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freebsd-src/sys/fs/nfsclient/nfs_clvfsops.c
Warner Losh 685dc743dc sys: Remove $FreeBSD$: one-line .c pattern 
Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
2023-08-16 11:54:36 -06:00

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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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. 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>
#include "opt_bootp.h"
#include "opt_nfsroot.h"
#include "opt_kern_tls.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/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.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 <net/route/route_ctl.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 <nfs/nfsdiskless.h>
#include <rpc/rpcsec_tls.h>
FEATURE(nfscl, "NFSv4 client");
extern int nfscl_ticks;
extern struct timeval nfsboottime;
extern int nfsrv_useacl;
extern int nfscl_debuglevel;
extern enum nfsiod_state ncl_iodwant[NFS_MAXASYNCDAEMON];
extern struct nfsmount *ncl_iodmount[NFS_MAXASYNCDAEMON];
extern struct mtx ncl_iod_mutex;
NFSCLSTATEMUTEX;
extern struct mtx nfsrv_dslock_mtx;
MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "NFS request header");
MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "NFS mount struct");
SYSCTL_DECL(_vfs_nfs);
static int nfs_ip_paranoia = 1;
SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
&nfs_ip_paranoia, 0, "");
static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY;
SYSCTL_INT(_vfs_nfs, 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_nfs, NFS_TPRINTF_DELAY,
downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, "");
#ifdef NFS_DEBUG
int nfs_debug;
SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0,
"Toggle debug flag");
#endif
static int nfs_mountroot(struct mount *);
static void nfs_sec_name(char *, int *);
static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp,
struct nfs_args *argp, const char *, struct ucred *,
struct thread *);
static int mountnfs(struct nfs_args *, struct mount *,
struct sockaddr *, char *, u_char *, int, u_char *, int,
u_char *, int, struct vnode **, struct ucred *,
struct thread *, int, int, int, uint32_t, char *, int);
static void nfs_getnlminfo(struct vnode *, uint8_t *, size_t *,
struct sockaddr_storage *, int *, off_t *,
struct timeval *);
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;
static vfs_purge_t nfs_purge;
/*
* nfs vfs operations.
*/
static struct vfsops nfs_vfsops = {
.vfs_init = ncl_init,
.vfs_mount = nfs_mount,
.vfs_cmount = nfs_cmount,
.vfs_root = vfs_cache_root,
.vfs_cachedroot = nfs_root,
.vfs_statfs = nfs_statfs,
.vfs_sync = nfs_sync,
.vfs_uninit = ncl_uninit,
.vfs_unmount = nfs_unmount,
.vfs_sysctl = nfs_sysctl,
.vfs_purge = nfs_purge,
};
/*
* This macro declares that the file system type is named "nfs".
* It also declares a module name of "nfs" and uses vfs_modevent()
* as the event handling function.
* The main module declaration is found in sys/fs/nfsclient/nfs_clport.c
* for "nfscl" and is needed so that a custom event handling
* function gets called. MODULE_DEPEND() macros are found there.
*/
VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK | VFCF_SBDRY);
MODULE_VERSION(nfs, 1);
/*
* This structure is now defined in sys/nfs/nfs_diskless.c so that it
* can be shared by both NFS clients. It is declared here so that it
* will be defined for kernels built without NFS_ROOT, although it
* isn't used in that case.
*/
#if !defined(NFS_ROOT)
struct nfs_diskless nfs_diskless = { { { 0 } } };
struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
int nfs_diskless_valid = 0;
#endif
SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
&nfs_diskless_valid, 0,
"Has the diskless struct been filled correctly");
SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
nfsv3_diskless.root_hostnam, 0, "Path to nfs root");
SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
&nfsv3_diskless.root_saddr, sizeof(nfsv3_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 > NFS_MAXBSIZE)
nmp->nm_rsize = NFS_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 > NFS_MAXBSIZE)
nmp->nm_wsize = NFS_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. It must also be at least NFS_DIRBLKSIZ, since
* that is the buffer size used for directories.
*/
iosize = imax(nmp->nm_rsize, nmp->nm_wsize);
iosize = imax(iosize, PAGE_SIZE);
iosize = imax(iosize, NFS_DIRBLKSIZ);
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(&nfs_diskless.myif, &nfsv3_diskless.myif,
sizeof(struct ifaliasreq));
bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway,
sizeof(struct sockaddr_in));
nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args);
if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) {
nfsv3_diskless.root_fhsize = NFSX_MYFH;
bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_MYFH);
} else {
nfsv3_diskless.root_fhsize = NFSX_V2FH;
bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH);
}
bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr,
sizeof(struct sockaddr_in));
bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN);
nfsv3_diskless.root_time = nfs_diskless.root_time;
bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam,
MAXHOSTNAMELEN);
nfs_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;
char *fakefh;
td = curthread;
error = vfs_busy(mp, MBF_NOWAIT);
if (error)
return (error);
if ((nmp->nm_privflag & NFSMNTP_FAKEROOTFH) != 0) {
if (nmp->nm_fhsize == 0) {
error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp),
td->td_ucred, td);
if (error != 0) {
/*
* We cannot do anything yet. Hopefully what
* is in mnt_stat is sufficient.
*/
if (sbp != &mp->mnt_stat)
*sbp = mp->mnt_stat;
strncpy(&sbp->f_fstypename[0],
mp->mnt_vfc->vfc_name, MFSNAMELEN);
vfs_unbusy(mp);
return (0);
}
}
fakefh = malloc(NFSX_FHMAX + 1, M_TEMP, M_WAITOK | M_ZERO);
error = ncl_nget(mp, fakefh, NFSX_FHMAX + 1, &np, LK_EXCLUSIVE);
free(fakefh, M_TEMP);
} else {
error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np,
LK_EXCLUSIVE);
}
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);
if (!error)
gotfsinfo = 1;
} else
mtx_unlock(&nmp->nm_mtx);
if (!error)
error = nfsrpc_statfs(vp, &sb, &fs, NULL, td->td_ucred, td,
&nfsva, &attrflag);
if ((nmp->nm_privflag & NFSMNTP_FAKEROOTFH) != 0 &&
error == NFSERR_WRONGSEC) {
/* Cannot get new stats, so return what is in mnt_stat. */
if (sbp != &mp->mnt_stat)
*sbp = mp->mnt_stat;
strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name,
MFSNAMELEN);
vput(vp);
vfs_unbusy(mp);
return (0);
}
if (error != 0)
NFSCL_DEBUG(2, "statfs=%d\n", error);
if (attrflag == 0) {
ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1,
td->td_ucred, td, &nfsva, NULL, 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, 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_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);
if (!error) {
if (attrflag)
(void) nfscl_loadattrcache(&vp, &nfsva, 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
* nfs_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 nfs_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.
*/
static int
nfs_mountroot(struct mount *mp)
{
struct thread *td = curthread;
struct nfsv3_diskless *nd = &nfsv3_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 (nfs_diskless_valid == 0)
return (-1);
if (nfs_diskless_valid == 1)
nfs_convert_diskless();
/*
* 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 = kern_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;
struct epoch_tracker et;
struct rt_addrinfo info;
struct rib_cmd_info rc;
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 */
NET_EPOCH_ENTER(et);
CURVNET_SET(TD_TO_VNET(td));
bzero((caddr_t)&info, sizeof(info));
info.rti_flags = RTF_UP | RTF_GATEWAY;
info.rti_info[RTAX_DST] = (struct sockaddr *)&sin;
info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&nd->mygateway;
info.rti_info[RTAX_NETMASK] = (struct sockaddr *)&mask;
error = rib_action(RT_DEFAULT_FIB, RTM_ADD, &info, &rc);
CURVNET_RESTORE();
NET_EPOCH_EXIT(et);
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 dirlen, error;
char *dirpath;
/*
* Find the directory path in "path", which also has the server's
* name/ip address in it.
*/
dirpath = strchr(path, ':');
if (dirpath != NULL)
dirlen = strlen(++dirpath);
else
dirlen = 0;
nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK);
if ((error = mountnfs(args, mp, nam, path, NULL, 0, dirpath, dirlen,
NULL, 0, vpp, td->td_ucred, td, NFS_DEFAULT_NAMETIMEO,
NFS_DEFAULT_NEGNAMETIMEO, 0, 0, NULL, 0)) != 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,
const char *hostname, struct ucred *cred, struct thread *td)
{
int adjsock;
char *p;
/*
* 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;
if ((argp->flags & NFSMNT_NFSV4) != 0)
nmp->nm_retry = INT_MAX;
else
nmp->nm_retry = NFS_RETRANS_TCP;
}
/* Also clear RDIRPLUS if NFSv2, it crashes some servers */
if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) {
argp->flags &= ~NFSMNT_RDIRPLUS;
nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
}
/* Clear ONEOPENOWN for NFSv2, 3 and 4.0. */
if (nmp->nm_minorvers == 0) {
argp->flags &= ~NFSMNT_ONEOPENOWN;
nmp->nm_flag &= ~NFSMNT_ONEOPENOWN;
}
/* 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;
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;
/*
* Clip at the power of 2 below the size. There is an
* issue (not isolated) that causes intermittent page
* faults if this is not done.
*/
if (nmp->nm_wsize > NFS_FABLKSIZE)
nmp->nm_wsize = 1 << (fls(nmp->nm_wsize) - 1);
else
nmp->nm_wsize = NFS_FABLKSIZE;
}
if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
nmp->nm_rsize = argp->rsize;
/*
* Clip at the power of 2 below the size. There is an
* issue (not isolated) that causes intermittent page
* faults if this is not done.
*/
if (nmp->nm_rsize > NFS_FABLKSIZE)
nmp->nm_rsize = 1 << (fls(nmp->nm_rsize) - 1);
else
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, &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, false, &nmp->nm_sockreq.nr_client)) {
printf("newnfs_args: retrying connect\n");
(void) nfs_catnap(PSOCK, 0, "nfscon");
}
}
} else {
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
}
if (hostname != NULL) {
strlcpy(nmp->nm_hostname, hostname,
sizeof(nmp->nm_hostname));
p = strchr(nmp->nm_hostname, ':');
if (p != NULL)
*p = '\0';
}
}
static const char *nfs_opts[] = { "from", "nfs_args",
"noac", "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", "actimeo", "acregmin", "acregmax", "acdirmin", "acdirmax",
"resvport", "readahead", "hostname", "timeo", "timeout", "addr", "fh",
"nfsv3", "sec", "principal", "nfsv4", "gssname", "allgssname", "dirpath",
"minorversion", "nametimeo", "negnametimeo", "nocto", "noncontigwr",
"pnfs", "wcommitsize", "oneopenown", "tls", "tlscertname", "nconnect",
"syskrb5", NULL };
/*
* Parse the "from" mountarg, passed by the generic mount(8) program
* or the mountroot code. This is used when rerooting into NFS.
*
* Note that the "hostname" is actually a "hostname:/share/path" string.
*/
static int
nfs_mount_parse_from(struct vfsoptlist *opts, char **hostnamep,
struct sockaddr_in **sinp, char *dirpath, size_t dirpathsize, int *dirlenp)
{
char *nam, *delimp, *hostp, *spec;
int error, have_bracket = 0, offset, rv, speclen;
struct sockaddr_in *sin;
size_t len;
error = vfs_getopt(opts, "from", (void **)&spec, &speclen);
if (error != 0)
return (error);
nam = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK);
/*
* This part comes from sbin/mount_nfs/mount_nfs.c:getnfsargs().
*/
if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL &&
*(delimp + 1) == ':') {
hostp = spec + 1;
spec = delimp + 2;
have_bracket = 1;
} else if ((delimp = strrchr(spec, ':')) != NULL) {
hostp = spec;
spec = delimp + 1;
} else if ((delimp = strrchr(spec, '@')) != NULL) {
printf("%s: path@server syntax is deprecated, "
"use server:path\n", __func__);
hostp = delimp + 1;
} else {
printf("%s: no <host>:<dirpath> nfs-name\n", __func__);
free(nam, M_TEMP);
return (EINVAL);
}
*delimp = '\0';
/*
* If there has been a trailing slash at mounttime it seems
* that some mountd implementations fail to remove the mount
* entries from their mountlist while unmounting.
*/
for (speclen = strlen(spec);
speclen > 1 && spec[speclen - 1] == '/';
speclen--)
spec[speclen - 1] = '\0';
if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
printf("%s: %s:%s: name too long", __func__, hostp, spec);
free(nam, M_TEMP);
return (EINVAL);
}
/* Make both '@' and ':' notations equal */
if (*hostp != '\0') {
len = strlen(hostp);
offset = 0;
if (have_bracket)
nam[offset++] = '[';
memmove(nam + offset, hostp, len);
if (have_bracket)
nam[len + offset++] = ']';
nam[len + offset++] = ':';
memmove(nam + len + offset, spec, speclen);
nam[len + speclen + offset] = '\0';
} else
nam[0] = '\0';
/*
* XXX: IPv6
*/
sin = malloc(sizeof(*sin), M_SONAME, M_WAITOK);
rv = inet_pton(AF_INET, hostp, &sin->sin_addr);
if (rv != 1) {
printf("%s: cannot parse '%s', inet_pton() returned %d\n",
__func__, hostp, rv);
free(nam, M_TEMP);
free(sin, M_SONAME);
return (EINVAL);
}
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
/*
* XXX: hardcoded port number.
*/
sin->sin_port = htons(2049);
*hostnamep = strdup(nam, M_NEWNFSMNT);
*sinp = sin;
strlcpy(dirpath, spec, dirpathsize);
*dirlenp = strlen(dirpath);
free(nam, M_TEMP);
return (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 getsockaddr() call because getsockaddr() 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 = NFSMNT_RESVPORT,
.wsize = NFS_WSIZE,
.rsize = NFS_RSIZE,
.readdirsize = NFS_READDIRSIZE,
.timeo = 10,
.retrans = NFS_RETRANS,
.readahead = NFS_DEFRAHEAD,
.wcommitsize = 0, /* was: NQ_DEFLEASE */
.hostname = NULL,
.acregmin = NFS_MINATTRTIMO,
.acregmax = NFS_MAXATTRTIMO,
.acdirmin = NFS_MINDIRATTRTIMO,
.acdirmax = NFS_MAXDIRATTRTIMO,
};
int error = 0, ret, len;
struct sockaddr *nam = NULL;
struct vnode *vp;
struct thread *td;
char *hst;
u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100];
char *cp, *opt, *name, *secname, *tlscertname;
int nametimeo = NFS_DEFAULT_NAMETIMEO;
int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO;
int minvers = -1;
int dirlen, has_nfs_args_opt, has_nfs_from_opt,
krbnamelen, srvkrbnamelen;
size_t hstlen;
uint32_t newflag;
int aconn = 0;
has_nfs_args_opt = 0;
has_nfs_from_opt = 0;
newflag = 0;
tlscertname = NULL;
hst = malloc(MNAMELEN, M_TEMP, M_WAITOK);
if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) {
error = EINVAL;
goto out;
}
td = curthread;
if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS &&
nfs_diskless_valid != 0) {
error = nfs_mountroot(mp);
goto out;
}
nfscl_init();
/*
* The old mount_nfs program passed the struct nfs_args
* from userspace to kernel. The new mount_nfs program
* passes string options via nmount() from userspace to kernel
* and we populate the struct nfs_args in the kernel.
*/
if (vfs_getopt(mp->mnt_optnew, "nfs_args", NULL, NULL) == 0) {
error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args,
sizeof(args));
if (error != 0)
goto out;
if (args.version != NFS_ARGSVERSION) {
error = EPROGMISMATCH;
goto out;
}
has_nfs_args_opt = 1;
}
/* Handle the new style options. */
if (vfs_getopt(mp->mnt_optnew, "noac", NULL, NULL) == 0) {
args.acdirmin = args.acdirmax =
args.acregmin = args.acregmax = 0;
args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX |
NFSMNT_ACREGMIN | NFSMNT_ACREGMAX;
}
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, "nocto", NULL, NULL) == 0)
args.flags |= NFSMNT_NOCTO;
if (vfs_getopt(mp->mnt_optnew, "noncontigwr", NULL, NULL) == 0)
args.flags |= NFSMNT_NONCONTIGWR;
if (vfs_getopt(mp->mnt_optnew, "pnfs", NULL, NULL) == 0)
args.flags |= NFSMNT_PNFS;
if (vfs_getopt(mp->mnt_optnew, "oneopenown", NULL, NULL) == 0)
args.flags |= NFSMNT_ONEOPENOWN;
if (vfs_getopt(mp->mnt_optnew, "tls", NULL, NULL) == 0)
newflag |= NFSMNT_TLS;
if (vfs_getopt(mp->mnt_optnew, "tlscertname", (void **)&opt, &len) ==
0) {
/*
* tlscertname with "key.pem" appended to it forms a file
* name. As such, the maximum allowable strlen(tlscertname) is
* NAME_MAX - 7. However, "len" includes the nul termination
* byte so it can be up to NAME_MAX - 6.
*/
if (opt == NULL || len <= 1 || len > NAME_MAX - 6) {
vfs_mount_error(mp, "invalid tlscertname");
error = EINVAL;
goto out;
}
tlscertname = malloc(len, M_NEWNFSMNT, M_WAITOK);
strlcpy(tlscertname, opt, len);
}
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, "actimeo", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.acregmin);
if (ret != 1 || args.acregmin < 0) {
vfs_mount_error(mp, "illegal actimeo: %s",
opt);
error = EINVAL;
goto out;
}
args.acdirmin = args.acdirmax = args.acregmax = args.acregmin;
args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX |
NFSMNT_ACREGMIN | NFSMNT_ACREGMAX;
}
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, "wcommitsize", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.wcommitsize);
if (ret != 1 || args.wcommitsize < 0) {
vfs_mount_error(mp, "illegal wcommitsize: %s", opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_WCOMMITSIZE;
}
if (vfs_getopt(mp->mnt_optnew, "timeo", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &args.timeo);
if (ret != 1 || args.timeo <= 0) {
vfs_mount_error(mp, "illegal timeo: %s",
opt);
error = EINVAL;
goto out;
}
args.flags |= NFSMNT_TIMEO;
}
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, "nametimeo", (void **)&opt, NULL) == 0) {
ret = sscanf(opt, "%d", &nametimeo);
if (ret != 1 || nametimeo < 0) {
vfs_mount_error(mp, "illegal nametimeo: %s", opt);
error = EINVAL;
goto out;
}
}
if (vfs_getopt(mp->mnt_optnew, "negnametimeo", (void **)&opt, NULL)
== 0) {
ret = sscanf(opt, "%d", &negnametimeo);
if (ret != 1 || negnametimeo < 0) {
vfs_mount_error(mp, "illegal negnametimeo: %s",
opt);
error = EINVAL;
goto out;
}
}
if (vfs_getopt(mp->mnt_optnew, "minorversion", (void **)&opt, NULL) ==
0) {
ret = sscanf(opt, "%d", &minvers);
if (ret != 1 || minvers < 0 || minvers > 2 ||
(args.flags & NFSMNT_NFSV4) == 0) {
vfs_mount_error(mp, "illegal minorversion: %s", opt);
error = EINVAL;
goto out;
}
}
if (vfs_getopt(mp->mnt_optnew, "nconnect", (void **)&opt, NULL) ==
0) {
ret = sscanf(opt, "%d", &aconn);
if (ret != 1 || aconn < 1 || aconn > NFS_MAXNCONN) {
vfs_mount_error(mp, "illegal nconnect: %s", opt);
error = EINVAL;
goto out;
}
/*
* Setting nconnect=1 is a no-op, allowed so that
* the option can be used in a Linux compatible way.
*/
aconn--;
}
if (vfs_getopt(mp->mnt_optnew, "syskrb5", NULL, NULL) == 0)
newflag |= NFSMNT_SYSKRB5;
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;
}
/*
* If a change from TCP->UDP is done and there are thread(s)
* that have I/O RPC(s) in progress with a transfer size
* greater than NFS_MAXDGRAMDATA, those thread(s) will be
* hung, retrying the RPC(s) forever. Usually these threads
* will be seen doing an uninterruptible sleep on wait channel
* "nfsreq".
*/
if (args.sotype == SOCK_DGRAM && nmp->nm_sotype == SOCK_STREAM)
tprintf(td->td_proc, LOG_WARNING,
"Warning: mount -u that changes TCP->UDP can result in hung threads\n");
/*
* When doing an update, we can't change version,
* security, switch lockd strategies, change cookie
* translation or switch oneopenown.
*/
args.flags = (args.flags &
~(NFSMNT_NFSV3 |
NFSMNT_NFSV4 |
NFSMNT_KERB |
NFSMNT_INTEGRITY |
NFSMNT_PRIVACY |
NFSMNT_ONEOPENOWN |
NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) |
(nmp->nm_flag &
(NFSMNT_NFSV3 |
NFSMNT_NFSV4 |
NFSMNT_KERB |
NFSMNT_INTEGRITY |
NFSMNT_PRIVACY |
NFSMNT_ONEOPENOWN |
NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/));
nfs_decode_args(mp, nmp, &args, NULL, 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 (has_nfs_args_opt != 0) {
/*
* In the 'nfs_args' case, the pointers in the args
* structure are in userland - we copy them in here.
*/
if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) {
vfs_mount_error(mp, "Bad file handle");
error = EINVAL;
goto out;
}
error = copyin((caddr_t)args.fh, (caddr_t)nfh,
args.fhsize);
if (error != 0)
goto out;
error = copyinstr(args.hostname, hst, MNAMELEN - 1, &hstlen);
if (error != 0)
goto out;
bzero(&hst[hstlen], MNAMELEN - hstlen);
args.hostname = hst;
/* getsockaddr() call must be after above copyin() calls */
error = getsockaddr(&nam, args.addr, args.addrlen);
if (error != 0)
goto out;
} else if (nfs_mount_parse_from(mp->mnt_optnew,
&args.hostname, (struct sockaddr_in **)&nam, dirpath,
sizeof(dirpath), &dirlen) == 0) {
has_nfs_from_opt = 1;
bcopy(args.hostname, hst, MNAMELEN);
hst[MNAMELEN - 1] = '\0';
/*
* This only works with NFSv4 for now.
*/
args.fhsize = 0;
args.flags |= NFSMNT_NFSV4;
args.sotype = SOCK_STREAM;
} else {
if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh,
&args.fhsize) == 0) {
if (args.fhsize < 0 || 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;
}
if (len >= MNAMELEN) {
vfs_mount_error(mp, "Hostname too long");
error = EINVAL;
goto out;
}
bcopy(args.hostname, hst, len);
hst[len] = '\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);
cp = strchr(srvkrbname, ':');
if (cp != NULL)
*cp = '\0';
}
srvkrbnamelen = strlen(srvkrbname);
if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0)
strlcpy(krbname, name, sizeof (krbname));
else
krbname[0] = '\0';
krbnamelen = strlen(krbname);
if (has_nfs_from_opt == 0) {
if (vfs_getopt(mp->mnt_optnew,
"dirpath", (void **)&name, NULL) == 0)
strlcpy(dirpath, name, sizeof (dirpath));
else
dirpath[0] = '\0';
dirlen = strlen(dirpath);
}
if (has_nfs_args_opt == 0 && has_nfs_from_opt == 0) {
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;
} else {
vfs_mount_error(mp, "No server address");
error = EINVAL;
goto out;
}
}
if (aconn > 0 && (args.sotype != SOCK_STREAM ||
(args.flags & NFSMNT_NFSV4) == 0 || minvers == 0)) {
/*
* RFC 5661 requires that an NFSv4.1/4.2 server
* send an RPC reply on the same TCP connection
* as the one it received the request on.
* This property in required for "nconnect" and
* might not be the case for NFSv3 or NFSv4.0 servers.
*/
vfs_mount_error(mp, "nconnect should only be used "
"for NFSv4.1/4.2 mounts");
error = EINVAL;
goto out;
}
if ((newflag & NFSMNT_SYSKRB5) != 0 &&
((args.flags & NFSMNT_NFSV4) == 0 || minvers == 0)) {
/*
* This option requires the use of SP4_NONE, which
* is only in NFSv4.1/4.2.
*/
vfs_mount_error(mp, "syskrb5 should only be used "
"for NFSv4.1/4.2 mounts");
error = EINVAL;
goto out;
}
if ((newflag & NFSMNT_SYSKRB5) != 0 &&
(args.flags & NFSMNT_KERB) == 0) {
/*
* This option modifies the behaviour of sec=krb5[ip].
*/
vfs_mount_error(mp, "syskrb5 should only be used "
"for sec=krb5[ip] mounts");
error = EINVAL;
goto out;
}
if ((newflag & NFSMNT_SYSKRB5) != 0 && krbname[0] != '\0') {
/*
* This option is used as an alternative to "gssname".
*/
vfs_mount_error(mp, "syskrb5 should not be used "
"with the gssname option");
error = EINVAL;
goto out;
}
args.fh = nfh;
error = mountnfs(&args, mp, nam, hst, krbname, krbnamelen, dirpath,
dirlen, srvkrbname, srvkrbnamelen, &vp, td->td_ucred, td,
nametimeo, negnametimeo, minvers, newflag, tlscertname, aconn);
out:
if (!error) {
MNT_ILOCK(mp);
mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_NO_IOPF |
MNTK_USES_BCACHE;
if ((VFSTONFS(mp)->nm_flag & NFSMNT_NFSV4) != 0)
mp->mnt_kern_flag |= MNTK_NULL_NOCACHE;
MNT_IUNLOCK(mp);
}
free(hst, M_TEMP);
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 getsockaddr() call because getsockaddr() 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, uint64_t 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, int krbnamelen, u_char *dirpath, int dirlen,
u_char *srvkrbname, int srvkrbnamelen, struct vnode **vpp,
struct ucred *cred, struct thread *td, int nametimeo, int negnametimeo,
int minvers, uint32_t newflag, char *tlscertname, int aconn)
{
struct nfsmount *nmp;
struct nfsnode *np;
int error, trycnt, ret;
struct nfsvattr nfsva;
struct nfsclclient *clp;
struct nfsclds *dsp, *tdsp;
uint32_t lease;
bool tryminvers;
char *fakefh;
static u_int64_t clval = 0;
#ifdef KERN_TLS
u_int maxlen;
#endif
NFSCL_DEBUG(3, "in mnt\n");
clp = NULL;
if (mp->mnt_flag & MNT_UPDATE) {
nmp = VFSTONFS(mp);
printf("%s: MNT_UPDATE is no longer handled here\n", __func__);
free(nam, M_SONAME);
free(tlscertname, M_NEWNFSMNT);
return (0);
} else {
/* NFS-over-TLS requires that rpctls be functioning. */
if ((newflag & NFSMNT_TLS) != 0) {
error = EINVAL;
#ifdef KERN_TLS
/* KERN_TLS is only supported for TCP. */
if (argp->sotype == SOCK_STREAM &&
rpctls_getinfo(&maxlen, true, false))
error = 0;
#endif
if (error != 0) {
free(nam, M_SONAME);
free(tlscertname, M_NEWNFSMNT);
return (error);
}
}
nmp = malloc(sizeof (struct nfsmount) +
krbnamelen + dirlen + srvkrbnamelen + 2,
M_NEWNFSMNT, M_WAITOK | M_ZERO);
nmp->nm_tlscertname = tlscertname;
nmp->nm_newflag = newflag;
TAILQ_INIT(&nmp->nm_bufq);
TAILQ_INIT(&nmp->nm_sess);
if (clval == 0)
clval = (u_int64_t)nfsboottime.tv_sec;
nmp->nm_clval = clval++;
nmp->nm_krbnamelen = krbnamelen;
nmp->nm_dirpathlen = dirlen;
nmp->nm_srvkrbnamelen = 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;
nmp->nm_getinfo = nfs_getnlminfo;
nmp->nm_vinvalbuf = ncl_vinvalbuf;
}
vfs_getnewfsid(mp);
nmp->nm_mountp = mp;
mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK);
/*
* Since nfs_decode_args() might optionally set them, these
* need to be set to defaults before the call, so that the
* optional settings aren't overwritten.
*/
nmp->nm_nametimeo = nametimeo;
nmp->nm_negnametimeo = negnametimeo;
nmp->nm_timeo = NFS_TIMEO;
nmp->nm_retry = NFS_RETRANS;
nmp->nm_readahead = NFS_DEFRAHEAD;
/* This is empirical approximation of sqrt(hibufspace) * 256. */
nmp->nm_wcommitsize = NFS_MAXBSIZE / 256;
while ((long)nmp->nm_wcommitsize * nmp->nm_wcommitsize < hibufspace)
nmp->nm_wcommitsize *= 2;
nmp->nm_wcommitsize *= 256;
tryminvers = false;
if ((argp->flags & NFSMNT_NFSV4) != 0) {
if (minvers < 0) {
tryminvers = true;
minvers = NFSV42_MINORVERSION;
}
nmp->nm_minorvers = minvers;
} else
nmp->nm_minorvers = 0;
nfs_decode_args(mp, nmp, argp, hst, 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.
*/
if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0)
nmp->nm_maxfilesize = 0xffffffffLL;
else
nmp->nm_maxfilesize = OFF_MAX;
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_numgrps = NFS_MAXGRPS;
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);
strlcpy(mp->mnt_stat.f_mntfromname, hst, 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, false,
&nmp->nm_sockreq.nr_client)))
goto bad;
/* For NFSv4, get the clientid now. */
if ((argp->flags & NFSMNT_NFSV4) != 0) {
NFSCL_DEBUG(3, "at getcl\n");
error = nfscl_getcl(mp, cred, td, tryminvers, true, &clp);
NFSCL_DEBUG(3, "aft getcl=%d\n", error);
if (error != 0)
goto bad;
if (aconn > 0 && nmp->nm_minorvers == 0) {
vfs_mount_error(mp, "nconnect should only be used "
"for NFSv4.1/4.2 mounts");
error = EINVAL;
goto bad;
}
if (NFSHASSYSKRB5(nmp) && nmp->nm_minorvers == 0) {
vfs_mount_error(mp, "syskrb5 should only be used "
"for NFSv4.1/4.2 mounts");
error = EINVAL;
goto bad;
}
}
if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) &&
nmp->nm_dirpathlen > 0) {
NFSCL_DEBUG(3, "in dirp\n");
/*
* 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);
NFSCL_DEBUG(3, "aft dirp=%d\n", error);
if (error != 0 && (!NFSHASSYSKRB5(nmp) ||
error != NFSERR_WRONGSEC))
(void) nfs_catnap(PZERO, error, "nfsgetdirp");
} while (error != 0 && --trycnt > 0 &&
(!NFSHASSYSKRB5(nmp) || error != NFSERR_WRONGSEC));
if (error != 0 && (!NFSHASSYSKRB5(nmp) ||
error != NFSERR_WRONGSEC))
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 == UFS_ROOTINO (2).
* For the "syskrb5" mount, the file handle might not have
* been acquired. As such, use a "fake" file handle which
* can never be returned by a server for the root vnode.
*/
if (nmp->nm_fhsize > 0 || NFSHASSYSKRB5(nmp)) {
/*
* 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;
if (nmp->nm_fhsize == 0) {
fakefh = malloc(NFSX_FHMAX + 1, M_TEMP, M_WAITOK |
M_ZERO);
error = ncl_nget(mp, fakefh, NFSX_FHMAX + 1, &np,
LK_EXCLUSIVE);
free(fakefh, M_TEMP);
nmp->nm_privflag |= NFSMNTP_FAKEROOTFH;
} else
error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np,
LK_EXCLUSIVE);
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 = ENXIO;
if (nmp->nm_fhsize > 0)
ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh,
nmp->nm_fhsize, 1, cred, td, &nfsva, NULL, &lease);
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;
lease = 20;
}
(void) nfscl_loadattrcache(vpp, &nfsva, NULL, 0, 1);
if ((argp->flags & NFSMNT_NFSV4) != 0) {
NFSCL_DEBUG(3, "lease=%d\n", (int)lease);
NFSLOCKCLSTATE();
clp->nfsc_renew = NFSCL_RENEW(lease);
clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
clp->nfsc_clientidrev++;
if (clp->nfsc_clientidrev == 0)
clp->nfsc_clientidrev++;
NFSUNLOCKCLSTATE();
/*
* Mount will succeed, so the renew thread can be
* started now.
*/
nfscl_start_renewthread(clp);
nfscl_clientrelease(clp);
}
if (argp->flags & NFSMNT_NFSV3)
ncl_fsinfo(nmp, *vpp, cred, td);
/* Mark if the mount point supports NFSv4 ACLs. */
if ((argp->flags & NFSMNT_NFSV4) != 0 && nfsrv_useacl != 0 &&
ret == 0 &&
NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) {
MNT_ILOCK(mp);
mp->mnt_flag |= MNT_NFS4ACLS;
MNT_IUNLOCK(mp);
}
/* Can now allow additional connections. */
if (aconn > 0)
nmp->nm_aconnect = aconn;
/*
* Lose the lock but keep the ref.
*/
NFSVOPUNLOCK(*vpp);
vfs_cache_root_set(mp, *vpp);
return (0);
}
error = EIO;
bad:
if (clp != NULL)
nfscl_clientrelease(clp);
newnfs_disconnect(NULL, &nmp->nm_sockreq);
crfree(nmp->nm_sockreq.nr_cred);
if (nmp->nm_sockreq.nr_auth != NULL)
AUTH_DESTROY(nmp->nm_sockreq.nr_auth);
mtx_destroy(&nmp->nm_sockreq.nr_mtx);
mtx_destroy(&nmp->nm_mtx);
if (nmp->nm_clp != NULL) {
NFSLOCKCLSTATE();
LIST_REMOVE(nmp->nm_clp, nfsc_list);
NFSUNLOCKCLSTATE();
free(nmp->nm_clp, M_NFSCLCLIENT);
}
TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) {
if (dsp != TAILQ_FIRST(&nmp->nm_sess) &&
dsp->nfsclds_sockp != NULL)
newnfs_disconnect(NULL, dsp->nfsclds_sockp);
nfscl_freenfsclds(dsp);
}
free(nmp->nm_tlscertname, M_NEWNFSMNT);
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, i, trycnt = 0;
struct nfsclds *dsp, *tdsp;
struct nfscldeleg *dp, *ndp;
struct nfscldeleghead dh;
td = curthread;
TAILQ_INIT(&dh);
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
nmp = VFSTONFS(mp);
error = 0;
/*
* 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) {
NFSDDSLOCK();
if (nfsv4_findmirror(nmp) != NULL)
error = ENXIO;
NFSDDSUNLOCK();
if (error)
goto out;
error = newnfs_nmcancelreqs(nmp);
if (error)
goto out;
/* For a forced close, get rid of the renew thread now */
nfscl_umount(nmp, td, &dh);
}
/* 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, error, "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, NULL);
else {
mtx_lock(&nmp->nm_mtx);
nmp->nm_privflag |= NFSMNTP_FORCEDISM;
mtx_unlock(&nmp->nm_mtx);
}
/* Make sure no nfsiods are assigned to this mount. */
NFSLOCKIOD();
for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
if (ncl_iodmount[i] == nmp) {
ncl_iodwant[i] = NFSIOD_AVAILABLE;
ncl_iodmount[i] = NULL;
}
NFSUNLOCKIOD();
/*
* We can now set mnt_data to NULL and wait for
* nfssvc(NFSSVC_FORCEDISM) to complete.
*/
mtx_lock(&mountlist_mtx);
mtx_lock(&nmp->nm_mtx);
mp->mnt_data = NULL;
mtx_unlock(&mountlist_mtx);
while ((nmp->nm_privflag & NFSMNTP_CANCELRPCS) != 0)
msleep(nmp, &nmp->nm_mtx, PVFS, "nfsfdism", 0);
mtx_unlock(&nmp->nm_mtx);
newnfs_disconnect(nmp, &nmp->nm_sockreq);
crfree(nmp->nm_sockreq.nr_cred);
free(nmp->nm_nam, M_SONAME);
if (nmp->nm_sockreq.nr_auth != NULL)
AUTH_DESTROY(nmp->nm_sockreq.nr_auth);
mtx_destroy(&nmp->nm_sockreq.nr_mtx);
mtx_destroy(&nmp->nm_mtx);
TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) {
if (dsp != TAILQ_FIRST(&nmp->nm_sess) &&
dsp->nfsclds_sockp != NULL)
newnfs_disconnect(NULL, dsp->nfsclds_sockp);
nfscl_freenfsclds(dsp);
}
free(nmp->nm_tlscertname, M_NEWNFSMNT);
free(nmp, M_NEWNFSMNT);
/* Free up the delegation structures for forced dismounts. */
TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
TAILQ_REMOVE(&dh, dp, nfsdl_list);
free(dp, M_NFSCLDELEG);
}
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;
char *fakefh;
nmp = VFSTONFS(mp);
if ((nmp->nm_privflag & NFSMNTP_FAKEROOTFH) != 0) {
/* Attempt to get the actual root file handle. */
if (nmp->nm_fhsize == 0)
error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp),
curthread->td_ucred, curthread);
fakefh = malloc(NFSX_FHMAX + 1, M_TEMP, M_WAITOK | M_ZERO);
error = ncl_nget(mp, fakefh, NFSX_FHMAX + 1, &np, flags);
free(fakefh, M_TEMP);
} else {
error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, flags);
}
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;
MNT_ILOCK(mp);
/*
* If a forced dismount is in progress, return from here so that
* the umount(2) syscall doesn't get stuck in VFS_SYNC() before
* calling VFS_UNMOUNT().
*/
if (NFSCL_FORCEDISM(mp)) {
MNT_IUNLOCK(mp);
return (EBADF);
}
MNT_IUNLOCK(mp);
if (waitfor == MNT_LAZY)
return (0);
/*
* Force stale buffer cache information to be flushed.
*/
loop:
MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
/* XXX Racy bv_cnt check. */
if (NFSVOPISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0) {
VI_UNLOCK(vp);
continue;
}
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) {
MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
goto loop;
}
error = VOP_FSYNC(vp, waitfor, td);
if (error)
allerror = error;
NFSVOPUNLOCK(vp);
vrele(vp);
}
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);
}
/*
* Purge any RPCs in progress, so that they will all return errors.
* This allows dounmount() to continue as far as VFS_UNMOUNT() for a
* forced dismount.
*/
static void
nfs_purge(struct mount *mp)
{
struct nfsmount *nmp = VFSTONFS(mp);
newnfs_nmcancelreqs(nmp);
}
/*
* Extract the information needed by the nlm from the nfs vnode.
*/
static void
nfs_getnlminfo(struct vnode *vp, uint8_t *fhp, size_t *fhlenp,
struct sockaddr_storage *sp, int *is_v3p, off_t *sizep,
struct timeval *timeop)
{
struct nfsmount *nmp;
struct nfsnode *np = VTONFS(vp);
nmp = VFSTONFS(vp->v_mount);
if (fhlenp != NULL)
*fhlenp = (size_t)np->n_fhp->nfh_len;
if (fhp != NULL)
bcopy(np->n_fhp->nfh_fh, fhp, np->n_fhp->nfh_len);
if (sp != NULL)
bcopy(nmp->nm_nam, sp, min(nmp->nm_nam->sa_len, sizeof(*sp)));
if (is_v3p != NULL)
*is_v3p = NFS_ISV3(vp);
if (sizep != NULL)
*sizep = np->n_size;
if (timeop != NULL) {
timeop->tv_sec = nmp->nm_timeo / NFS_HZ;
timeop->tv_usec = (nmp->nm_timeo % NFS_HZ) * (1000000 / NFS_HZ);
}
}
/*
* This function prints out an option name, based on the conditional
* argument.
*/
static __inline void nfscl_printopt(struct nfsmount *nmp, int testval,
char *opt, char **buf, size_t *blen)
{
int len;
if (testval != 0 && *blen > strlen(opt)) {
len = snprintf(*buf, *blen, "%s", opt);
if (len != strlen(opt))
printf("EEK!!\n");
*buf += len;
*blen -= len;
}
}
/*
* This function printf out an options integer value.
*/
static __inline void nfscl_printoptval(struct nfsmount *nmp, int optval,
char *opt, char **buf, size_t *blen)
{
int len;
if (*blen > strlen(opt) + 1) {
/* Could result in truncated output string. */
len = snprintf(*buf, *blen, "%s=%d", opt, optval);
if (len < *blen) {
*buf += len;
*blen -= len;
}
}
}
/*
* Load the option flags and values into the buffer.
*/
void nfscl_retopts(struct nfsmount *nmp, char *buffer, size_t buflen)
{
char *buf;
size_t blen;
buf = buffer;
blen = buflen;
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV4) != 0, "nfsv4", &buf,
&blen);
if ((nmp->nm_flag & NFSMNT_NFSV4) != 0) {
nfscl_printoptval(nmp, nmp->nm_minorvers, ",minorversion", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_PNFS) != 0, ",pnfs",
&buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_ONEOPENOWN) != 0 &&
nmp->nm_minorvers > 0, ",oneopenown", &buf, &blen);
}
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV3) != 0, "nfsv3", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0,
"nfsv2", &buf, &blen);
nfscl_printopt(nmp, nmp->nm_sotype == SOCK_STREAM, ",tcp", &buf, &blen);
nfscl_printopt(nmp, nmp->nm_sotype != SOCK_STREAM, ",udp", &buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RESVPORT) != 0, ",resvport",
&buf, &blen);
nfscl_printopt(nmp, (nmp->nm_newflag & NFSMNT_TLS) != 0, ",tls", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_newflag & NFSMNT_SYSKRB5) != 0,
",syskrb5", &buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCONN) != 0, ",noconn",
&buf, &blen);
nfscl_printoptval(nmp, nmp->nm_aconnect + 1, ",nconnect", &buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) == 0, ",hard", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) != 0, ",soft", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_INT) != 0, ",intr", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) == 0, ",cto", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) != 0, ",nocto", &buf,
&blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NONCONTIGWR) != 0,
",noncontigwr", &buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) ==
0, ",lockd", &buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOLOCKD) != 0, ",nolockd",
&buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RDIRPLUS) != 0, ",rdirplus",
&buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_KERB) == 0, ",sec=sys",
&buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY |
NFSMNT_PRIVACY)) == NFSMNT_KERB, ",sec=krb5", &buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY |
NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_INTEGRITY), ",sec=krb5i",
&buf, &blen);
nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY |
NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_PRIVACY), ",sec=krb5p",
&buf, &blen);
nfscl_printoptval(nmp, nmp->nm_acdirmin, ",acdirmin", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_acdirmax, ",acdirmax", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_acregmin, ",acregmin", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_acregmax, ",acregmax", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_nametimeo, ",nametimeo", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_negnametimeo, ",negnametimeo", &buf,
&blen);
nfscl_printoptval(nmp, nmp->nm_rsize, ",rsize", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_wsize, ",wsize", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_readdirsize, ",readdirsize", &buf,
&blen);
nfscl_printoptval(nmp, nmp->nm_readahead, ",readahead", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_wcommitsize, ",wcommitsize", &buf,
&blen);
nfscl_printoptval(nmp, nmp->nm_timeo, ",timeout", &buf, &blen);
nfscl_printoptval(nmp, nmp->nm_retry, ",retrans", &buf, &blen);
}
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