/* $FreeBSD$ */
/* $Id: nfs_vfsops.c,v 1.38 2003/11/05 14:59:01 rees Exp $ */
/*
* copyright (c) 2003
* the regents of the university of michigan
* all rights reserved
*
* permission is granted to use, copy, create derivative works and redistribute
* this software and such derivative works for any purpose, so long as the name
* of the university of michigan is not used in any advertising or publicity
* pertaining to the use or distribution of this software without specific,
* written prior authorization. if the above copyright notice or any other
* identification of the university of michigan is included in any copy of any
* portion of this software, then the disclaimer below must also be included.
*
* this software is provided as is, without representation from the university
* of michigan as to its fitness for any purpose, and without warranty by the
* university of michigan of any kind, either express or implied, including
* without limitation the implied warranties of merchantability and fitness for
* a particular purpose. the regents of the university of michigan shall not be
* liable for any damages, including special, indirect, incidental, or
* consequential damages, with respect to any claim arising out of or in
* connection with the use of the software, even if it has been or is hereafter
* advised of the possibility of such damages.
*/
/*
* Copyright (c) 1989, 1993, 1995
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_bootp.h"
#include "opt_nfsroot.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/unistd.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/uma.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <rpc/rpcclnt.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfsclient/nfs.h>
#include <nfs4client/nfs4.h>
#include <nfsclient/nfsnode.h>
#include <nfsclient/nfsmount.h>
#include <nfs/xdr_subs.h>
#include <nfsclient/nfsm_subs.h>
#include <nfsclient/nfsdiskless.h>
#include <nfs4client/nfs4m_subs.h>
#include <nfs4client/nfs4_vfs.h>
#include <nfs4client/nfs4_dev.h>
#include <nfs4client/nfs4_idmap.h>
SYSCTL_NODE(_vfs, OID_AUTO, nfs4, CTLFLAG_RW, 0, "NFS4 filesystem");
SYSCTL_STRUCT(_vfs_nfs4, NFS_NFSSTATS, nfsstats, CTLFLAG_RD,
&nfsstats, nfsstats, "S,nfsstats");
static void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp);
static void nfs4_daemon(void *arg);
static int mountnfs(struct nfs_args *, struct mount *,
struct sockaddr *, char *, char *, struct vnode **,
struct ucred *cred);
static int nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred);
static vfs_mount_t nfs_mount;
static vfs_unmount_t nfs_unmount;
static vfs_root_t nfs_root;
static vfs_statfs_t nfs_statfs;
static vfs_sync_t nfs_sync;
/*
* nfs vfs operations.
*/
static struct vfsops nfs_vfsops = {
.vfs_init = nfs4_init,
.vfs_mount = nfs_mount,
.vfs_root = nfs_root,
.vfs_statfs = nfs_statfs,
.vfs_sync = nfs_sync,
.vfs_uninit = nfs4_uninit,
.vfs_unmount = nfs_unmount,
};
VFS_SET(nfs_vfsops, nfs4, VFCF_NETWORK);
static struct nfs_rpcops nfs4_rpcops = {
nfs4_readrpc,
nfs4_writerpc,
nfs4_writebp,
nfs4_readlinkrpc,
nfs4_invaldir,
nfs4_commit,
};
/* So that loader and kldload(2) can find us, wherever we are.. */
MODULE_VERSION(nfs4, 1);
void nfsargs_ntoh(struct nfs_args *);
int
nfs4_init(struct vfsconf *vfsp)
{
rpcclnt_init();
nfs4dev_init();
idmap_init();
nfsm_v4init();
return (0);
}
int
nfs4_uninit(struct vfsconf *vfsp)
{
rpcclnt_uninit();
nfs4dev_uninit();
idmap_uninit();
return (0);
}
/*
* nfs statfs call
*/
static int
nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
{
struct vnode *vp;
struct nfs_statfs *sfp;
caddr_t bpos, dpos;
struct nfsmount *nmp = VFSTONFS(mp);
int error = 0;
struct mbuf *mreq, *mrep = NULL, *md, *mb;
struct nfsnode *np;
struct nfs4_compound cp;
struct nfs4_oparg_getattr ga;
struct nfsv4_fattr *fap = &ga.fa;
#ifndef nolint
sfp = NULL;
#endif
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
if (error)
return (error);
vp = NFSTOV(np);
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1));
mb = mreq;
bpos = mtod(mb, caddr_t);
ga.bm = &nfsv4_fsattrbm;
nfs_v4initcompound(&cp);
nfsm_v4build_compound(&cp, "statfs()");
nfsm_v4build_putfh(&cp, vp);
nfsm_v4build_getattr(&cp, &ga);
nfsm_v4build_finalize(&cp);
nfsm_request(vp, NFSV4PROC_COMPOUND, td, td->td_ucred);
if (error != 0)
goto nfsmout;
nfsm_v4dissect_compound(&cp);
nfsm_v4dissect_putfh(&cp);
nfsm_v4dissect_getattr(&cp, &ga);
nfs4_vfsop_statfs(fap, sbp, mp);
nfsmout:
error = nfs_v4postop(&cp, error);
vput(vp);
if (mrep != NULL)
m_freem(mrep);
return (error);
}
static void
nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
{
int s;
int adjsock;
int maxio;
s = splnet();
/*
* Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
* no sense in that context.
*/
if (argp->sotype == SOCK_STREAM)
nmp->nm_flag &= ~NFSMNT_NOCONN;
nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
/* Re-bind if rsrvd port requested and wasn't on one */
adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
&& (argp->flags & NFSMNT_RESVPORT);
/* Also re-bind if we're switching to/from a connected UDP socket */
adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
(argp->flags & NFSMNT_NOCONN));
/* Update flags atomically. Don't change the lock bits. */
nmp->nm_flag = argp->flags | nmp->nm_flag;
splx(s);
if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
if (nmp->nm_timeo < NFS_MINTIMEO)
nmp->nm_timeo = NFS_MINTIMEO;
else if (nmp->nm_timeo > NFS_MAXTIMEO)
nmp->nm_timeo = NFS_MAXTIMEO;
}
if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
nmp->nm_retry = argp->retrans;
if (nmp->nm_retry > NFS_MAXREXMIT)
nmp->nm_retry = NFS_MAXREXMIT;
}
if (argp->flags & NFSMNT_NFSV3) {
if (argp->sotype == SOCK_DGRAM)
maxio = NFS_MAXDGRAMDATA;
else
maxio = NFS_MAXDATA;
} else
maxio = NFS_V2MAXDATA;
if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
nmp->nm_wsize = argp->wsize;
/* Round down to multiple of blocksize */
nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
if (nmp->nm_wsize <= 0)
nmp->nm_wsize = NFS_FABLKSIZE;
}
if (nmp->nm_wsize > maxio)
nmp->nm_wsize = maxio;
if (nmp->nm_wsize > MAXBSIZE)
nmp->nm_wsize = MAXBSIZE;
if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
nmp->nm_rsize = argp->rsize;
/* Round down to multiple of blocksize */
nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
if (nmp->nm_rsize <= 0)
nmp->nm_rsize = NFS_FABLKSIZE;
}
if (nmp->nm_rsize > maxio)
nmp->nm_rsize = maxio;
if (nmp->nm_rsize > MAXBSIZE)
nmp->nm_rsize = MAXBSIZE;
if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
nmp->nm_readdirsize = argp->readdirsize;
}
if (nmp->nm_readdirsize > maxio)
nmp->nm_readdirsize = maxio;
if (nmp->nm_readdirsize > nmp->nm_rsize)
nmp->nm_readdirsize = nmp->nm_rsize;
if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
nmp->nm_acregmin = argp->acregmin;
else
nmp->nm_acregmin = NFS_MINATTRTIMO;
if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
nmp->nm_acregmax = argp->acregmax;
else
nmp->nm_acregmax = NFS_MAXATTRTIMO;
if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
nmp->nm_acdirmin = argp->acdirmin;
else
nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
nmp->nm_acdirmax = argp->acdirmax;
else
nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
if (nmp->nm_acdirmin > nmp->nm_acdirmax)
nmp->nm_acdirmin = nmp->nm_acdirmax;
if (nmp->nm_acregmin > nmp->nm_acregmax)
nmp->nm_acregmin = nmp->nm_acregmax;
if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
if (argp->maxgrouplist <= NFS_MAXGRPS)
nmp->nm_numgrps = argp->maxgrouplist;
else
nmp->nm_numgrps = NFS_MAXGRPS;
}
if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
if (argp->readahead <= NFS_MAXRAHEAD)
nmp->nm_readahead = argp->readahead;
else
nmp->nm_readahead = NFS_MAXRAHEAD;
}
if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
if (argp->deadthresh <= NFS_MAXDEADTHRESH)
nmp->nm_deadthresh = argp->deadthresh;
else
nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
}
adjsock |= ((nmp->nm_sotype != argp->sotype) ||
(nmp->nm_soproto != argp->proto));
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
if (nmp->nm_rpcclnt.rc_so && adjsock) {
nfs_safedisconnect(nmp);
if (nmp->nm_sotype == SOCK_DGRAM) {
while (nfs4_connect(nmp)) {
printf("nfs_args: retrying connect\n");
(void) tsleep((caddr_t)&lbolt,
PSOCK, "nfscon", 0);
}
}
}
}
/*
* VFS Operations.
*
* mount system call
* It seems a bit dumb to copyinstr() the host and path here and then
* bcopy() them in mountnfs(), but I wanted to detect errors before
* doing the sockargs() call because sockargs() allocates an mbuf and
* an error after that means that I have to release the mbuf.
*/
/* ARGSUSED */
static int
nfs_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp,
struct thread *td)
{
int error;
struct nfs_args args;
struct sockaddr *nam;
struct vnode *vp;
char hst[MNAMELEN];
size_t len;
if (path == NULL) {
printf("NFSv4: nfs_mountroot not supported\n");
return EINVAL;
}
error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args));
if (error)
return (error);
if (args.version != NFS_ARGSVERSION)
return (EPROGMISMATCH);
if (mp->mnt_flag & MNT_UPDATE) {
struct nfsmount *nmp = VFSTONFS(mp);
if (nmp == NULL)
return (EIO);
/*
* When doing an update, we can't change from or to
* v3, switch lockd strategies or change cookie translation
*/
args.flags = (args.flags &
~(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD)) |
(nmp->nm_flag &
(NFSMNT_NFSV3 | NFSMNT_NFSV4 | NFSMNT_NOLOCKD));
nfs_decode_args(nmp, &args);
return (0);
}
if (error)
return (error);
error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
if (error)
return (error);
bzero(&hst[len], MNAMELEN - len);
/* sockargs() call must be after above copyin() calls */
error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen);
if (error)
return (error);
error = mountnfs(&args, mp, nam, path, hst, &vp, td->td_ucred);
return (error);
}
/*
* renew should be done async
* should re-scan mount queue each time
*/
struct proc *nfs4_daemonproc;
static int
nfs4_do_renew(struct nfsmount *nmp, struct ucred *cred)
{
struct nfs4_compound cp;
struct mbuf *mreq, *mrep = NULL, *md, *mb;
caddr_t bpos, dpos;
int error;
mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, sizeof(uint64_t));
mb = mreq;
bpos = mtod(mb, caddr_t);
nfs_v4initcompound(&cp);
nfsm_v4build_compound(&cp, "nfs4_do_renew()");
nfsm_v4build_renew(&cp, nmp->nm_clientid);
nfsm_v4build_finalize(&cp);
nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
if (error != 0)
goto nfsmout;
nfsm_v4dissect_compound(&cp);
nfsm_v4dissect_renew(&cp);
nmp->nm_last_renewal = time_second;
return (0);
nfsmout:
error = nfs_v4postop(&cp, error);
/* XXX */
if (mrep != NULL)
m_freem(mrep);
return (error);
}
static void
nfs4_daemon(void *arg)
{
struct mount *mp;
struct nfsmount *nmp;
int nmounts;
while (1) {
nmounts = 0;
mtx_lock(&mountlist_mtx);
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
if (strcmp(mp->mnt_vfc->vfc_name, "nfs4") != 0)
continue;
nmounts++;
nmp = VFSTONFS(mp);
if (time_second < nmp->nm_last_renewal + nmp->nm_lease_time - 4)
continue;
mtx_unlock(&mountlist_mtx);
mtx_lock(&Giant);
nfs4_do_renew(nmp, (struct ucred *) arg);
mtx_unlock(&Giant);
mtx_lock(&mountlist_mtx);
}
mtx_unlock(&mountlist_mtx);
/* Must kill the daemon here, or module unload will cause a panic */
if (nmounts == 0) {
mtx_lock(&Giant);
nfs4_daemonproc = NULL;
mtx_unlock(&Giant);
printf("nfsv4 renewd exiting\n");
kthread_exit(0);
}
tsleep(&nfs4_daemonproc, PVFS, "nfs4", 2 * hz);
}
}
/*
* Common code for mount and mountroot
*/
static int
mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
char *pth, char *hst, struct vnode **vpp, struct ucred *cred)
{
struct nfsmount *nmp;
char *rpth, *cp1, *cp2;
int nlkup = 0, error;
struct nfs4_compound cp;
struct mbuf *mreq, *mrep = NULL, *md, *mb;
caddr_t bpos, dpos;
struct nfs4_oparg_lookup lkup;
struct nfs4_oparg_getfh gfh;
struct nfs4_oparg_getattr ga;
struct thread *td = curthread; /* XXX */
if (mp->mnt_flag & MNT_UPDATE) {
nmp = VFSTONFS(mp);
/* update paths, file handles, etc, here XXX */
FREE(nam, M_SONAME);
return (0);
} else {
nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
bzero((caddr_t)nmp, sizeof (struct nfsmount));
TAILQ_INIT(&nmp->nm_bufq);
mp->mnt_data = (qaddr_t)nmp;
}
vfs_getnewfsid(mp);
nmp->nm_mountp = mp;
nmp->nm_maxfilesize = 0xffffffffLL;
nmp->nm_timeo = NFS_TIMEO;
nmp->nm_retry = NFS_RETRANS;
nmp->nm_wsize = NFS_WSIZE;
nmp->nm_rsize = NFS_RSIZE;
nmp->nm_readdirsize = NFS_READDIRSIZE;
nmp->nm_numgrps = NFS_MAXGRPS;
nmp->nm_readahead = NFS_DEFRAHEAD;
nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN);
nmp->nm_nam = nam;
/* Set up the sockets and per-host congestion */
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
nmp->nm_rpcops = &nfs4_rpcops;
/* XXX */
mp->mnt_stat.f_iosize = PAGE_SIZE;
argp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
nfs_decode_args(nmp, argp);
if ((error = nfs4_connect(nmp)))
goto bad;
mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
mb = mreq;
bpos = mtod(mb, caddr_t);
ga.bm = &nfsv4_fsinfobm;
nfs_v4initcompound(&cp);
/* Get remote path */
rpth = hst;
strsep(&rpth, ":");
nfsm_v4build_compound(&cp, "mountnfs()");
nfsm_v4build_putrootfh(&cp);
for (cp1 = rpth; cp1 && *cp1; cp1 = cp2) {
while (*cp1 == '/')
cp1++;
if (!*cp1)
break;
for (cp2 = cp1; *cp2 && *cp2 != '/'; cp2++)
;
lkup.name = cp1;
lkup.namelen = cp2 - cp1;
nfsm_v4build_lookup(&cp, &lkup);
nlkup++;
}
nfsm_v4build_getfh(&cp, &gfh);
nfsm_v4build_getattr(&cp, &ga);
nfsm_v4build_finalize(&cp);
nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, td, cred);
if (error != 0)
goto nfsmout;
nfsm_v4dissect_compound(&cp);
nfsm_v4dissect_putrootfh(&cp);
while (nlkup--)
nfsm_v4dissect_lookup(&cp);
nfsm_v4dissect_getfh(&cp, &gfh);
nfsm_v4dissect_getattr(&cp, &ga);
nfs4_vfsop_fsinfo(&ga.fa, nmp);
nmp->nm_state |= NFSSTA_GOTFSINFO;
/* Copy root fh into nfsmount. */
nmp->nm_fhsize = gfh.fh_len;
bcopy(&gfh.fh_val, nmp->nm_fh, nmp->nm_fhsize);
nmp->nm_last_renewal = time_second;
if ((error = nfs4_do_setclientid(nmp, cred)) != 0)
goto nfsmout;
/* Start renewd if it isn't already running */
if (nfs4_daemonproc == NULL)
kthread_create(nfs4_daemon, crdup(cred), &nfs4_daemonproc,
(RFPROC|RFMEM), 0, "nfs4rd");
return (0);
nfsmout:
error = nfs_v4postop(&cp, error);
/* XXX */
if (mrep != NULL)
m_freem(mrep);
bad:
nfs_disconnect(nmp);
uma_zfree(nfsmount_zone, nmp);
FREE(nam, M_SONAME);
return (error);
}
/*
* unmount system call
*/
static int
nfs_unmount(struct mount *mp, int mntflags, struct thread *td)
{
struct nfsmount *nmp;
int error, flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
nmp = VFSTONFS(mp);
/*
* Goes something like this..
* - Call vflush() to clear out vnodes for this filesystem
* - Close the socket
* - Free up the data structures
*/
/* In the forced case, cancel any outstanding requests. */
if (flags & FORCECLOSE) {
error = nfs_nmcancelreqs(nmp);
if (error)
return (error);
nfs4dev_purge();
}
error = vflush(mp, 0, flags);
if (error)
return (error);
/*
* We are now committed to the unmount.
*/
nfs_disconnect(nmp);
FREE(nmp->nm_nam, M_SONAME);
/* XXX there's a race condition here for SMP */
wakeup(&nfs4_daemonproc);
uma_zfree(nfsmount_zone, nmp);
return (0);
}
/*
* Return root of a filesystem
*/
static int
nfs_root(struct mount *mp, struct vnode **vpp)
{
struct vnode *vp;
struct nfsmount *nmp;
struct nfsnode *np;
int error;
nmp = VFSTONFS(mp);
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np);
if (error)
return (error);
vp = NFSTOV(np);
if (vp->v_type == VNON)
vp->v_type = VDIR;
vp->v_vflag |= VV_ROOT;
*vpp = vp;
return (0);
}
/*
* Flush out the buffer cache
*/
/* ARGSUSED */
static int
nfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct thread *td)
{
struct vnode *vp, *vnp;
int error, allerror = 0;
/*
* Force stale buffer cache information to be flushed.
*/
MNT_ILOCK(mp);
loop:
for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist);
vp != NULL;
vp = vnp) {
/*
* If the vnode that we are about to sync is no longer
* associated with this mount point, start over.
*/
if (vp->v_mount != mp)
goto loop;
vnp = TAILQ_NEXT(vp, v_nmntvnodes);
VI_LOCK(vp);
MNT_IUNLOCK(mp);
if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
waitfor == MNT_LAZY) {
VI_UNLOCK(vp);
MNT_ILOCK(mp);
continue;
}
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
goto loop;
}
error = VOP_FSYNC(vp, cred, waitfor, td);
if (error)
allerror = error;
VOP_UNLOCK(vp, 0, td);
vrele(vp);
MNT_ILOCK(mp);
}
MNT_IUNLOCK(mp);
return (allerror);
}
static int
nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
{
struct nfs4_oparg_setclientid scid;
struct nfs4_compound cp;
struct mbuf *mreq, *mrep = NULL, *md, *mb;
caddr_t bpos, dpos;
struct route ro;
char *ipsrc = NULL, uaddr[24], name[24];
int try = 0;
static unsigned long seq;
int error;
#ifndef NFS4_USE_RPCCLNT
return (0);
#endif
if (nmp->nm_clientid) {
printf("nfs4_do_setclientid: already have clientid!\n");
error = 0;
goto nfsmout;
}
/* Try not to re-use clientids */
if (seq == 0)
seq = time_second;
#ifdef NFS4_USE_RPCCLNT
scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
#endif
scid.cb_netid = "tcp";
scid.cb_netidlen = 3;
scid.cb_prog = 0x1234; /* XXX */
/* Do a route lookup to find our source address for talking to this server */
bzero(&ro, sizeof ro);
#ifdef NFS4_USE_RPCCLNT
ro.ro_dst = *nmp->nm_rpcclnt.rc_name;
#endif
rtalloc(&ro);
if (ro.ro_rt == NULL) {
error = EHOSTUNREACH;
goto nfsmout;
}
ipsrc = inet_ntoa(IA_SIN(ifatoia(ro.ro_rt->rt_ifa))->sin_addr);
sprintf(uaddr, "%s.12.48", ipsrc);
scid.cb_univaddr = uaddr;
scid.cb_univaddrlen = strlen(uaddr);
RTFREE(ro.ro_rt);
try_again:
sprintf(name, "%s-%d", ipsrc, (int) ((seq + try) % 1000000L));
scid.namelen = strlen(name);
scid.name = name;
nfs_v4initcompound(&cp);
mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
mb = mreq;
bpos = mtod(mb, caddr_t);
nfsm_v4build_compound(&cp, "nfs4_do_setclientid()");
nfsm_v4build_setclientid(&cp, &scid);
nfsm_v4build_finalize(&cp);
nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
if (error != 0)
goto nfsmout;
nfsm_v4dissect_compound(&cp);
nfsm_v4dissect_setclientid(&cp, &scid);
nmp->nm_clientid = scid.clientid;
error = nfs_v4postop(&cp, error);
/* Confirm */
m_freem(mrep);
mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, NFSX_FH(1));
mb = mreq;
bpos = mtod(mb, caddr_t);
nfs_v4initcompound(&cp);
nfsm_v4build_compound(&cp, "nfs4_do_setclientid() (confirm)");
nfsm_v4build_setclientid_confirm(&cp, &scid);
nfsm_v4build_finalize(&cp);
nfsm_request_mnt(nmp, NFSV4PROC_COMPOUND, curthread, cred);
if (error != 0)
goto nfsmout;
nfsm_v4dissect_compound(&cp);
nfsm_v4dissect_setclientid_confirm(&cp);
nfsmout:
error = nfs_v4postop(&cp, error);
if (mrep)
m_freem(mrep);
if (error == NFSERR_CLID_INUSE && (++try < NFS4_SETCLIENTID_MAXTRIES))
goto try_again;
return (error);
}
