary
553 * It goes something like this:
554 * - do enough of "ifconfig" by calling ifioctl() so that the system
555 * can talk to the server
556 * - If nfs_diskless.mygateway is filled in, use that address as
558 * - build the rootfs mount point and call mountnfs() to do the rest.
561 nfs_mountroot(struct mount *mp)
563 struct mount *swap_mp;
564 struct nfsv3_diskless *nd = &nfsv3_diskless;
567 struct thread *td = curthread; /* XXX */
572 #if defined(BOOTP_NFSROOT) && defined(BOOTP)
573 bootpc_init(); /* use bootp to get nfs_diskless filled in */
577 * XXX time must be non-zero when we init the interface or else
578 * the arp code will wedge...
580 while (mycpu->gd_time_seconds == 0)
581 tsleep(mycpu, 0, "arpkludge", 10);
584 * The boot code may have passed us a diskless structure.
586 kprintf("DISKLESS %d\n", nfs_diskless_valid);
587 if (nfs_diskless_valid == 1)
588 nfs_convert_diskless();
593 nd->root_args.flags |= NFSMNT_NFSV3 | NFSMNT_RDIRPLUS;
594 nd->swap_args.flags |= NFSMNT_NFSV3;
596 #define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr))
597 kprintf("nfs_mountroot: interface %s ip %s",
599 inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr));
601 inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr));
602 kprintf(" mask %s\n",
603 inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr));
607 * XXX splnet, so networks will receive...
612 * BOOTP does not necessarily have to be compiled into the kernel
613 * for an NFS root to work. If we inherited the network
614 * configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured
615 * out our interface for us and all we need to do is ifconfig the
616 * interface. We only do this if the interface has not already been
617 * ifconfig'd by e.g. BOOTP.
619 error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td);
621 panic("nfs_mountroot: socreate(%04x): %d",
622 nd->myif.ifra_addr.sa_family, error);
625 error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, proc0.p_ucred);
627 panic("nfs_mountroot: SIOCAIFADDR: %d", error);
629 soclose(so, FNONBLOCK);
632 * If the gateway field is filled in, set it as the default route.
634 if (nd->mygateway.sin_len != 0) {
635 struct sockaddr_in mask, sin;
637 bzero((caddr_t)&mask, sizeof(mask));
639 sin.sin_family = AF_INET;
640 sin.sin_len = sizeof(sin);
641 kprintf("nfs_mountroot: gateway %s\n",
642 inet_ntoa(nd->mygateway.sin_addr));
643 error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin,
644 (struct sockaddr *)&nd->mygateway,
645 (struct sockaddr *)&mask,
646 RTF_UP | RTF_GATEWAY);
648 kprintf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error);
652 * Create the rootfs mount point.
654 nd->root_args.fh = nd->root_fh;
655 nd->root_args.fhsize = nd->root_fhsize;
656 l = ntohl(nd->root_saddr.sin_addr.s_addr);
657 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
658 (l >> 24) & 0xff, (l >> 16) & 0xff,
659 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
660 kprintf("NFS_ROOT: %s\n",buf);
661 error = nfs_mountdiskless(buf, "/", MNT_RDONLY, &nd->root_saddr,
662 &nd->root_args, td, &vp, &mp);
664 mp->mnt_vfc->vfc_refcount--;
670 if (nd->swap_nblks) {
672 /* Convert to DEV_BSIZE instead of Kilobyte */
676 * Create a fake mount point just for the swap vnode so that the
677 * swap file can be on a different server from the rootfs.
679 nd->swap_args.fh = nd->swap_fh;
680 nd->swap_args.fhsize = nd->swap_fhsize;
681 l = ntohl(nd->swap_saddr.sin_addr.s_addr);
682 ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
683 (l >> 24) & 0xff, (l >> 16) & 0xff,
684 (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
685 kprintf("NFS SWAP: %s\n",buf);
686 error = nfs_mountdiskless(buf, "/swap", 0, &nd->swap_saddr,
687 &nd->swap_args, td, &vp, &swap_mp);
694 VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
695 nd->swap_nblks * DEV_BSIZE ;
698 * Since the swap file is not the root dir of a file system,
699 * hack it to a regular file.
701 vclrflags(vp, VROOT);
703 nfs_setvtype(vp, VREG);
704 swaponvp(td, vp, nd->swap_nblks);
707 mp->mnt_flag |= MNT_ROOTFS;
711 * This is not really an nfs issue, but it is much easier to
712 * set hostname here and then let the "/etc/rc.xxx" files
713 * mount the right /var based upon its preset value.
715 bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN);
716 hostname[MAXHOSTNAMELEN - 1] = '\0';
717 for (i = 0; i < MAXHOSTNAMELEN; i++)
718 if (hostname[i] == '\0')
720 inittodr(ntohl(nd->root_time));
726 * Internal version of mount system call for diskless setup.
729 nfs_mountdiskless(char *path, char *which, int mountflag,
730 struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
731 struct vnode **vpp, struct mount **mpp)
734 struct sockaddr *nam;
741 if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) {
742 kprintf("nfs_mountroot: NFS not configured");
747 mp->mnt_kern_flag = 0;
748 mp->mnt_flag = mountflag;
749 nam = dup_sockaddr((struct sockaddr *)sin);
751 #if defined(BOOTP) || defined(NFS_ROOT)
752 if (args->fhsize == 0) {
755 kprintf("NFS_ROOT: No FH passed from loader, attempting "
757 while (*xpath && *xpath != ':')
762 error = md_mount(sin, xpath, args->fh, &args->fhsize, args, td);
764 kprintf("failed error %d.\n", error);
767 kprintf("success!\n");
771 if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) {
772 #if defined(BOOTP) || defined(NFS_ROOT)
775 kprintf("nfs_mountroot: mount %s on %s: %d", path, which, error);
776 mp->mnt_vfc->vfc_refcount--;
788 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
795 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
796 * no sense in that context.
798 if (nmp->nm_sotype == SOCK_STREAM) {
799 nmp->nm_flag &= ~NFSMNT_NOCONN;
800 argp->flags &= ~NFSMNT_NOCONN;
804 * readdirplus is NFSv3 only.
806 if ((argp->flags & NFSMNT_NFSV3) == 0) {
807 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
808 argp->flags &= ~NFSMNT_RDIRPLUS;
812 * Re-bind if rsrvd port flag has changed
814 adjsock = (nmp->nm_flag & NFSMNT_RESVPORT) !=
815 (argp->flags & NFSMNT_RESVPORT);
817 /* Update flags atomically. Don't change the lock bits. */
818 nmp->nm_flag = argp->flags | nmp->nm_flag;
821 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
822 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
823 if (nmp->nm_timeo < NFS_MINTIMEO)
824 nmp->nm_timeo = NFS_MINTIMEO;
825 else if (nmp->nm_timeo > NFS_MAXTIMEO)
826 nmp->nm_timeo = NFS_MAXTIMEO;
829 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
830 nmp->nm_retry = argp->retrans;
831 if (nmp->nm_retry > NFS_MAXREXMIT)
832 nmp->nm_retry = NFS_MAXREXMIT;
836 * These parameters effect the buffer cache and cannot be changed
837 * once we've successfully mounted.
839 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
840 maxio = nfs_iosize(argp->flags & NFSMNT_NFSV3, nmp->nm_sotype);
842 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
843 nmp->nm_wsize = argp->wsize;
844 /* Round down to multiple of blocksize */
845 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
846 if (nmp->nm_wsize <= 0)
847 nmp->nm_wsize = NFS_FABLKSIZE;
849 if (nmp->nm_wsize > maxio)
850 nmp->nm_wsize = maxio;
851 if (nmp->nm_wsize > MAXBSIZE)
852 nmp->nm_wsize = MAXBSIZE;
854 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
855 nmp->nm_rsize = argp->rsize;
856 /* Round down to multiple of blocksize */
857 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
858 if (nmp->nm_rsize <= 0)
859 nmp->nm_rsize = NFS_FABLKSIZE;
861 if (nmp->nm_rsize > maxio)
862 nmp->nm_rsize = maxio;
863 if (nmp->nm_rsize > MAXBSIZE)
864 nmp->nm_rsize = MAXBSIZE;
866 if ((argp->flags & NFSMNT_READDIRSIZE) &&
867 argp->readdirsize > 0) {
868 nmp->nm_readdirsize = argp->readdirsize;
870 if (nmp->nm_readdirsize > maxio)
871 nmp->nm_readdirsize = maxio;
872 if (nmp->nm_readdirsize > nmp->nm_rsize)
873 nmp->nm_readdirsize = nmp->nm_rsize;
876 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
877 nmp->nm_acregmin = argp->acregmin;
879 nmp->nm_acregmin = NFS_MINATTRTIMO;
880 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
881 nmp->nm_acregmax = argp->acregmax;
883 nmp->nm_acregmax = NFS_MAXATTRTIMO;
884 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
885 nmp->nm_acdirmin = argp->acdirmin;
887 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
888 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
889 nmp->nm_acdirmax = argp->acdirmax;
891 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
892 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
893 nmp->nm_acdirmin = nmp->nm_acdirmax;
894 if (nmp->nm_acregmin > nmp->nm_acregmax)
895 nmp->nm_acregmin = nmp->nm_acregmax;
897 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
898 if (argp->maxgrouplist <= NFS_MAXGRPS)
899 nmp->nm_numgrps = argp->maxgrouplist;
901 nmp->nm_numgrps = NFS_MAXGRPS;
903 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
904 if (argp->readahead <= NFS_MAXRAHEAD)
905 nmp->nm_readahead = argp->readahead;
907 nmp->nm_readahead = NFS_MAXRAHEAD;
909 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) {
910 if (argp->deadthresh <= NFS_NEVERDEAD)
911 nmp->nm_deadthresh = argp->deadthresh;
913 nmp->nm_deadthresh = NFS_NEVERDEAD;
916 if (nmp->nm_so && adjsock) {
917 nfs_safedisconnect(nmp);
918 if (nmp->nm_sotype == SOCK_DGRAM)
919 while (nfs_connect(nmp, NULL)) {
920 kprintf("nfs_args: retrying connect\n");
921 (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0);
930 * It seems a bit dumb to copyinstr() the host and path here and then
931 * bcopy() them in mountnfs(), but I wanted to detect errors before
932 * doing the sockargs() call because sockargs() allocates an mbuf and
933 * an error after that means that I have to release the mbuf.
937 nfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
940 struct nfs_args args;
941 struct sockaddr *nam;
943 char pth[MNAMELEN], hst[MNAMELEN];
945 u_char nfh[NFSX_V3FHMAX];
951 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
954 if (args.version != NFS_ARGSVERSION) {
955 #ifdef COMPAT_PRELITE2
957 * If the argument version is unknown, then assume the
958 * caller is a pre-lite2 4.4BSD client and convert its
961 struct onfs_args oargs;
962 error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args));
965 nfs_convert_oargs(&args,&oargs);
966 #else /* !COMPAT_PRELITE2 */
967 return (EPROGMISMATCH);
968 #endif /* COMPAT_PRELITE2 */
970 if (mp->mnt_flag & MNT_UPDATE) {
971 struct nfsmount *nmp = VFSTONFS(mp);
976 * When doing an update, we can't change from or to
977 * v3, or change cookie translation, or rsize or wsize.
979 args.flags &= ~(NFSMNT_NFSV3 | NFSMNT_RSIZE | NFSMNT_WSIZE);
980 args.flags |= nmp->nm_flag & (NFSMNT_NFSV3);
981 nfs_decode_args(nmp, &args);
986 * Make the nfs_ip_paranoia sysctl serve as the default connection
987 * or no-connection mode for those protocols that support
988 * no-connection mode (the flag will be cleared later for protocols
989 * that do not support no-connection mode). This will allow a client
990 * to receive replies from a different IP then the request was
991 * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
994 if (nfs_ip_paranoia == 0)
995 args.flags |= NFSMNT_NOCONN;
996 if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
998 error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
1001 error = copyinstr(path, pth, MNAMELEN-1, &len);
1004 bzero(&pth[len], MNAMELEN - len);
1005 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
1008 bzero(&hst[len], MNAMELEN - len);
1009 /* sockargs() call must be after above copyin() calls */
1010 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
1014 error = mountnfs(&args, mp, nam, pth, hst, &vp);
1019 * Common code for mount and mountroot
1022 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
1023 char *pth, char *hst, struct vnode **vpp)
1025 struct nfsmount *nmp;
1031 if (mp->mnt_flag & MNT_UPDATE) {
1033 /* update paths, file handles, etc, here XXX */
1034 FREE(nam, M_SONAME);
1037 nmp = zalloc(nfsmount_zone);
1038 bzero((caddr_t)nmp, sizeof (struct nfsmount));
1039 mtx_init(&nmp->nm_rxlock);
1040 mtx_init(&nmp->nm_txlock);
1041 TAILQ_INIT(&nmp->nm_uidlruhead);
1042 TAILQ_INIT(&nmp->nm_bioq);
1043 TAILQ_INIT(&nmp->nm_reqq);
1044 TAILQ_INIT(&nmp->nm_reqtxq);
1045 TAILQ_INIT(&nmp->nm_reqrxq);
1046 mp->mnt_data = (qaddr_t)nmp;
1047 lwkt_token_init(&nmp->nm_token, 1, "nfs_token");
1050 nmp->nm_mountp = mp;
1051 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE;
1053 lwkt_gettoken(&nmp->nm_token);
1056 * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
1057 * high, depending on whether we end up with negative offsets in
1058 * the client or server somewhere. 2GB-1 may be safer.
1060 * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
1061 * that we can handle until we find out otherwise.
1062 * XXX Our "safe" limit on the client is what we can store in our
1063 * buffer cache using signed(!) block numbers.
1065 if ((argp->flags & NFSMNT_NFSV3) == 0)
1066 nmp->nm_maxfilesize = 0xffffffffLL;
1068 nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
1070 nmp->nm_timeo = NFS_TIMEO;
1071 nmp->nm_retry = NFS_RETRANS;
1072 nmp->nm_wsize = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype);
1073 nmp->nm_rsize = nmp->nm_wsize;
1074 nmp->nm_readdirsize = NFS_READDIRSIZE;
1075 nmp->nm_numgrps = NFS_MAXGRPS;
1076 nmp->nm_readahead = NFS_DEFRAHEAD;
1077 nmp->nm_deadthresh = NFS_DEADTHRESH;
1078 nmp->nm_fhsize = argp->fhsize;
1079 bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
1080 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
1082 /* Set up the sockets and per-host congestion */
1083 nmp->nm_sotype = argp->sotype;
1084 nmp->nm_soproto = argp->proto;
1085 nmp->nm_cred = crhold(proc0.p_ucred);
1087 nfs_decode_args(nmp, argp);
1090 * For Connection based sockets (TCP,...) defer the connect until
1091 * the first request, in case the server is not responding.
1093 if (nmp->nm_sotype == SOCK_DGRAM &&
1094 (error = nfs_connect(nmp, NULL)))
1098 * This is silly, but it has to be set so that vinifod() works.
1099 * We do not want to do an nfs_statfs() here since we can get
1100 * stuck on a dead server and we are holding a lock on the mount
1103 mp->mnt_stat.f_iosize =
1104 nfs_iosize(nmp->nm_flag & NFSMNT_NFSV3, nmp->nm_sotype);
1107 * Install vop_ops for our vnops
1109 vfs_add_vnodeops(mp, &nfsv2_vnode_vops, &mp->mnt_vn_norm_ops);
1110 vfs_add_vnodeops(mp, &nfsv2_spec_vops, &mp->mnt_vn_spec_ops);
1111 vfs_add_vnodeops(mp, &nfsv2_fifo_vops, &mp->mnt_vn_fifo_ops);
1114 * A reference count is needed on the nfsnode representing the
1115 * remote root. If this object is not persistent, then backward
1116 * traversals of the mount point (i.e. "..") will not work if
1117 * the nfsnode gets flushed out of the cache. Ufs does not have
1118 * this problem, because one can identify root inodes by their
1119 * number == ROOTINO (2).
1121 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
1127 * Retrieval of mountpoint attributes is delayed until nfs_rot
1128 * or nfs_statfs are first called. This will happen either when
1129 * we first traverse the mount point or if somebody does a df(1).
1131 * NFSSTA_GOTFSINFO is used to flag if we have successfully
1132 * retrieved mountpoint attributes. In the case of NFSv3 we
1133 * also flag static fsinfo.
1136 (*vpp)->v_type = VNON;
1139 * Lose the lock but keep the ref.
1142 lwkt_gettoken(&nfs_token);
1143 TAILQ_INSERT_TAIL(&nfs_mountq, nmp, nm_entry);
1144 lwkt_reltoken(&nfs_token);
1168 * Start the reader and writer threads.
1170 lwkt_create(nfssvc_iod_reader, nmp, &nmp->nm_rxthread,
1171 NULL, 0, rxcpu, "nfsiod_rx");
1172 lwkt_create(nfssvc_iod_writer, nmp, &nmp->nm_txthread,
1173 NULL, 0, txcpu, "nfsiod_tx");
1174 lwkt_reltoken(&nmp->nm_token);
1177 nfs_disconnect(nmp);
1178 lwkt_reltoken(&nmp->nm_token);
1179 nfs_free_mount(nmp);
1184 * unmount system call
1187 nfs_unmount(struct mount *mp, int mntflags)
1189 struct nfsmount *nmp;
1190 int error, flags = 0;
1193 lwkt_gettoken(&nmp->nm_token);
1194 if (mntflags & MNT_FORCE) {
1195 flags |= FORCECLOSE;
1196 nmp->nm_flag |= NFSMNT_FORCE;
1200 * Goes something like this..
1201 * - Call vflush() to clear out vnodes for this file system
1202 * - Close the socket
1203 * - Free up the data structures
1205 /* In the forced case, cancel any outstanding requests. */
1206 if (flags & FORCECLOSE) {
1207 error = nfs_nmcancelreqs(nmp);
1209 kprintf("NFS: %s: Unable to cancel all requests\n",
1210 mp->mnt_stat.f_mntfromname);
1211 /* continue anyway */
1216 * Must handshake with nfs_clientd() if it is active. XXX
1218 nmp->nm_state |= NFSSTA_DISMINPROG;
1221 * We hold 1 extra ref on the root vnode; see comment in mountnfs().
1223 * If this doesn't work and we are doing a forced unmount we continue
1226 error = vflush(mp, 1, flags);
1228 nmp->nm_state &= ~NFSSTA_DISMINPROG;
1229 if ((flags & FORCECLOSE) == 0) {
1230 lwkt_reltoken(&nmp->nm_token);
1236 * We are now committed to the unmount.
1237 * For NQNFS, let the server daemon free the nfsmount structure.
1239 if (nmp->nm_flag & NFSMNT_KERB)
1240 nmp->nm_state |= NFSSTA_DISMNT;
1241 nfssvc_iod_stop1(nmp);
1242 nfs_disconnect(nmp);
1243 nfssvc_iod_stop2(nmp);
1245 lwkt_gettoken(&nfs_token);
1246 TAILQ_REMOVE(&nfs_mountq, nmp, nm_entry);
1247 lwkt_reltoken(&nfs_token);
1249 lwkt_reltoken(&nmp->nm_token);
1251 if ((nmp->nm_flag & NFSMNT_KERB) == 0) {
1252 nfs_free_mount(nmp);
1258 nfs_free_mount(struct nfsmount *nmp)
1261 crfree(nmp->nm_cred);
1262 nmp->nm_cred = NULL;
1265 FREE(nmp->nm_nam, M_SONAME);
1268 zfree(nfsmount_zone, nmp);
1272 * Return root of a filesystem
1275 nfs_root(struct mount *mp, struct vnode **vpp)
1278 struct nfsmount *nmp;
1284 lwkt_gettoken(&nmp->nm_token);
1285 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
1287 lwkt_reltoken(&nmp->nm_token);
1293 * Get transfer parameters and root vnode attributes
1295 * NOTE: nfs_fsinfo() is expected to override the default
1298 if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
1299 if (nmp->nm_flag & NFSMNT_NFSV3) {
1300 mp->mnt_stat.f_iosize = nfs_iosize(1, nmp->nm_sotype);
1301 error = nfs_fsinfo(nmp, vp, curthread);
1303 if ((error = VOP_GETATTR(vp, &attrs)) == 0)
1304 nmp->nm_state |= NFSSTA_GOTFSINFO;
1309 * The root vnode is usually cached by the namecache so do not
1310 * try to avoid going over the wire even if we have previous
1311 * information cached. A stale NFS mount can loop
1312 * forever resolving the root vnode if we return no-error when
1313 * there is in fact an error.
1315 np->n_attrstamp = 0;
1316 error = VOP_GETATTR(vp, &attrs);
1318 if (vp->v_type == VNON)
1319 nfs_setvtype(vp, VDIR);
1320 vsetflags(vp, VROOT);
1325 lwkt_reltoken(&nmp->nm_token);
1335 static int nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data);
1336 static int nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
1339 * Flush out the buffer cache
1343 nfs_sync(struct mount *mp, int waitfor)
1345 struct nfsmount *nmp = VFSTONFS(mp);
1346 struct scaninfo scaninfo;
1349 scaninfo.rescan = 1;
1350 scaninfo.waitfor = waitfor;
1351 scaninfo.allerror = 0;
1354 * Force stale buffer cache information to be flushed.
1356 lwkt_gettoken(&nmp->nm_token);
1358 while (error == 0 && scaninfo.rescan) {
1359 scaninfo.rescan = 0;
1360 error = vmntvnodescan(mp, VMSC_GETVP, nfs_sync_scan1,
1361 nfs_sync_scan2, &scaninfo);
1363 lwkt_reltoken(&nmp->nm_token);
1368 nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data)
1370 struct scaninfo *info = data;
1372 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree))
1374 if (info->waitfor == MNT_LAZY)
1380 nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
1382 struct scaninfo *info = data;
1385 error = VOP_FSYNC(vp, info->waitfor, 0);
1387 info->allerror = error;