2 /* $Id: nfs_vfsops.c,v 1.38 2003/11/05 14:59:01 rees Exp $ */
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25 * advised of the possibility of such damages.
29 * Copyright (c) 1989, 1993, 1995
30 * The Regents of the University of California. All rights reserved.
32 * This code is derived from software contributed to Berkeley by
33 * Rick Macklem at The University of Guelph.
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36 * modification, are permitted provided that the following conditions
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
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52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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59 * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
62 #include <sys/cdefs.h>
63 __FBSDID("$FreeBSD$");
65 #include "opt_bootp.h"
66 #include "opt_nfsroot.h"
68 #include <sys/param.h>
69 #include <sys/systm.h>
70 #include <sys/kernel.h>
71 #include <sys/kthread.h>
72 #include <sys/limits.h>
74 #include <sys/malloc.h>
76 #include <sys/module.h>
77 #include <sys/mount.h>
79 #include <sys/socket.h>
80 #include <sys/socketvar.h>
81 #include <sys/sockio.h>
82 #include <sys/sysctl.h>
83 #include <sys/unistd.h>
84 #include <sys/vnode.h>
87 #include <vm/vm_extern.h>
91 #include <net/route.h>
92 #include <netinet/in.h>
93 #include <netinet/in_var.h>
95 #include <rpc/rpcclnt.h>
97 #include <nfs/rpcv2.h>
98 #include <nfs/nfsproto.h>
99 #include <nfsclient/nfs.h>
100 #include <nfs4client/nfs4.h>
101 #include <nfsclient/nfsnode.h>
102 #include <nfsclient/nfsmount.h>
103 #include <nfs/xdr_subs.h>
104 #include <nfsclient/nfsm_subs.h>
105 #include <nfsclient/nfsdiskless.h>
107 #include <nfs4client/nfs4m_subs.h>
108 #include <nfs4client/nfs4_vfs.h>
110 #include <nfs4client/nfs4_dev.h>
111 #include <nfs4client/nfs4_idmap.h>
113 SYSCTL_NODE(_vfs, OID_AUTO, nfs4, CTLFLAG_RW, 0, "NFS4 filesystem");
114 SYSCTL_STRUCT(_vfs_nfs4, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
115 &nfsstats, nfsstats, "S,nfsstats");
117 static void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp);
118 static void nfs4_daemon(void *arg);
119 static int mountnfs(struct nfs_args *, struct mount *,
120 struct sockaddr *, char *, char *, struct vnode **,
122 static int nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred);
123 static vfs_mount_t nfs_mount;
124 static vfs_unmount_t nfs_unmount;
125 static vfs_root_t nfs_root;
126 static vfs_statfs_t nfs_statfs;
127 static vfs_sync_t nfs_sync;
130 * nfs vfs operations.
132 static struct vfsops nfs_vfsops = {
133 .vfs_init = nfs4_init,
134 .vfs_mount = nfs_mount,
135 .vfs_root = nfs_root,
136 .vfs_statfs = nfs_statfs,
137 .vfs_sync = nfs_sync,
138 .vfs_uninit = nfs4_uninit,
139 .vfs_unmount = nfs_unmount,
141 VFS_SET(nfs_vfsops, nfs4, VFCF_NETWORK);
143 static struct nfs_rpcops nfs4_rpcops = {
152 /* So that loader and kldload(2) can find us, wherever we are.. */
153 MODULE_VERSION(nfs4, 1);
155 void nfsargs_ntoh(struct nfs_args *);
158 nfs4_init(struct vfsconf *vfsp)
170 nfs4_uninit(struct vfsconf *vfsp)
184 nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
187 struct nfs_statfs *sfp;
189 struct nfsmount *nmp = VFSTONFS(mp);
191 struct mbuf *mreq, *mrep = NULL, *md, *mb;
193 struct nfs4_compound cp;
194 struct nfs4_oparg_getattr ga;
195 struct nfsv4_fattr *fap = &ga.fa;
200 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
204 nfsstats.rpccnt[NFSPROC_FSSTAT]++;
205 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1));
207 bpos = mtod(mb, caddr_t);
209 ga.bm = &nfsv4_fsattrbm;
210 nfs_v4initcompound(&cp);
212 nfsm_v4build_compound(&cp, "statfs()");
213 nfsm_v4build_putfh(&cp, vp);
214 nfsm_v4build_getattr(&cp, &ga);
215 nfsm_v4build_finalize(&cp);
217 nfsm_request(vp, NFSV4PROC_COMPOUND, td, td->td_ucred);
221 nfsm_v4dissect_compound(&cp);
222 nfsm_v4dissect_putfh(&cp);
223 nfsm_v4dissect_getattr(&cp, &ga);
225 nfs4_vfsop_statfs(fap, sbp, mp);
228 error = nfs_v4postop(&cp, error);
238 nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
246 * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
247 * no sense in that context.
249 if (argp->sotype == SOCK_STREAM)
250 nmp->nm_flag &= ~NFSMNT_NOCONN;
252 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
254 /* Re-bind if rsrvd port requested and wasn't on one */
255 adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
256 && (argp->flags & NFSMNT_RESVPORT);
257 /* Also re-bind if we're switching to/from a connected UDP socket */
258 adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
259 (argp->flags & NFSMNT_NOCONN));
261 /* Update flags atomically. Don't change the lock bits. */
262 nmp->nm_flag = argp->flags | nmp->nm_flag;
265 if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
266 nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
267 if (nmp->nm_timeo < NFS_MINTIMEO)
268 nmp->nm_timeo = NFS_MINTIMEO;
269 else if (nmp->nm_timeo > NFS_MAXTIMEO)
270 nmp->nm_timeo = NFS_MAXTIMEO;
273 if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
274 nmp->nm_retry = argp->retrans;
275 if (nmp->nm_retry > NFS_MAXREXMIT)
276 nmp->nm_retry = NFS_MAXREXMIT;
279 if (argp->flags & NFSMNT_NFSV3) {
280 if (argp->sotype == SOCK_DGRAM)
281 maxio = NFS_MAXDGRAMDATA;
285 maxio = NFS_V2MAXDATA;
287 if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
288 nmp->nm_wsize = argp->wsize;
289 /* Round down to multiple of blocksize */
290 nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
291 if (nmp->nm_wsize <= 0)
292 nmp->nm_wsize = NFS_FABLKSIZE;
294 if (nmp->nm_wsize > maxio)
295 nmp->nm_wsize = maxio;
296 if (nmp->nm_wsize > MAXBSIZE)
297 nmp->nm_wsize = MAXBSIZE;
299 if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
300 nmp->nm_rsize = argp->rsize;
301 /* Round down to multiple of blocksize */
302 nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
303 if (nmp->nm_rsize <= 0)
304 nmp->nm_rsize = NFS_FABLKSIZE;
306 if (nmp->nm_rsize > maxio)
307 nmp->nm_rsize = maxio;
308 if (nmp->nm_rsize > MAXBSIZE)
309 nmp->nm_rsize = MAXBSIZE;
311 if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
312 nmp->nm_readdirsize = argp->readdirsize;
314 if (nmp->nm_readdirsize > maxio)
315 nmp->nm_readdirsize = maxio;
316 if (nmp->nm_readdirsize > nmp->nm_rsize)
317 nmp->nm_readdirsize = nmp->nm_rsize;
319 if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
320 nmp->nm_acregmin = argp->acregmin;
322 nmp->nm_acregmin = NFS_MINATTRTIMO;
323 if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
324 nmp->nm_acregmax = argp->acregmax;
326 nmp->nm_acregmax = NFS_MAXATTRTIMO;
327 if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
328 nmp->nm_acdirmin = argp->acdirmin;
330 nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
331 if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
332 nmp->nm_acdirmax = argp->acdirmax;
334 nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
335 if (nmp->nm_acdirmin > nmp->nm_acdirmax)
336 nmp->nm_acdirmin = nmp->nm_acdirmax;
337 if (nmp->nm_acregmin > nmp->nm_acregmax)
338 nmp->nm_acregmin = nmp->nm_acregmax;
340 if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
341 if (argp->maxgrouplist <= NFS_MAXGRPS)
342 nmp->nm_numgrps = argp->maxgrouplist;
344 nmp->nm_numgrps = NFS_MAXGRPS;
346 if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
347 if (argp->readahead <= NFS_MAXRAHEAD)
348 nmp->nm_readahead = argp->readahead;
350 nmp->nm_readahead = NFS_MAXRAHEAD;
352 if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
353 if (argp->deadthresh <= NFS_MAXDEADTHRESH)
354 nmp->nm_deadthresh = argp->deadthresh;
356 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
359 adjsock |= ((nmp->nm_sotype != argp->sotype) ||
360 (nmp->nm_soproto != argp->proto));
361 nmp->nm_sotype = argp->sotype;
362 nmp->nm_soproto = argp->proto;
364 if (nmp->nm_rpcclnt.rc_so && adjsock) {
365 nfs_safedisconnect(nmp);
366 if (nmp->nm_sotype == SOCK_DGRAM) {
367 while (nfs4_connect(nmp)) {
368 printf("nfs_args: retrying connect\n");
369 (void) tsleep((caddr_t)&lbolt,
380 * It seems a bit dumb to copyinstr() the host and path here and then
381 * bcopy() them in mountnfs(), but I wanted to detect errors before
382 * doing the sockargs() call because sockargs() allocates an mbuf and
383 * an error after that means that I have to release the mbuf.
387 nfs_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp,
391 struct nfs_args args;
392 struct sockaddr *nam;
398 printf("NFSv4: nfs_mountroot not supported\n");
401 error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
404 if (args.version != NFS_ARGSVERSION)
405 return (EPROGMISMATCH);
406 if (mp->mnt_flag & MNT_UPDATE) {
407 struct nfsmount *nmp = VFSTONFS(mp);
412 * When doing an update, we can't change from or to
413 * v3, switch lockd strategies or change cookie translation
415 args.flags = (args.flags &
416 ~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) |
418 (NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD));
419 nfs_decode_args(nmp, &args);
425 error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
428 bzero(&hst[len], MNAMELEN - len);
429 /* sockargs() call must be after above copyin() calls */
430 error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
433 error = mountnfs(&args, mp, nam, path, hst, &vp, td->td_ucred);
438 * renew should be done async
439 * should re-scan mount queue each time
441 struct proc *nfs4_daemonproc;
444 nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred)
446 struct nfs4_compound cp;
447 struct mbuf *mreq, *mrep = NULL, *md, *mb;
451 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t));
453 bpos = mtod(mb, caddr_t);
455 nfs_v4initcompound(&cp);
457 nfsm_v4build_compound(&cp, "nfs4_do_renew()");
458 nfsm_v4build_renew(&cp, nmp->nm_clientid);
459 nfsm_v4build_finalize(&cp);
461 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
465 nfsm_v4dissect_compound(&cp);
466 nfsm_v4dissect_renew(&cp);
467 nmp->nm_last_renewal = time_second;
471 error = nfs_v4postop(&cp, error);
480 nfs4_daemon(void *arg)
483 struct nfsmount *nmp;
488 mtx_lock(&mountlist_mtx);
489 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
490 if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0)
494 if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4)
496 mtx_unlock(&mountlist_mtx);
498 nfs4_do_renew(nmp, (struct ucred *) arg);
500 mtx_lock(&mountlist_mtx);
502 mtx_unlock(&mountlist_mtx);
504 /* Must kill the daemon here, or module unload will cause a panic */
507 nfs4_daemonproc = NULL;
509 printf("nfsv4 renewd exiting\n");
512 tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz);
517 * Common code for mount and mountroot
520 mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
521 char *pth, char *hst, struct vnode **vpp, struct ucred *cred)
523 struct nfsmount *nmp;
524 char *rpth, *cp1, *cp2;
525 int nlkup = 0, error;
526 struct nfs4_compound cp;
527 struct mbuf *mreq, *mrep = NULL, *md, *mb;
529 struct nfs4_oparg_lookup lkup;
530 struct nfs4_oparg_getfh gfh;
531 struct nfs4_oparg_getattr ga;
532 struct thread *td = curthread; /* XXX */
534 if (mp->mnt_flag & MNT_UPDATE) {
536 /* update paths, file handles, etc, here XXX */
540 nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
541 bzero((caddr_t)nmp, sizeof (struct nfsmount));
542 TAILQ_INIT(&nmp->nm_bufq);
543 mp->mnt_data = (qaddr_t)nmp;
548 nmp->nm_maxfilesize = 0xffffffffLL;
549 nmp->nm_timeo = NFS_TIMEO;
550 nmp->nm_retry = NFS_RETRANS;
551 nmp->nm_wsize = NFS_WSIZE;
552 nmp->nm_rsize = NFS_RSIZE;
553 nmp->nm_readdirsize = NFS_READDIRSIZE;
554 nmp->nm_numgrps = NFS_MAXGRPS;
555 nmp->nm_readahead = NFS_DEFRAHEAD;
556 nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
557 bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
558 bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN);
560 /* Set up the sockets and per-host congestion */
561 nmp->nm_sotype = argp->sotype;
562 nmp->nm_soproto = argp->proto;
563 nmp->nm_rpcops = &nfs4_rpcops;
565 mp->mnt_stat.f_iosize = PAGE_SIZE;
567 argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
569 nfs_decode_args(nmp, argp);
571 if ((error = nfs4_connect(nmp)))
574 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
576 bpos = mtod(mb, caddr_t);
578 ga.bm = &nfsv4_fsinfobm;
579 nfs_v4initcompound(&cp);
581 /* Get remote path */
585 nfsm_v4build_compound(&cp, "mountnfs()");
586 nfsm_v4build_putrootfh(&cp);
587 for (cp1 = rpth; cp1 && *cp1; cp1 = cp2) {
592 for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++)
595 lkup.namelen = cp2 - cp1;
596 nfsm_v4build_lookup(&cp, &lkup);
599 nfsm_v4build_getfh(&cp, &gfh);
600 nfsm_v4build_getattr(&cp, &ga);
601 nfsm_v4build_finalize(&cp);
603 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred);
607 nfsm_v4dissect_compound(&cp);
608 nfsm_v4dissect_putrootfh(&cp);
610 nfsm_v4dissect_lookup(&cp);
611 nfsm_v4dissect_getfh(&cp, &gfh);
612 nfsm_v4dissect_getattr(&cp, &ga);
614 nfs4_vfsop_fsinfo(&ga.fa, nmp);
615 nmp->nm_state |= NFSSTA_GOTFSINFO;
617 /* Copy root fh into nfsmount. */
618 nmp->nm_fhsize = gfh.fh_len;
619 bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize);
620 nmp->nm_last_renewal = time_second;
622 if ((error = nfs4_do_setclientid(nmp, cred)) != 0)
625 /* Start renewd if it isn't already running */
626 if (nfs4_daemonproc == NULL)
627 kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc,
628 (RFPROC|RFMEM), 0, "nfs4rd");
632 error = nfs_v4postop(&cp, error);
639 uma_zfree(nfsmount_zone, nmp);
646 * unmount system call
649 nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
651 struct nfsmount *nmp;
652 int error, flags = 0;
654 if (mntflags & MNT_FORCE)
658 * Goes something like this..
659 * - Call vflush(, td) to clear out vnodes for this filesystem
661 * - Free up the data structures
663 /* In the forced case, cancel any outstanding requests. */
664 if (flags & FORCECLOSE) {
665 error = nfs_nmcancelreqs(nmp);
671 error = vflush(mp, 0, flags, td);
676 * We are now committed to the unmount.
679 FREE(nmp->nm_nam, M_SONAME);
681 /* XXX there's a race condition here for SMP */
682 wakeup(&nfs4_daemonproc);
684 uma_zfree(nfsmount_zone, nmp);
689 * Return root of a filesystem
692 nfs_root(struct mount *mp, struct vnode **vpp, struct thread *td)
695 struct nfsmount *nmp;
700 error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
704 if (vp->v_type == VNON)
706 vp->v_vflag |= VV_ROOT;
713 * Flush out the buffer cache
717 nfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct thread *td)
719 struct vnode *vp, *nvp;
720 int error, allerror = 0;
723 * Force stale buffer cache information to be flushed.
727 MNT_VNODE_FOREACH(vp, mp, nvp) {
730 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
731 waitfor == MNT_LAZY) {
736 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
739 error = VOP_FSYNC(vp, cred, waitfor, td);
742 VOP_UNLOCK(vp, 0, td);
752 nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
754 struct nfs4_oparg_setclientid scid;
755 struct nfs4_compound cp;
756 struct mbuf *mreq, *mrep = NULL, *md, *mb;
759 char *ipsrc = NULL, uaddr[24], name[24];
761 static unsigned long seq;
764 #ifndef NFS4_USE_RPCCLNT
767 if (nmp->nm_clientid) {
768 printf("nfs4_do_setclientid: already have clientid!\n");
773 /* Try not to re-use clientids */
777 #ifdef NFS4_USE_RPCCLNT
778 scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
780 scid.cb_netid = "tcp";
781 scid.cb_netidlen = 3;
782 scid.cb_prog = 0x1234; /* XXX */
784 /* Do a route lookup to find our source address for talking to this server */
785 bzero(&ro, sizeof ro);
787 #ifdef NFS4_USE_RPCCLNT
788 ro.ro_dst = *nmp->nm_rpcclnt.rc_name;
791 if (ro.ro_rt == NULL) {
792 error = EHOSTUNREACH;
795 ipsrc = inet_ntoa(IA_SIN(ifatoia(ro.ro_rt->rt_ifa))->sin_addr);
796 sprintf(uaddr, "%s.12.48", ipsrc);
797 scid.cb_univaddr = uaddr;
798 scid.cb_univaddrlen = strlen(uaddr);
802 sprintf(name, "%s-%d", ipsrc, (int) ((seq + try) % 1000000L));
803 scid.namelen = strlen(name);
805 nfs_v4initcompound(&cp);
807 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
809 bpos = mtod(mb, caddr_t);
811 nfsm_v4build_compound(&cp, "nfs4_do_setclientid()");
812 nfsm_v4build_setclientid(&cp, &scid);
813 nfsm_v4build_finalize(&cp);
815 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
819 nfsm_v4dissect_compound(&cp);
820 nfsm_v4dissect_setclientid(&cp, &scid);
821 nmp->nm_clientid = scid.clientid;
823 error = nfs_v4postop(&cp, error);
827 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
829 bpos = mtod(mb, caddr_t);
831 nfs_v4initcompound(&cp);
833 nfsm_v4build_compound(&cp, "nfs4_do_setclientid() (confirm)");
834 nfsm_v4build_setclientid_confirm(&cp, &scid);
835 nfsm_v4build_finalize(&cp);
837 nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
841 nfsm_v4dissect_compound(&cp);
842 nfsm_v4dissect_setclientid_confirm(&cp);
845 error = nfs_v4postop(&cp, error);
849 if (error == NFSERR_CLID_INUSE && (++try < NFS4_SETCLIENTID_MAXTRIES))