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freebsd-skq/sys/fs/nfsclient/nfs_clvfsops.c
rmacklem dcc7a6b868 Fix two bugs in the experimental nfs client: 
- When the root vnode was acquired during mounting, mnt_stat.f_iosize was
  still set to 0, so getnewvnode() would set bo_bsize == 0. This would
  confuse getblk(), so that it always returned the first block causing
  the problem when the root directory of the mount point was greater
  than one block in size. It was fixed by setting mnt_stat.f_iosize to
  NFS_DIRBLKSIZ before calling ncl_nget() to acquire the root vnode.
- NFSMNT_INT was being set temporarily while the initial connect to a
  server was being done. This erroneously configured the krpc for
  interruptible RPCs, which caused problems because signals weren't
  being masked off as they would have been for interruptible mounts.
  This code was deleted to fix the problem. Since mount_nfs does an
  NFS null RPC before the mount system call, connections to the server
  should work ok.

Tested by:	swell dot k at gmail dot com
Approved by:	re (kensmith), kib (mentor)
2009-07-19 16:44:26 +00:00

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/*-
* 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.
* 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.
*
* from 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/bio.h>
#include <sys/buf.h>
#include <sys/clock.h>
#include <sys/jail.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/vnode.h>
#include <sys/signalvar.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 <fs/nfs/nfsport.h>
#include <fs/nfsclient/nfsnode.h>
#include <fs/nfsclient/nfsmount.h>
#include <fs/nfsclient/nfs.h>
#include <fs/nfsclient/nfsdiskless.h>
extern int nfscl_ticks;
extern struct timeval nfsboottime;
extern struct nfsstats newnfsstats;
MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "New NFS request header");
MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "New NFS mount struct");
SYSCTL_DECL(_vfs_newnfs);
SYSCTL_STRUCT(_vfs_newnfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RW,
&newnfsstats, nfsstats, "S,nfsstats");
static int nfs_ip_paranoia = 1;
SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
&nfs_ip_paranoia, 0, "");
static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY;
SYSCTL_INT(_vfs_newnfs, NFS_TPRINTF_INITIAL_DELAY,
downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, "");
/* how long between console messages "nfs server foo not responding" */
static int nfs_tprintf_delay = NFS_TPRINTF_DELAY;
SYSCTL_INT(_vfs_newnfs, NFS_TPRINTF_DELAY,
downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, "");
static void nfs_sec_name(char *, int *);
static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp,
struct nfs_args *argp, struct ucred *, struct thread *);
static int mountnfs(struct nfs_args *, struct mount *,
struct sockaddr *, char *, u_char *, u_char *, u_char *,
struct vnode **, struct ucred *, struct thread *);
static vfs_mount_t nfs_mount;
static vfs_cmount_t nfs_cmount;
static vfs_unmount_t nfs_unmount;
static vfs_root_t nfs_root;
static vfs_statfs_t nfs_statfs;
static vfs_sync_t nfs_sync;
static vfs_sysctl_t nfs_sysctl;
/*
* nfs vfs operations.
*/
static struct vfsops nfs_vfsops = {
.vfs_init = ncl_init,
.vfs_mount = nfs_mount,
.vfs_cmount = nfs_cmount,
.vfs_root = nfs_root,
.vfs_statfs = nfs_statfs,
.vfs_sync = nfs_sync,
.vfs_uninit = ncl_uninit,
.vfs_unmount = nfs_unmount,
.vfs_sysctl = nfs_sysctl,
};
VFS_SET(nfs_vfsops, newnfs, VFCF_NETWORK);
/* So that loader and kldload(2) can find us, wherever we are.. */
MODULE_VERSION(newnfs, 1);
/*
* This structure must be filled in by a primary bootstrap or bootstrap
* server for a diskless/dataless machine. It is initialized below just
* to ensure that it is allocated to initialized data (.data not .bss).
*/
struct nfs_diskless newnfs_diskless = { { { 0 } } };
struct nfsv3_diskless newnfsv3_diskless = { { { 0 } } };
int newnfs_diskless_valid = 0;
SYSCTL_INT(_vfs_newnfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
&newnfs_diskless_valid, 0,
"Has the diskless struct been filled correctly");
SYSCTL_STRING(_vfs_newnfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
newnfsv3_diskless.root_hostnam, 0, "Path to nfs root");
SYSCTL_OPAQUE(_vfs_newnfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
&newnfsv3_diskless.root_saddr, sizeof newnfsv3_diskless.root_saddr,
"%Ssockaddr_in", "Diskless root nfs address");
void newnfsargs_ntoh(struct nfs_args *);
static int nfs_mountdiskless(char *,
struct sockaddr_in *, struct nfs_args *,
struct thread *, struct vnode **, struct mount *);
static void nfs_convert_diskless(void);
static void nfs_convert_oargs(struct nfs_args *args,
struct onfs_args *oargs);
int
newnfs_iosize(struct nfsmount *nmp)
{
int iosize, maxio;
/* First, set the upper limit for iosize */
if (nmp->nm_flag & NFSMNT_NFSV4) {
maxio = NFS_MAXBSIZE;
} else if (nmp->nm_flag & NFSMNT_NFSV3) {
if (nmp->nm_sotype == SOCK_DGRAM)
maxio = NFS_MAXDGRAMDATA;
else
maxio = NFS_MAXBSIZE;
} else {
maxio = NFS_V2MAXDATA;
}
if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0)
nmp->nm_rsize = maxio;
if (nmp->nm_rsize > MAXBSIZE)
nmp->nm_rsize = MAXBSIZE;
if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0)
nmp->nm_readdirsize = maxio;
if (nmp->nm_readdirsize > nmp->nm_rsize)
nmp->nm_readdirsize = nmp->nm_rsize;
if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0)
nmp->nm_wsize = maxio;
if (nmp->nm_wsize > MAXBSIZE)
nmp->nm_wsize = MAXBSIZE;
/*
* Calculate the size used for io buffers. Use the larger
* of the two sizes to minimise nfs requests but make sure
* that it is at least one VM page to avoid wasting buffer
* space.
*/
iosize = imax(nmp->nm_rsize, nmp->nm_wsize);
iosize = imax(iosize, PAGE_SIZE);
nmp->nm_mountp->mnt_stat.f_iosize = iosize;
return (iosize);
}
static void
nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs)
{
args->version = NFS_ARGSVERSION;
args->addr = oargs->addr;
args->addrlen = oargs->addrlen;
args->sotype = oargs->sotype;
args->proto = oargs->proto;
args->fh = oargs->fh;
args->fhsize = oargs->fhsize;
args->flags = oargs->flags;
args->wsize = oargs->wsize;
args->rsize = oargs->rsize;
args->readdirsize = oargs->readdirsize;
args->timeo = oargs->timeo;
args->retrans = oargs->retrans;
args->readahead = oargs->readahead;
args->hostname = oargs->hostname;
}
static void
nfs_convert_diskless(void)
{
bcopy(&newnfs_diskless.myif, &newnfsv3_diskless.myif,
sizeof (struct ifaliasreq));
bcopy(&newnfs_diskless.mygateway, &newnfsv3_diskless.mygateway,
sizeof (struct sockaddr_in));
nfs_convert_oargs(&newnfsv3_diskless.root_args,
&newnfs_diskless.root_args);
if (newnfsv3_diskless.root_args.flags & NFSMNT_NFSV3) {
newnfsv3_diskless.root_fhsize = NFSX_MYFH;
bcopy(newnfs_diskless.root_fh, newnfsv3_diskless.root_fh,
NFSX_MYFH);
} else {
newnfsv3_diskless.root_fhsize = NFSX_V2FH;
bcopy(newnfs_diskless.root_fh, newnfsv3_diskless.root_fh,
NFSX_V2FH);
}
bcopy(&newnfs_diskless.root_saddr,&newnfsv3_diskless.root_saddr,
sizeof(struct sockaddr_in));
bcopy(newnfs_diskless.root_hostnam, newnfsv3_diskless.root_hostnam,
MNAMELEN);
newnfsv3_diskless.root_time = newnfs_diskless.root_time;
bcopy(newnfs_diskless.my_hostnam, newnfsv3_diskless.my_hostnam,
MAXHOSTNAMELEN);
newnfs_diskless_valid = 3;
}
/*
* nfs statfs call
*/
static int
nfs_statfs(struct mount *mp, struct statfs *sbp)
{
struct vnode *vp;
struct thread *td;
struct nfsmount *nmp = VFSTONFS(mp);
struct nfsvattr nfsva;
struct nfsfsinfo fs;
struct nfsstatfs sb;
int error = 0, attrflag, gotfsinfo = 0, ret;
struct nfsnode *np;
td = curthread;
error = vfs_busy(mp, MBF_NOWAIT);
if (error)
return (error);
error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np);
if (error) {
vfs_unbusy(mp);
return (error);
}
vp = NFSTOV(np);
mtx_lock(&nmp->nm_mtx);
if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) {
mtx_unlock(&nmp->nm_mtx);
error = nfsrpc_fsinfo(vp, &fs, td->td_ucred, td, &nfsva,
&attrflag, NULL);
if (!error)
gotfsinfo = 1;
} else
mtx_unlock(&nmp->nm_mtx);
if (!error)
error = nfsrpc_statfs(vp, &sb, &fs, td->td_ucred, td, &nfsva,
&attrflag, NULL);
if (attrflag == 0) {
ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1,
td->td_ucred, td, &nfsva, NULL);
if (ret) {
/*
* Just set default values to get things going.
*/
NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr));
nfsva.na_vattr.va_type = VDIR;
nfsva.na_vattr.va_mode = 0777;
nfsva.na_vattr.va_nlink = 100;
nfsva.na_vattr.va_uid = (uid_t)0;
nfsva.na_vattr.va_gid = (gid_t)0;
nfsva.na_vattr.va_fileid = 2;
nfsva.na_vattr.va_gen = 1;
nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE;
nfsva.na_vattr.va_size = 512 * 1024;
}
}
(void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
if (!error) {
mtx_lock(&nmp->nm_mtx);
if (gotfsinfo || (nmp->nm_flag & NFSMNT_NFSV4))
nfscl_loadfsinfo(nmp, &fs);
nfscl_loadsbinfo(nmp, &sb, sbp);
sbp->f_flags = nmp->nm_flag;
sbp->f_iosize = newnfs_iosize(nmp);
mtx_unlock(&nmp->nm_mtx);
if (sbp != &mp->mnt_stat) {
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
}
strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN);
} else if (NFS_ISV4(vp)) {
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
}
vput(vp);
vfs_unbusy(mp);
return (error);
}
/*
* nfs version 3 fsinfo rpc call
*/
int
ncl_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred,
struct thread *td)
{
struct nfsfsinfo fs;
struct nfsvattr nfsva;
int error, attrflag;
error = nfsrpc_fsinfo(vp, &fs, cred, td, &nfsva, &attrflag, NULL);
if (!error) {
if (attrflag)
(void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1);
mtx_lock(&nmp->nm_mtx);
nfscl_loadfsinfo(nmp, &fs);
mtx_unlock(&nmp->nm_mtx);
}
return (error);
}
/*
* Mount a remote root fs via. nfs. This depends on the info in the
* newnfs_diskless structure that has been filled in properly by some primary
* bootstrap.
* It goes something like this:
* - do enough of "ifconfig" by calling ifioctl() so that the system
* can talk to the server
* - If newnfs_diskless.mygateway is filled in, use that address as
* a default gateway.
* - build the rootfs mount point and call mountnfs() to do the rest.
*
* It is assumed to be safe to read, modify, and write the nfsv3_diskless
* structure, as well as other global NFS client variables here, as
* nfs_mountroot() will be called once in the boot before any other NFS
* client activity occurs.
*/
int
ncl_mountroot(struct mount *mp)
{
struct thread *td = curthread;
struct nfsv3_diskless *nd = &newnfsv3_diskless;
struct socket *so;
struct vnode *vp;
struct ifreq ir;
int error;
u_long l;
char buf[128];
char *cp;
#if defined(BOOTP_NFSROOT) && defined(BOOTP)
bootpc_init(); /* use bootp to get nfs_diskless filled in */
#elif defined(NFS_ROOT)
nfs_setup_diskless();
#endif
if (newnfs_diskless_valid == 0)
return (-1);
if (newnfs_diskless_valid == 1)
nfs_convert_diskless();
/*
* XXX splnet, so networks will receive...
*/
splnet();
/*
* Do enough of ifconfig(8) so that the critical net interface can
* talk to the server.
*/
error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0,
td->td_ucred, td);
if (error)
panic("nfs_mountroot: socreate(%04x): %d",
nd->myif.ifra_addr.sa_family, error);
#if 0 /* XXX Bad idea */
/*
* We might not have been told the right interface, so we pass
* over the first ten interfaces of the same kind, until we get
* one of them configured.
*/
for (i = strlen(nd->myif.ifra_name) - 1;
nd->myif.ifra_name[i] >= '0' &&
nd->myif.ifra_name[i] <= '9';
nd->myif.ifra_name[i] ++) {
error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
if(!error)
break;
}
#endif
error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
if (error)
panic("nfs_mountroot: SIOCAIFADDR: %d", error);
if ((cp = getenv("boot.netif.mtu")) != NULL) {
ir.ifr_mtu = strtol(cp, NULL, 10);
bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ);
freeenv(cp);
error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td);
if (error)
printf("nfs_mountroot: SIOCSIFMTU: %d", error);
}
soclose(so);
/*
* If the gateway field is filled in, set it as the default route.
* Note that pxeboot will set a default route of 0 if the route
* is not set by the DHCP server. Check also for a value of 0
* to avoid panicking inappropriately in that situation.
*/
if (nd->mygateway.sin_len != 0 &&
nd->mygateway.sin_addr.s_addr != 0) {
struct sockaddr_in mask, sin;
bzero((caddr_t)&mask, sizeof(mask));
sin = mask;
sin.sin_family = AF_INET;
sin.sin_len = sizeof(sin);
/* XXX MRT use table 0 for this sort of thing */
error = rtrequest(RTM_ADD, (struct sockaddr *)&sin,
(struct sockaddr *)&nd->mygateway,
(struct sockaddr *)&mask,
RTF_UP | RTF_GATEWAY, NULL);
if (error)
panic("nfs_mountroot: RTM_ADD: %d", error);
}
/*
* Create the rootfs mount point.
*/
nd->root_args.fh = nd->root_fh;
nd->root_args.fhsize = nd->root_fhsize;
l = ntohl(nd->root_saddr.sin_addr.s_addr);
snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
(l >> 24) & 0xff, (l >> 16) & 0xff,
(l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam);
printf("NFS ROOT: %s\n", buf);
nd->root_args.hostname = buf;
if ((error = nfs_mountdiskless(buf,
&nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) {
return (error);
}
/*
* This is not really an nfs issue, but it is much easier to
* set hostname here and then let the "/etc/rc.xxx" files
* mount the right /var based upon its preset value.
*/
mtx_lock(&prison0.pr_mtx);
strlcpy(prison0.pr_hostname, nd->my_hostnam,
sizeof(prison0.pr_hostname));
mtx_unlock(&prison0.pr_mtx);
inittodr(ntohl(nd->root_time));
return (0);
}
/*
* Internal version of mount system call for diskless setup.
*/
static int
nfs_mountdiskless(char *path,
struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
struct vnode **vpp, struct mount *mp)
{
struct sockaddr *nam;
int error;
nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK);
if ((error = mountnfs(args, mp, nam, path, NULL, NULL, NULL, vpp,
td->td_ucred, td)) != 0) {
printf("nfs_mountroot: mount %s on /: %d\n", path, error);
return (error);
}
return (0);
}
static void
nfs_sec_name(char *sec, int *flagsp)
{
if (!strcmp(sec, "krb5"))
*flagsp |= NFSMNT_KERB;
else if (!strcmp(sec, "krb5i"))
*flagsp |= (NFSMNT_KERB | NFSMNT_INTEGRITY);
else if (!strcmp(sec, "krb5p"))
*flagsp |= (NFSMNT_KERB | NFSMNT_PRIVACY);
}
static void
nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp,
struct ucred *cred, struct thread *td)
{
int s;
int adjsock;
s = splnet();
/*
* Set read-only flag if requested; otherwise, clear it if this is
* an update. If this is not an update, then either the read-only
* flag is already clear, or this is a root mount and it was set
* intentionally at some previous point.
*/
if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) {
MNT_ILOCK(mp);
mp->mnt_flag |= MNT_RDONLY;
MNT_IUNLOCK(mp);
} else if (mp->mnt_flag & MNT_UPDATE) {
MNT_ILOCK(mp);
mp->mnt_flag &= ~MNT_RDONLY;
MNT_IUNLOCK(mp);
}
/*
* Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
* no sense in that context. Also, set up appropriate retransmit
* and soft timeout behavior.
*/
if (argp->sotype == SOCK_STREAM) {
nmp->nm_flag &= ~NFSMNT_NOCONN;
nmp->nm_timeo = NFS_MAXTIMEO;
}
/* Also clear RDIRPLUS if not NFSv3, it crashes some servers */
if ((argp->flags & NFSMNT_NFSV3) == 0)
nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
/* 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_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 ((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 ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
nmp->nm_readdirsize = argp->readdirsize;
}
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_READAHEAD) && argp->readahead >= 0) {
if (argp->readahead <= NFS_MAXRAHEAD)
nmp->nm_readahead = argp->readahead;
else
nmp->nm_readahead = NFS_MAXRAHEAD;
}
if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) {
if (argp->wcommitsize < nmp->nm_wsize)
nmp->nm_wcommitsize = nmp->nm_wsize;
else
nmp->nm_wcommitsize = argp->wcommitsize;
}
adjsock |= ((nmp->nm_sotype != argp->sotype) ||
(nmp->nm_soproto != argp->proto));
if (nmp->nm_client != NULL && adjsock) {
int haslock = 0, error = 0;
if (nmp->nm_sotype == SOCK_STREAM) {
error = newnfs_sndlock(&nmp->nm_sockreq.nr_lock);
if (!error)
haslock = 1;
}
if (!error) {
newnfs_disconnect(&nmp->nm_sockreq);
if (haslock)
newnfs_sndunlock(&nmp->nm_sockreq.nr_lock);
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
if (nmp->nm_sotype == SOCK_DGRAM)
while (newnfs_connect(nmp, &nmp->nm_sockreq,
cred, td, 0)) {
printf("newnfs_args: retrying connect\n");
(void) nfs_catnap(PSOCK, "newnfscon");
}
}
} else {
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
}
}
static const char *nfs_opts[] = { "from",
"noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union",
"noclusterr", "noclusterw", "multilabel", "acls", "force", "update",
"async", "noconn", "nolockd", "conn", "lockd", "intr", "rdirplus",
"readdirsize", "soft", "hard", "mntudp", "tcp", "udp", "wsize", "rsize",
"retrans", "acregmin", "acregmax", "acdirmin", "acdirmax", "resvport",
"readahead", "hostname", "timeout", "addr", "fh", "nfsv3", "sec",
"principal", "nfsv4", "gssname", "allgssname", "dirpath",
NULL };
/*
* 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)
{
struct nfs_args args = {
.version = NFS_ARGSVERSION,
.addr = NULL,
.addrlen = sizeof (struct sockaddr_in),
.sotype = SOCK_STREAM,
.proto = 0,
.fh = NULL,
.fhsize = 0,
.flags = 0,
.wsize = NFS_WSIZE,
.rsize = NFS_RSIZE,
.readdirsize = NFS_READDIRSIZE,
.timeo = 10,
.retrans = NFS_RETRANS,
.readahead = NFS_DEFRAHEAD,
.wcommitsize = 0, /* was: NQ_DEFLEASE */
.hostname = NULL,
/* args version 4 */
.acregmin = NFS_MINATTRTIMO,
.acregmax = NFS_MAXATTRTIMO,
.acdirmin = NFS_MINDIRATTRTIMO,
.acdirmax = NFS_MAXDIRATTRTIMO,
.dirlen = 0,
.krbnamelen = 0,
.srvkrbnamelen = 0,
};
int error = 0, ret, len;
struct sockaddr *nam = NULL;
struct vnode *vp;
struct thread *td;
char hst[MNAMELEN];
u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100];
char *opt, *name, *secname;
if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) {
error = EINVAL;
goto out;
}
td = curthread;
if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS) {
error = ncl_mountroot(mp);
goto out;
}
nfscl_init();
/* Handle the new style options. */
if (vfs_getopt(mp->mnt_optnew, "noconn", NULL, NULL) == 0)
args.flags |= NFSMNT_NOCONN;
if (vfs_getopt(mp->mnt_optnew, "conn", NULL, NULL) == 0)
args.flags |= NFSMNT_NOCONN;
if (vfs_getopt(mp->mnt_optnew, "nolockd", NULL, NULL) == 0)
args.flags |= NFSMNT_NOLOCKD;
if (vfs_getopt(mp->mnt_optnew, "lockd", NULL, NULL) == 0)
args.flags &= ~NFSMNT_NOLOCKD;
if (vfs_getopt(mp->mnt_optnew, "intr", NULL, NULL) == 0)
args.flags |= NFSMNT_INT;
if (vfs_getopt(mp->mnt_optnew, "rdirplus", NULL, NULL) == 0)
args.flags |= NFSMNT_RDIRPLUS;
if (vfs_getopt(mp->mnt_optnew, "resvport", NULL, NULL) == 0)
args.flags |= NFSMNT_RESVPORT;
if (vfs_getopt(mp->mnt_optnew, "noresvport", NULL, NULL) == 0)
args.flags &= ~NFSMNT_RESVPORT;
if (vfs_getopt(mp->mnt_optnew, "soft", NULL, NULL) == 0)
args.flags |= NFSMNT_SOFT;
if (vfs_getopt(mp->mnt_optnew, "hard", NULL, NULL) == 0)
args.flags &= ~NFSMNT_SOFT;
if (vfs_getopt(mp->mnt_optnew, "mntudp", NULL, NULL) == 0)
args.sotype = SOCK_DGRAM;
if (vfs_getopt(mp->mnt_optnew, "udp", NULL, NULL) == 0)
args.sotype = SOCK_DGRAM;
if (vfs_getopt(mp->mnt_optnew, "tcp", NULL, NULL) == 0)
args.sotype = SOCK_STREAM;
if (vfs_getopt(mp->mnt_optnew, "nfsv3", NULL, NULL) == 0)
args.flags |= NFSMNT_NFSV3;
if (vfs_getopt(mp->mnt_optnew, "nfsv4", NULL, NULL) == 0) {
args.flags |= NFSMNT_NFSV4;
args.sotype = SOCK_STREAM;
}
if (vfs_getopt(mp->mnt_optnew, "allgssname", NULL, NULL) == 0)
args.flags |= NFSMNT_ALLGSSNAME;
if (vfs_getopt(mp->mnt_optnew, "readdirsize", (void **)&opt, NULL) == 0) {
if (opt == NULL) {
vfs_mount_error(mp, "illegal readdirsize");
error = EINVAL;
goto out;
}
ret = sscanf(opt, "%d", &args.readdirsize);
if (ret != 1 || args.readdirsize <= 0) {
vfs_mount_error(mp, "illegal readdirsize: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_READDIRSIZE;
}
if (vfs_getopt(mp->mnt_optnew, "readahead", (void **)&opt, NULL) == 0) {
if (opt == NULL) {
vfs_mount_error(mp, "illegal readahead");
error = EINVAL;
goto out;
}
ret = sscanf(opt, "%d", &args.readahead);
if (ret != 1 || args.readahead <= 0) {
vfs_mount_error(mp, "illegal readahead: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_READAHEAD;
}
if (vfs_getopt(mp->mnt_optnew, "wsize", (void **)&opt, NULL) == 0) {
if (opt == NULL) {
vfs_mount_error(mp, "illegal wsize");
error = EINVAL;
goto out;
}
ret = sscanf(opt, "%d", &args.wsize);
if (ret != 1 || args.wsize <= 0) {
vfs_mount_error(mp, "illegal wsize: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_WSIZE;
}
if (vfs_getopt(mp->mnt_optnew, "rsize", (void **)&opt, NULL) == 0) {
if (opt == NULL) {
vfs_mount_error(mp, "illegal rsize");
error = EINVAL;
goto out;
}
ret = sscanf(opt, "%d", &args.rsize);
if (ret != 1 || args.rsize <= 0) {
vfs_mount_error(mp, "illegal wsize: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_RSIZE;
}
if (vfs_getopt(mp->mnt_optnew, "retrans", (void **)&opt, NULL) == 0) {
if (opt == NULL) {
vfs_mount_error(mp, "illegal retrans");
error = EINVAL;
goto out;
}
ret = sscanf(opt, "%d", &args.retrans);
if (ret != 1 || args.retrans <= 0) {
vfs_mount_error(mp, "illegal retrans: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_RETRANS;
}
if (vfs_getopt(mp->mnt_optnew, "acregmin", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acregmin);
if (ret != 1 || args.acregmin < 0) {
vfs_mount_error(mp, "illegal acregmin: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_ACREGMIN;
}
if (vfs_getopt(mp->mnt_optnew, "acregmax", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acregmax);
if (ret != 1 || args.acregmax < 0) {
vfs_mount_error(mp, "illegal acregmax: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_ACREGMAX;
}
if (vfs_getopt(mp->mnt_optnew, "acdirmin", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acdirmin);
if (ret != 1 || args.acdirmin < 0) {
vfs_mount_error(mp, "illegal acdirmin: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_ACDIRMIN;
}
if (vfs_getopt(mp->mnt_optnew, "acdirmax", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acdirmax);
if (ret != 1 || args.acdirmax < 0) {
vfs_mount_error(mp, "illegal acdirmax: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_ACDIRMAX;
}
if (vfs_getopt(mp->mnt_optnew, "timeout", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.timeo);
if (ret != 1 || args.timeo <= 0) {
vfs_mount_error(mp, "illegal timeout: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_TIMEO;
}
if (vfs_getopt(mp->mnt_optnew, "sec",
(void **) &secname, NULL) == 0)
nfs_sec_name(secname, &args.flags);
if (mp->mnt_flag & MNT_UPDATE) {
struct nfsmount *nmp = VFSTONFS(mp);
if (nmp == NULL) {
error = EIO;
goto out;
}
/*
* When doing an update, we can't change version,
* security, switch lockd strategies or change cookie
* translation
*/
args.flags = (args.flags &
~(NFSMNT_NFSV3 |
NFSMNT_NFSV4 |
NFSMNT_KERB |
NFSMNT_INTEGRITY |
NFSMNT_PRIVACY |
NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) |
(nmp->nm_flag &
(NFSMNT_NFSV3 |
NFSMNT_NFSV4 |
NFSMNT_KERB |
NFSMNT_INTEGRITY |
NFSMNT_PRIVACY |
NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/));
nfs_decode_args(mp, nmp, &args, td->td_ucred, td);
goto out;
}
/*
* Make the nfs_ip_paranoia sysctl serve as the default connection
* or no-connection mode for those protocols that support
* no-connection mode (the flag will be cleared later for protocols
* that do not support no-connection mode). This will allow a client
* to receive replies from a different IP then the request was
* sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
* not 0.
*/
if (nfs_ip_paranoia == 0)
args.flags |= NFSMNT_NOCONN;
if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh,
&args.fhsize) == 0) {
if (args.fhsize > NFSX_FHMAX) {
vfs_mount_error(mp, "Bad file handle");
error = EINVAL;
goto out;
}
bcopy(args.fh, nfh, args.fhsize);
} else {
args.fhsize = 0;
}
(void) vfs_getopt(mp->mnt_optnew, "hostname", (void **)&args.hostname,
&len);
if (args.hostname == NULL) {
vfs_mount_error(mp, "Invalid hostname");
error = EINVAL;
goto out;
}
bcopy(args.hostname, hst, MNAMELEN);
hst[MNAMELEN - 1] = '\0';
if (vfs_getopt(mp->mnt_optnew, "principal", (void **)&name, NULL) == 0)
strlcpy(srvkrbname, name, sizeof (srvkrbname));
else
snprintf(srvkrbname, sizeof (srvkrbname), "nfs@%s", hst);
args.srvkrbnamelen = strlen(srvkrbname);
if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0)
strlcpy(krbname, name, sizeof (krbname));
else
krbname[0] = '\0';
args.krbnamelen = strlen(krbname);
if (vfs_getopt(mp->mnt_optnew, "dirpath", (void **)&name, NULL) == 0)
strlcpy(dirpath, name, sizeof (dirpath));
else
dirpath[0] = '\0';
args.dirlen = strlen(dirpath);
if (vfs_getopt(mp->mnt_optnew, "addr", (void **)&args.addr,
&args.addrlen) == 0) {
if (args.addrlen > SOCK_MAXADDRLEN) {
error = ENAMETOOLONG;
goto out;
}
nam = malloc(args.addrlen, M_SONAME, M_WAITOK);
bcopy(args.addr, nam, args.addrlen);
nam->sa_len = args.addrlen;
}
args.fh = nfh;
error = mountnfs(&args, mp, nam, hst, krbname, dirpath, srvkrbname,
&vp, td->td_ucred, td);
out:
if (!error) {
MNT_ILOCK(mp);
mp->mnt_kern_flag |= (MNTK_MPSAFE|MNTK_LOOKUP_SHARED);
MNT_IUNLOCK(mp);
}
return (error);
}
/*
* 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_cmount(struct mntarg *ma, void *data, int flags)
{
int error;
struct nfs_args args;
error = copyin(data, &args, sizeof (struct nfs_args));
if (error)
return error;
ma = mount_arg(ma, "nfs_args", &args, sizeof args);
error = kernel_mount(ma, flags);
return (error);
}
/*
* Common code for mount and mountroot
*/
static int
mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
char *hst, u_char *krbname, u_char *dirpath, u_char *srvkrbname,
struct vnode **vpp, struct ucred *cred, struct thread *td)
{
struct nfsmount *nmp;
struct nfsnode *np;
int error, trycnt, ret;
struct nfsvattr nfsva;
static u_int64_t clval = 0;
if (mp->mnt_flag & MNT_UPDATE) {
nmp = VFSTONFS(mp);
printf("%s: MNT_UPDATE is no longer handled here\n", __func__);
FREE(nam, M_SONAME);
return (0);
} else {
MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount) +
argp->krbnamelen + argp->dirlen + argp->srvkrbnamelen + 2,
M_NEWNFSMNT, M_WAITOK);
bzero((caddr_t)nmp, sizeof (struct nfsmount) +
argp->krbnamelen + argp->dirlen + argp->srvkrbnamelen + 2);
TAILQ_INIT(&nmp->nm_bufq);
if (clval == 0)
clval = (u_int64_t)nfsboottime.tv_sec;
nmp->nm_clval = clval++;
nmp->nm_krbnamelen = argp->krbnamelen;
nmp->nm_dirpathlen = argp->dirlen;
nmp->nm_srvkrbnamelen = argp->srvkrbnamelen;
if (td->td_ucred->cr_uid != (uid_t)0) {
/*
* nm_uid is used to get KerberosV credentials for
* the nfsv4 state handling operations if there is
* no host based principal set. Use the uid of
* this user if not root, since they are doing the
* mount. I don't think setting this for root will
* work, since root normally does not have user
* credentials in a credentials cache.
*/
nmp->nm_uid = td->td_ucred->cr_uid;
} else {
/*
* Just set to -1, so it won't be used.
*/
nmp->nm_uid = (uid_t)-1;
}
/* Copy and null terminate all the names */
if (nmp->nm_krbnamelen > 0) {
bcopy(krbname, nmp->nm_krbname, nmp->nm_krbnamelen);
nmp->nm_name[nmp->nm_krbnamelen] = '\0';
}
if (nmp->nm_dirpathlen > 0) {
bcopy(dirpath, NFSMNT_DIRPATH(nmp),
nmp->nm_dirpathlen);
nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen
+ 1] = '\0';
}
if (nmp->nm_srvkrbnamelen > 0) {
bcopy(srvkrbname, NFSMNT_SRVKRBNAME(nmp),
nmp->nm_srvkrbnamelen);
nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen
+ nmp->nm_srvkrbnamelen + 2] = '\0';
}
nmp->nm_sockreq.nr_cred = crhold(cred);
mtx_init(&nmp->nm_sockreq.nr_mtx, "nfssock", NULL, MTX_DEF);
mp->mnt_data = nmp;
}
vfs_getnewfsid(mp);
nmp->nm_mountp = mp;
mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK);
nfs_decode_args(mp, nmp, argp, cred, td);
/*
* V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
* high, depending on whether we end up with negative offsets in
* the client or server somewhere. 2GB-1 may be safer.
*
* For V3, ncl_fsinfo will adjust this as necessary. Assume maximum
* that we can handle until we find out otherwise.
* XXX Our "safe" limit on the client is what we can store in our
* buffer cache using signed(!) block numbers.
*/
if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0)
nmp->nm_maxfilesize = 0xffffffffLL;
else
nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
nmp->nm_timeo = NFS_TIMEO;
nmp->nm_retry = NFS_RETRANS;
if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) {
nmp->nm_wsize = NFS_WSIZE;
nmp->nm_rsize = NFS_RSIZE;
nmp->nm_readdirsize = NFS_READDIRSIZE;
}
nmp->nm_wcommitsize = hibufspace / (desiredvnodes / 1000);
nmp->nm_numgrps = NFS_MAXGRPS;
nmp->nm_readahead = NFS_DEFRAHEAD;
nmp->nm_tprintf_delay = nfs_tprintf_delay;
if (nmp->nm_tprintf_delay < 0)
nmp->nm_tprintf_delay = 0;
nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay;
if (nmp->nm_tprintf_initial_delay < 0)
nmp->nm_tprintf_initial_delay = 0;
nmp->nm_fhsize = argp->fhsize;
if (nmp->nm_fhsize > 0)
bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
bcopy(hst, mp->mnt_stat.f_mntfromname, 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_sockreq.nr_prog = NFS_PROG;
if ((argp->flags & NFSMNT_NFSV4))
nmp->nm_sockreq.nr_vers = NFS_VER4;
else if ((argp->flags & NFSMNT_NFSV3))
nmp->nm_sockreq.nr_vers = NFS_VER3;
else
nmp->nm_sockreq.nr_vers = NFS_VER2;
if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0)))
goto bad;
/*
* A reference count is needed on the nfsnode representing the
* remote root. If this object is not persistent, then backward
* traversals of the mount point (i.e. "..") will not work if
* the nfsnode gets flushed out of the cache. Ufs does not have
* this problem, because one can identify root inodes by their
* number == ROOTINO (2).
*/
if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) &&
nmp->nm_dirpathlen > 0) {
/*
* If the fhsize on the mount point == 0 for V4, the mount
* path needs to be looked up.
*/
trycnt = 3;
do {
error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp),
cred, td);
if (error)
(void) nfs_catnap(PZERO, "nfsgetdirp");
} while (error && --trycnt > 0);
if (error) {
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
goto bad;
}
}
if (nmp->nm_fhsize > 0) {
/*
* Set f_iosize to NFS_DIRBLKSIZ so that bo_bsize gets set
* non-zero for the root vnode. f_iosize will be set correctly
* by nfs_statfs() before any I/O occurs.
*/
mp->mnt_stat.f_iosize = NFS_DIRBLKSIZ;
error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np);
if (error)
goto bad;
*vpp = NFSTOV(np);
/*
* Get file attributes and transfer parameters for the
* mountpoint. This has the side effect of filling in
* (*vpp)->v_type with the correct value.
*/
ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1,
cred, td, &nfsva, NULL);
if (ret) {
/*
* Just set default values to get things going.
*/
NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr));
nfsva.na_vattr.va_type = VDIR;
nfsva.na_vattr.va_mode = 0777;
nfsva.na_vattr.va_nlink = 100;
nfsva.na_vattr.va_uid = (uid_t)0;
nfsva.na_vattr.va_gid = (gid_t)0;
nfsva.na_vattr.va_fileid = 2;
nfsva.na_vattr.va_gen = 1;
nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE;
nfsva.na_vattr.va_size = 512 * 1024;
}
(void) nfscl_loadattrcache(vpp, &nfsva, NULL, NULL, 0, 1);
if (argp->flags & NFSMNT_NFSV3)
ncl_fsinfo(nmp, *vpp, cred, td);
/*
* Lose the lock but keep the ref.
*/
VOP_UNLOCK(*vpp, 0);
return (0);
}
error = EIO;
bad:
newnfs_disconnect(&nmp->nm_sockreq);
crfree(nmp->nm_sockreq.nr_cred);
mtx_destroy(&nmp->nm_sockreq.nr_mtx);
mtx_destroy(&nmp->nm_mtx);
FREE(nmp, M_NEWNFSMNT);
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, trycnt = 0;
td = curthread;
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 (mntflags & MNT_FORCE) {
error = newnfs_nmcancelreqs(nmp);
if (error)
goto out;
/* For a forced close, get rid of the renew thread now */
nfscl_umount(nmp, td);
}
/* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */
do {
error = vflush(mp, 1, flags, td);
if ((mntflags & MNT_FORCE) && error != 0 && ++trycnt < 30)
(void) nfs_catnap(PSOCK, "newndm");
} while ((mntflags & MNT_FORCE) && error != 0 && trycnt < 30);
if (error)
goto out;
/*
* We are now committed to the unmount.
*/
if ((mntflags & MNT_FORCE) == 0)
nfscl_umount(nmp, td);
newnfs_disconnect(&nmp->nm_sockreq);
crfree(nmp->nm_sockreq.nr_cred);
FREE(nmp->nm_nam, M_SONAME);
mtx_destroy(&nmp->nm_sockreq.nr_mtx);
mtx_destroy(&nmp->nm_mtx);
FREE(nmp, M_NEWNFSMNT);
out:
return (error);
}
/*
* Return root of a filesystem
*/
static int
nfs_root(struct mount *mp, int flags, struct vnode **vpp)
{
struct vnode *vp;
struct nfsmount *nmp;
struct nfsnode *np;
int error;
nmp = VFSTONFS(mp);
error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np);
if (error)
return error;
vp = NFSTOV(np);
/*
* Get transfer parameters and attributes for root vnode once.
*/
mtx_lock(&nmp->nm_mtx);
if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) {
mtx_unlock(&nmp->nm_mtx);
ncl_fsinfo(nmp, vp, curthread->td_ucred, curthread);
} else
mtx_unlock(&nmp->nm_mtx);
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 vnode *vp, *mvp;
struct thread *td;
int error, allerror = 0;
td = curthread;
/*
* Force stale buffer cache information to be flushed.
*/
MNT_ILOCK(mp);
loop:
MNT_VNODE_FOREACH(vp, mp, mvp) {
VI_LOCK(vp);
MNT_IUNLOCK(mp);
/* XXX Racy bv_cnt check. */
if (VOP_ISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
waitfor == MNT_LAZY) {
VI_UNLOCK(vp);
MNT_ILOCK(mp);
continue;
}
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
MNT_ILOCK(mp);
MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
goto loop;
}
error = VOP_FSYNC(vp, waitfor, td);
if (error)
allerror = error;
VOP_UNLOCK(vp, 0);
vrele(vp);
MNT_ILOCK(mp);
}
MNT_IUNLOCK(mp);
return (allerror);
}
static int
nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req)
{
struct nfsmount *nmp = VFSTONFS(mp);
struct vfsquery vq;
int error;
bzero(&vq, sizeof(vq));
switch (op) {
#if 0
case VFS_CTL_NOLOCKS:
val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0;
if (req->oldptr != NULL) {
error = SYSCTL_OUT(req, &val, sizeof(val));
if (error)
return (error);
}
if (req->newptr != NULL) {
error = SYSCTL_IN(req, &val, sizeof(val));
if (error)
return (error);
if (val)
nmp->nm_flag |= NFSMNT_NOLOCKS;
else
nmp->nm_flag &= ~NFSMNT_NOLOCKS;
}
break;
#endif
case VFS_CTL_QUERY:
mtx_lock(&nmp->nm_mtx);
if (nmp->nm_state & NFSSTA_TIMEO)
vq.vq_flags |= VQ_NOTRESP;
mtx_unlock(&nmp->nm_mtx);
#if 0
if (!(nmp->nm_flag & NFSMNT_NOLOCKS) &&
(nmp->nm_state & NFSSTA_LOCKTIMEO))
vq.vq_flags |= VQ_NOTRESPLOCK;
#endif
error = SYSCTL_OUT(req, &vq, sizeof(vq));
break;
case VFS_CTL_TIMEO:
if (req->oldptr != NULL) {
error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay,
sizeof(nmp->nm_tprintf_initial_delay));
if (error)
return (error);
}
if (req->newptr != NULL) {
error = vfs_suser(mp, req->td);
if (error)
return (error);
error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay,
sizeof(nmp->nm_tprintf_initial_delay));
if (error)
return (error);
if (nmp->nm_tprintf_initial_delay < 0)
nmp->nm_tprintf_initial_delay = 0;
}
break;
default:
return (ENOTSUP);
}
return (0);
}
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