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University of Michigan's Citi NFSv4 userland client code.

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Submitted by: Jim Rees <rees@umich.edu>
This commit is contained in:
Alfred Perlstein 2003-11-14 21:04:33 +00:00
parent 64bb257f0b
commit 5d01eeb9e1
6 changed files with 1687 additions and 0 deletions
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14
sbin/idmapd/Makefile Normal file
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# @(#)Makefile 8.2 (Berkeley) 3/27/94
#
# $FreeBSD$
PROG= idmapd
SRCS= idmapd.c
MAN= idmapd.8
CFLAGS+= -DNFS -I/usr/src/sys
WARNS= 2
.PATH:
.include <bsd.prog.mk>

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.\" $FreeBSD$
man

431
sbin/idmapd/idmapd.c Normal file
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/* $FreeBSD$ */
/* $Id: idmapd.c,v 1.5 2003/11/05 14:58:58 rees Exp $ */
/*
* copyright (c) 2003
* the regents of the university of michigan
* all rights reserved
*
* permission is granted to use, copy, create derivative works and redistribute
* this software and such derivative works for any purpose, so long as the name
* of the university of michigan is not used in any advertising or publicity
* pertaining to the use or distribution of this software without specific,
* written prior authorization. if the above copyright notice or any other
* identification of the university of michigan is included in any copy of any
* portion of this software, then the disclaimer below must also be included.
*
* this software is provided as is, without representation from the university
* of michigan as to its fitness for any purpose, and without warranty by the
* university of michigan of any kind, either express or implied, including
* without limitation the implied warranties of merchantability and fitness for
* a particular purpose. the regents of the university of michigan shall not be
* liable for any damages, including special, indirect, incidental, or
* consequential damages, with respect to any claim arising out of or in
* connection with the use of the software, even if it has been or is hereafter
* advised of the possibility of such damages.
*/
/* XXX ignores the domain of recieved names. */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/syscall.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <stdio.h>
#include <fcntl.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include <nfs4client/nfs4_dev.h>
#include <nfs4client/nfs4_idmap.h>
/* #include "idmap.h" */
#define DEV_PATH "/dev/nfs4"
#define DOMAIN "@citi.umich.edu"
#define BADUSER "nobody"
#define BADGROUP "nogroup"
#define BADUID (-2)
#define BADGID (-2)
struct idmap_e {
struct nfs4dev_msg msg;
TAILQ_ENTRY(idmap_e) next;
};
int fd, verbose;
char *domain = DOMAIN;
TAILQ_HEAD(, idmap_e) upcall_q;
#define add_idmap_e(E) do { \
assert(E != NULL); \
TAILQ_INSERT_TAIL(&upcall_q, E, next); \
} while(0)
#define remove_idmap_e(E) do { \
assert(E != NULL && !TAILQ_EMPTY(&upcall_q)); \
E = TAILQ_FIRST(&upcall_q); \
TAILQ_REMOVE(&upcall_q, E, next); \
} while(0)
#define get_idmap_e(E) do { \
if ((E = (struct idmap_e *) malloc(sizeof(struct idmap_e))) == NULL) {\
fprintf(stderr, "get_idmap_e(): error in malloc\n");\
} } while(0)
#define put_idmap_e(E) free(E)
/* from marius */
int
validateascii(char *string, u_int32_t len)
{
int i;
for (i = 0; i < len; i++) {
if (string[i] == '\0')
break;
if (string[i] & 0x80)
return (-1);
}
if (string[i] != '\0')
return (-1);
return (i + 1);
}
char *
idmap_prune_domain(struct idmap_msg * m)
{
size_t i;
size_t len;
char * ret = NULL;
if (m == NULL)
return NULL;
len = m->id_namelen;
if (validateascii(m->id_name, len) < 0) {
fprintf(stderr, "msg has invalid ascii\n");
return NULL;
}
for (i=0; i < len && m->id_name[i] != '@' ; i++);
ret = (char *)malloc(i+1);
if (ret == NULL)
return NULL;
bcopy(m->id_name, ret, i);
ret[i] = '\0';
return ret;
}
int
idmap_add_domain(struct idmap_msg * m, char * name)
{
size_t len, nlen;
if (m == NULL || name == NULL)
return -1;
len = strlen(name);
nlen = len + strlen(domain);
if (nlen > IDMAP_MAXNAMELEN)
return -1;
bcopy(name, &m->id_name[0], len);
bcopy(domain, &m->id_name[len], strlen(domain));
m->id_name[nlen] = '\0';
m->id_namelen = nlen;
return 0;
}
int
idmap_name(struct idmap_msg * m, char *name)
{
if (m == NULL || name == NULL || m->id_namelen != 0)
return -1;
if (idmap_add_domain(m, name))
return -1;
return 0;
}
int
idmap_id(struct idmap_msg * m, ident_t id)
{
if (m == NULL || m->id_namelen == 0) {
fprintf(stderr, "idmap_id: bad msg\n");
return -1;
}
switch(m->id_type) {
case IDMAP_TYPE_UID:
m->id_id.uid = id.uid;
break;
case IDMAP_TYPE_GID:
m->id_id.gid = id.gid;
break;
default:
return -1;
break;
};
return 0;
}
int
idmap_service(struct idmap_e * e)
{
struct idmap_msg * m;
struct passwd * pwd;
struct group * grp;
ident_t id;
char * name;
if (e == NULL) {
fprintf(stderr, "bad entry\n");
return -1;
}
if (e->msg.msg_vers != NFS4DEV_VERSION) {
fprintf(stderr, "kernel/userland version mismatch! %d/%d\n",
e->msg.msg_vers, NFS4DEV_VERSION);
return -1;
}
if (e->msg.msg_type != NFS4DEV_TYPE_IDMAP) {
fprintf(stderr, "bad type!\n");
return -1;
}
if (e->msg.msg_len != sizeof(struct idmap_msg)) {
fprintf(stderr, "bad message length: %d/%d\n", e->msg.msg_len,
sizeof(struct idmap_msg));
return -1;
}
if (verbose)
printf("servicing msg xid: %x\n", e->msg.msg_xid);
m = (struct idmap_msg *)e->msg.msg_data;
if (m->id_namelen != 0 && m->id_namelen != strlen(m->id_name)) {
fprintf(stderr, "bad name length in idmap_msg\n");
return -1;
}
switch (m->id_type) {
case IDMAP_TYPE_UID:
if (m->id_namelen == 0) {
/* id to name */
pwd = getpwuid(m->id_id.uid);
if (pwd == NULL) {
fprintf(stderr, "unknown uid %d!\n",
(uint32_t)m->id_id.uid);
name = BADUSER;
} else
name = pwd->pw_name;
if (idmap_name(m, name))
return -1;
} else {
/* name to id */
name = idmap_prune_domain(m);
if (name == NULL)
return -1;
pwd = getpwnam(name);
if (pwd == NULL) {
fprintf(stderr, "unknown username %s!\n", name);
id.uid = (uid_t)BADUID;
} else
id.uid = pwd->pw_uid;
free(name);
if (idmap_id(m, id))
return -1;
}
break;
case IDMAP_TYPE_GID:
if (m->id_namelen == 0) {
/* id to name */
grp = getgrgid(m->id_id.gid);
if (grp == NULL) {
fprintf(stderr, "unknown gid %d!\n",
(uint32_t)m->id_id.gid);
name = BADGROUP;
} else
name = grp->gr_name;
if (idmap_name(m, name))
return -1;
} else {
/* name to id */
name = idmap_prune_domain(m);
if (name == NULL)
return -1;
grp = getgrnam(name);
if (grp == NULL) {
fprintf(stderr, "unknown groupname %s!\n", name);
id.gid = (gid_t)BADGID;
} else
id.gid = grp->gr_gid;
free(name);
if (idmap_id(m, id))
return -1;
}
break;
default:
fprintf(stderr, "bad idmap type: %d\n", m->id_type);
return -1;
break;
}
return 0;
}
int
main(int argc, char ** argv)
{
int error = 0;
struct idmap_e * entry;
fd_set read_fds, write_fds;
int maxfd;
int ret, ch;
while ((ch = getopt(argc, argv, "d:v")) != -1) {
switch (ch) {
case 'd':
domain = optarg;
break;
case 'v':
verbose = 1;
break;
default:
fprintf(stderr, "usage: %s [-v] [-d domain]\n", argv[0]);
exit(1);
break;
}
}
TAILQ_INIT(&upcall_q);
if (error) {
perror("sigaction");
exit(1);
}
fd = open(DEV_PATH, O_RDWR, S_IRUSR | S_IWUSR);
if (fd < 0) {
perror(DEV_PATH);
exit(1);
}
if (!verbose)
daemon(0,0);
if (verbose)
printf("sizeof nfs4dev_msg: %d\n", sizeof(struct nfs4dev_msg));
maxfd = fd;
for (;;) {
struct timeval timo = {1, 0};
do {
FD_ZERO(&read_fds);
FD_ZERO(&write_fds);
FD_SET(fd, &read_fds);
FD_SET(fd, &write_fds);
ret = select(maxfd+1, &read_fds, &write_fds, NULL, &timo);
} while (ret < 0 && errno == EINTR);
if (ret <= 0) {
if (ret != 0)
perror("select");
continue;
}
if (FD_ISSET(fd, &read_fds)) {
for (;;) {
get_idmap_e(entry);
error = ioctl(fd, NFS4DEVIOCGET, &entry->msg);
if (error == -1) {
if (errno != EAGAIN)
perror("get ioctl:");
put_idmap_e(entry);
break;
}
switch (entry->msg.msg_type ) {
case NFS4DEV_TYPE_IDMAP:
if (idmap_service(entry))
entry->msg.msg_error = EIO;
break;
default:
fprintf(stderr, "unknown nfs4dev_msg type\n");
entry->msg.msg_error = EIO;
break;
}
add_idmap_e(entry);
}
}
if (FD_ISSET(fd, &write_fds)) {
while (!TAILQ_EMPTY(&upcall_q)) {
remove_idmap_e(entry);
error = ioctl(fd, NFS4DEVIOCPUT, &entry->msg);
if (error == -1) {
if (errno != EAGAIN)
perror("put ioctl");
break;
}
put_idmap_e(entry);
}
}
}
/* never reached */
exit(1);
}

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# ${.CURDIR}(#)Makefile 8.2 (Berkeley) 3/27/94
#
# $FreeBSD$
PROG= mount_nfs4
SRCS= mount_nfs4.c getmntopts.c mounttab.c
MAN= mount_nfs4.8
MOUNT= ${.CURDIR}/../mount
UMNTALL= ${.CURDIR}/../../usr.sbin/rpc.umntall
CFLAGS+= -DNFS -I${MOUNT} -I${UMNTALL}
WARNS= 2
.PATH: ${MOUNT} ${UMNTALL}
.include <bsd.prog.mk>

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sbin/mount_nfs4/mount_nfs4.8 Normal file
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.\" Copyright (c) 1992, 1993, 1994, 1995
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)mount_nfs.8 8.3 (Berkeley) 3/29/95
.\" $FreeBSD$
.\"
.Dd May 11, 2003
.Dt MOUNT_NFS 8
.Os
.Sh NAME
.Nm mount_nfs
.Nd mount NFS file systems
.Sh SYNOPSIS
.Nm
.Op Fl 23NPTUbcdiLls
.Op Fl D Ar deadthresh
.Op Fl I Ar readdirsize
.Op Fl R Ar retrycnt
.Op Fl a Ar maxreadahead
.Op Fl g Ar maxgroups
.Op Fl o Ar options
.Op Fl r Ar readsize
.Op Fl t Ar timeout
.Op Fl w Ar writesize
.Op Fl x Ar retrans
.Ar rhost : Ns Ar path node
.Sh DESCRIPTION
The
.Nm
utility calls the
.Xr mount 2
system call to prepare and graft a remote NFS file system
.Pq Ar rhost : Ns Ar path
on to the file system tree at the point
.Ar node .
This command is normally executed by
.Xr mount 8 .
It implements the mount protocol as described in RFC 1094, Appendix A and
.%T "NFS: Network File System Version 3 Protocol Specification" ,
Appendix I.
.Pp
By default,
.Nm
keeps retrying until the mount succeeds.
This behaviour is intended for file systems listed in
.Xr fstab 5
that are critical to the boot process.
For non-critical file systems, the
.Fl b
and
.Fl R
flags provide mechanisms to prevent the boot process from hanging
if the server is unavailable.
.Pp
If the server becomes unresponsive while an NFS file system is
mounted, any new or outstanding file operations on that file system
will hang uninterruptibly until the server comes back.
To modify this default behaviour, see the
.Fl i
and
.Fl s
flags.
.Pp
The options are:
.Bl -tag -width indent
.It Fl 2
Use the NFS Version 2 protocol (the default is to try version 3 first
then version 2).
Note that NFS version 2 has a file size limit of 2 gigabytes.
.It Fl 3
Use the NFS Version 3 protocol.
.It Fl D
Set the
.Dq "dead server threshold"
to the specified number of round trip timeout intervals before a
.Dq "server not responding"
message is displayed.
.It Fl I
Set the readdir read size to the specified value.
The value should normally
be a multiple of
.Dv DIRBLKSIZ
that is <= the read size for the mount.
.It Fl L
Do
.Em not
forward
.Xr fcntl 2
locks over the wire.
All locks will be local and not seen by the server
and likewise not seen by other NFS clients.
This removes the need to run the
.Xr rpcbind 8
service and the
.Xr rpc.statd 8
and
.Xr rpc.lockd 8
servers on the client.
Note that this option will only be honored when performing the
initial mount, it will be silently ignored if used while updating
the mount options.
.It Fl N
Do
.Em not
use a reserved socket port number (see below).
.It Fl P
Use a reserved socket port number.
This flag is obsolete, and only retained for compatibility reasons.
Reserved port numbers are used by default now.
(For the rare case where the client has a trusted root account
but untrustworthy users and the network cables are in secure areas this does
help, but for normal desktop clients this does not apply.)
.It Fl R
Set the mount retry count to the specified value.
The default is a retry count of zero, which means to keep retrying
forever.
There is a 60 second delay between each attempt.
.It Fl T
Use TCP transport instead of UDP.
This is recommended for servers that are not on the same LAN cable as
the client.
(NB: This is NOT supported by most
.No non- Ns Bx
servers.)
.It Fl U
Force the mount protocol to use UDP transport, even for TCP NFS mounts.
(Necessary for some old
.Bx
servers.)
.It Fl a
Set the read-ahead count to the specified value.
This may be in the range of 0 - 4, and determines how many blocks
will be read ahead when a large file is being read sequentially.
Trying a value greater than 1 for this is suggested for
mounts with a large bandwidth * delay product.
.It Fl b
If an initial attempt to contact the server fails, fork off a child to keep
trying the mount in the background.
Useful for
.Xr fstab 5 ,
where the file system mount is not critical to multiuser operation.
.It Fl c
For UDP mount points, do not do a
.Xr connect 2 .
This must be used if the server does not reply to requests from the standard
NFS port number 2049 or replies to requests using a different IP address
(which can occur if the server is multi-homed).
Setting the
.Va vfs.nfs.nfs_ip_paranoia
sysctl to 0 will make this option the default.
.It Fl d
Turn off the dynamic retransmit timeout estimator.
This may be useful for UDP mounts that exhibit high retry rates,
since it is possible that the dynamically estimated timeout interval is too
short.
.It Fl g
Set the maximum size of the group list for the credentials to the
specified value.
This should be used for mounts on old servers that cannot handle a
group list size of 16, as specified in RFC 1057.
Try 8, if users in a lot of groups cannot get response from the mount
point.
.It Fl i
Make the mount interruptible, which implies that file system calls that
are delayed due to an unresponsive server will fail with EINTR when a
termination signal is posted for the process.
.It Fl l
Used with NQNFS and NFSV3 to specify that the \fBReaddirPlus\fR RPC should
be used.
This option reduces RPC traffic for cases such as
.Dq "ls -l" ,
but tends to flood the attribute and name caches with prefetched entries.
Try this option and see whether performance improves or degrades.
Probably
most useful for client to server network interconnects with a large bandwidth
times delay product.
.It Fl o
Options are specified with a
.Fl o
flag followed by a comma separated string of options.
See the
.Xr mount 8
man page for possible options and their meanings.
The following NFS specific options are also available:
.Bl -tag -width indent
.It Cm port Ns = Ns Aq Ar port_number
Use specified port number for NFS requests.
The default is to query the portmapper for the NFS port.
.It Cm acregmin Ns = Ns Aq Ar seconds
.It Cm acregmax Ns = Ns Aq Ar seconds
.It Cm acdirmin Ns = Ns Aq Ar seconds
.It Cm acdirmax Ns = Ns Aq Ar seconds
When attributes of files are cached, a timeout calculated to determine
whether a given cache entry has expired.
These four values determine the upper and lower bounds of the timeouts for
.Dq directory
attributes and
.Dq regular
(ie: everything else).
The default values are 3 -> 60 seconds
for regular files, and 30 -> 60 seconds for directories.
The algorithm to calculate the timeout is based on the age of the file.
The older the file,
the longer the cache is considered valid, subject to the limits above.
.It Cm noinet4 , noinet6
Disables
.Dv AF_INET
or
.Dv AF_INET6
connections.
Useful for hosts that have
both an A record and an AAAA record for the same name.
.El
.Bl -tag -width ".Cm dumbtimer"
.Ss Historic Fl o Ss Options
Use of these options is deprecated, they are only mentioned here for
compatibility with historic versions of
.Nm .
.It Cm bg
Same as
.Fl b .
.It Cm conn
Same as not specifying
.Fl c .
.It Cm dumbtimer
Same as
.Fl d .
.It Cm intr
Same as
.Fl i .
.It Cm lockd
Same as not specifying
.Fl L .
.It Cm nfsv2
Same as
.Fl 2 .
.It Cm nfsv3
Same as
.Fl 3 .
.It Cm rdirplus
Same as
.Fl l .
.It Cm mntudp
Same as
.Fl U .
.It Cm resvport
Same as
.Fl P .
.It Cm soft
Same as
.Fl s .
.It Cm tcp
Same as
.Fl T .
.El
.It Fl r
Set the read data size to the specified value.
It should normally be a power of 2 greater than or equal to 1024.
This should be used for UDP mounts when the
.Dq "fragments dropped due to timeout"
value is getting large while actively using a mount point.
(Use
.Xr netstat 1
with the
.Fl s
option to see what the
.Dq "fragments dropped due to timeout"
value is.)
See the
.Fl w
option as well.
.It Fl s
A soft mount, which implies that file system calls will fail
after
.Ar retrycnt
round trip timeout intervals.
.It Fl t
Set the initial retransmit timeout to the specified value.
May be useful for fine tuning UDP mounts over internetworks
with high packet loss rates or an overloaded server.
Try increasing the interval if
.Xr nfsstat 1
shows high retransmit rates while the file system is active or reducing the
value if there is a low retransmit rate but long response delay observed.
(Normally, the
.Fl d
option should be specified when using this option to manually
tune the timeout
interval.)
.It Fl w
Set the write data size to the specified value.
Ditto the comments w.r.t. the
.Fl r
option, but using the
.Dq "fragments dropped due to timeout"
value on the server instead of the client.
Note that both the
.Fl r
and
.Fl w
options should only be used as a last ditch effort at improving performance
when mounting servers that do not support TCP mounts.
.It Fl x
Set the retransmit timeout count for soft mounts to the specified value.
.El
.Sh SEE ALSO
.Xr mount 2 ,
.Xr unmount 2 ,
.Xr fstab 5 ,
.Xr mount 8 ,
.Xr nfsd 8 ,
.Xr nfsiod 8 ,
.Xr showmount 8
.Sh BUGS
Due to the way that Sun RPC is implemented on top of UDP (unreliable datagram)
transport, tuning such mounts is really a black art that can only be expected
to have limited success.
For clients mounting servers that are not on the same
LAN cable or that tend to be overloaded,
TCP transport is strongly recommended,
but unfortunately this is restricted to mostly
.Bx 4.4
servers.

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/* $FreeBSD$ */
/* $Id: mount_nfs.c,v 1.5 2003/11/05 14:58:58 rees Exp $ */
/*
* copyright (c) 2003
* the regents of the university of michigan
* all rights reserved
*
* permission is granted to use, copy, create derivative works and redistribute
* this software and such derivative works for any purpose, so long as the name
* of the university of michigan is not used in any advertising or publicity
* pertaining to the use or distribution of this software without specific,
* written prior authorization. if the above copyright notice or any other
* identification of the university of michigan is included in any copy of any
* portion of this software, then the disclaimer below must also be included.
*
* this software is provided as is, without representation from the university
* of michigan as to its fitness for any purpose, and without warranty by the
* university of michigan of any kind, either express or implied, including
* without limitation the implied warranties of merchantability and fitness for
* a particular purpose. the regents of the university of michigan shall not be
* liable for any damages, including special, indirect, incidental, or
* consequential damages, with respect to any claim arising out of or in
* connection with the use of the software, even if it has been or is hereafter
* advised of the possibility of such damages.
*/
/*
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfsclient/nfs.h>
#include <nfsclient/nfsargs.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sysexits.h>
#include <unistd.h>
#include "mntopts.h"
#include "mounttab.h"
#define ALTF_BG 0x1
#define ALTF_NOCONN 0x2
#define ALTF_DUMBTIMR 0x4
#define ALTF_INTR 0x8
#define ALTF_NFSV3 0x20
#define ALTF_RDIRPLUS 0x40
#define ALTF_MNTUDP 0x80
#define ALTF_RESVPORT 0x100
#define ALTF_SEQPACKET 0x200
#define ALTF_SOFT 0x800
#define ALTF_TCP 0x1000
#define ALTF_PORT 0x2000
#define ALTF_NFSV2 0x4000
#define ALTF_ACREGMIN 0x8000
#define ALTF_ACREGMAX 0x10000
#define ALTF_ACDIRMIN 0x20000
#define ALTF_ACDIRMAX 0x40000
#define ALTF_NOLOCKD 0x80000
#define ALTF_NOINET4 0x100000
#define ALTF_NOINET6 0x200000
struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_FORCE,
MOPT_UPDATE,
MOPT_ASYNC,
{ "bg", 0, ALTF_BG, 1 },
{ "conn", 1, ALTF_NOCONN, 1 },
{ "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
{ "intr", 0, ALTF_INTR, 1 },
{ "nfsv3", 0, ALTF_NFSV3, 1 },
{ "rdirplus", 0, ALTF_RDIRPLUS, 1 },
{ "mntudp", 0, ALTF_MNTUDP, 1 },
{ "resvport", 0, ALTF_RESVPORT, 1 },
{ "soft", 0, ALTF_SOFT, 1 },
{ "tcp", 0, ALTF_TCP, 1 },
{ "port=", 0, ALTF_PORT, 1 },
{ "nfsv2", 0, ALTF_NFSV2, 1 },
{ "acregmin=", 0, ALTF_ACREGMIN, 1 },
{ "acregmax=", 0, ALTF_ACREGMAX, 1 },
{ "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
{ "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
{ "lockd", 1, ALTF_NOLOCKD, 1 },
{ "inet4", 1, ALTF_NOINET4, 1 },
{ "inet6", 1, ALTF_NOINET6, 1 },
{ NULL }
};
struct nfs_args nfsdefargs = {
NFS_ARGSVERSION,
NULL,
sizeof (struct sockaddr_in),
SOCK_STREAM,
0,
NULL,
0,
NFSMNT_RESVPORT,
NFS_WSIZE,
NFS_RSIZE,
NFS_READDIRSIZE,
10,
NFS_RETRANS,
NFS_MAXGRPS,
NFS_DEFRAHEAD,
0, /* was: NQ_DEFLEASE */
NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */
NULL,
/* args version 4 */
NFS_MINATTRTIMO,
NFS_MAXATTRTIMO,
NFS_MINDIRATTRTIMO,
NFS_MAXDIRATTRTIMO,
};
/* Table for af,sotype -> netid conversions. */
struct nc_protos {
char *netid;
int af;
int sotype;
} nc_protos[] = {
{"udp", AF_INET, SOCK_DGRAM},
{"tcp", AF_INET, SOCK_STREAM},
{"udp6", AF_INET6, SOCK_DGRAM},
{"tcp6", AF_INET6, SOCK_STREAM},
{NULL}
};
struct nfhret {
u_long stat;
long vers;
long auth;
long fhsize;
u_char nfh[NFSX_V3FHMAX];
};
#define BGRND 1
#define ISBGRND 2
#define OF_NOINET4 4
#define OF_NOINET6 8
int retrycnt = -1;
int opflags = 0;
int nfsproto = IPPROTO_TCP;
char *portspec = "2049"; /* Server nfs port; "0" means look up via rpcbind. */
enum mountmode {
ANY,
V2,
V3
} mountmode = ANY;
/* Return codes for nfs_tryproto. */
enum tryret {
TRYRET_SUCCESS,
TRYRET_TIMEOUT, /* No response received. */
TRYRET_REMOTEERR, /* Error received from remote server. */
TRYRET_LOCALERR /* Local failure. */
};
int getnfsargs(char *, struct nfs_args *);
/* void set_rpc_maxgrouplist(int); */
struct netconfig *getnetconf_cached(const char *netid);
char *netidbytype(int af, int sotype);
void usage(void) __dead2;
int xdr_dir(XDR *, char *);
int xdr_fh(XDR *, struct nfhret *);
enum tryret nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai,
char *hostp, char *spec, char **errstr);
enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr);
/*
* Used to set mount flags with getmntopts. Call with dir=TRUE to
* initialize altflags from the current mount flags. Call with
* dir=FALSE to update mount flags with the new value of altflags after
* the call to getmntopts.
*/
static void
set_flags(int* altflags, int* nfsflags, int dir)
{
#define F2(af, nf) \
if (dir) { \
if (*nfsflags & NFSMNT_##nf) \
*altflags |= ALTF_##af; \
else \
*altflags &= ~ALTF_##af; \
} else { \
if (*altflags & ALTF_##af) \
*nfsflags |= NFSMNT_##nf; \
else \
*nfsflags &= ~NFSMNT_##nf; \
}
#define F(f) F2(f,f)
F(NOCONN);
F(DUMBTIMR);
F2(INTR, INT);
F(RDIRPLUS);
F(RESVPORT);
F(SOFT);
F(ACREGMIN);
F(ACREGMAX);
F(ACDIRMIN);
F(ACDIRMAX);
F(NOLOCKD);
#undef F
#undef F2
}
int
main(argc, argv)
int argc;
char *argv[];
{
int c;
struct nfs_args *nfsargsp;
struct nfs_args nfsargs;
int mntflags, altflags, num;
char *name, *p, *spec;
char mntpath[MAXPATHLEN];
mntflags = 0;
altflags = 0;
nfsargs = nfsdefargs;
nfsargsp = &nfsargs;
while ((c = getopt(argc, argv,
"23a:bcdD:g:I:iLl:No:PR:r:sTt:w:x:U")) != -1)
switch (c) {
case '2':
mountmode = V2;
break;
case '3':
mountmode = V3;
break;
case 'a':
num = strtol(optarg, &p, 10);
if (*p || num < 0)
errx(1, "illegal -a value -- %s", optarg);
nfsargsp->readahead = num;
nfsargsp->flags |= NFSMNT_READAHEAD;
break;
case 'b':
opflags |= BGRND;
break;
case 'c':
nfsargsp->flags |= NFSMNT_NOCONN;
break;
case 'D':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -D value -- %s", optarg);
nfsargsp->deadthresh = num;
nfsargsp->flags |= NFSMNT_DEADTHRESH;
break;
case 'd':
nfsargsp->flags |= NFSMNT_DUMBTIMR;
break;
#if 0 /* XXXX */
case 'g':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -g value -- %s", optarg);
set_rpc_maxgrouplist(num);
nfsargsp->maxgrouplist = num;
nfsargsp->flags |= NFSMNT_MAXGRPS;
break;
#endif
case 'I':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -I value -- %s", optarg);
nfsargsp->readdirsize = num;
nfsargsp->flags |= NFSMNT_READDIRSIZE;
break;
case 'i':
nfsargsp->flags |= NFSMNT_INT;
break;
case 'L':
nfsargsp->flags |= NFSMNT_NOLOCKD;
break;
case 'l':
nfsargsp->flags |= NFSMNT_RDIRPLUS;
break;
case 'N':
nfsargsp->flags &= ~NFSMNT_RESVPORT;
break;
case 'o':
altflags = 0;
set_flags(&altflags, &nfsargsp->flags, TRUE);
if (mountmode == V2)
altflags |= ALTF_NFSV2;
else if (mountmode == V3)
altflags |= ALTF_NFSV3;
getmntopts(optarg, mopts, &mntflags, &altflags);
set_flags(&altflags, &nfsargsp->flags, FALSE);
/*
* Handle altflags which don't map directly to
* mount flags.
*/
if (altflags & ALTF_BG)
opflags |= BGRND;
if (altflags & ALTF_NOINET4)
opflags |= OF_NOINET4;
if (altflags & ALTF_NOINET6)
opflags |= OF_NOINET6;
if (altflags & ALTF_MNTUDP) {
nfsargsp->sotype = SOCK_DGRAM;
nfsproto = IPPROTO_UDP;
}
if (altflags & ALTF_PORT) {
/*
* XXX Converting from a string to an int
* and back again is silly, and we should
* allow /etc/services names.
*/
p = strstr(optarg, "port=");
if (p) {
asprintf(&portspec, "%d",
atoi(p + 5));
if (portspec == NULL)
err(1, "asprintf");
}
}
mountmode = ANY;
if (altflags & ALTF_NFSV2)
mountmode = V2;
if (altflags & ALTF_NFSV3)
mountmode = V3;
if (altflags & ALTF_ACREGMIN) {
p = strstr(optarg, "acregmin=");
if (p)
nfsargsp->acregmin = atoi(p + 9);
}
if (altflags & ALTF_ACREGMAX) {
p = strstr(optarg, "acregmax=");
if (p)
nfsargsp->acregmax = atoi(p + 9);
}
if (altflags & ALTF_ACDIRMIN) {
p = strstr(optarg, "acdirmin=");
if (p)
nfsargsp->acdirmin = atoi(p + 9);
}
if (altflags & ALTF_ACDIRMAX) {
p = strstr(optarg, "acdirmax=");
if (p)
nfsargsp->acdirmax = atoi(p + 9);
}
break;
case 'P':
/* obsolete for NFSMNT_RESVPORT, now default */
break;
case 'R':
num = strtol(optarg, &p, 10);
if (*p || num < 0)
errx(1, "illegal -R value -- %s", optarg);
retrycnt = num;
break;
case 'r':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -r value -- %s", optarg);
nfsargsp->rsize = num;
nfsargsp->flags |= NFSMNT_RSIZE;
break;
case 's':
nfsargsp->flags |= NFSMNT_SOFT;
break;
case 'T':
nfsargsp->sotype = SOCK_STREAM;
nfsproto = IPPROTO_TCP;
break;
case 't':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -t value -- %s", optarg);
nfsargsp->timeo = num;
nfsargsp->flags |= NFSMNT_TIMEO;
break;
case 'w':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -w value -- %s", optarg);
nfsargsp->wsize = num;
nfsargsp->flags |= NFSMNT_WSIZE;
break;
case 'x':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -x value -- %s", optarg);
nfsargsp->retrans = num;
nfsargsp->flags |= NFSMNT_RETRANS;
break;
case 'U':
nfsargsp->sotype = SOCK_DGRAM;
nfsproto = IPPROTO_UDP;
break;
default:
usage();
break;
}
argc -= optind;
argv += optind;
if (argc != 2) {
usage();
/* NOTREACHED */
}
spec = *argv++;
name = *argv;
if (retrycnt == -1)
/* The default is to keep retrying forever. */
retrycnt = 0;
if (!getnfsargs(spec, nfsargsp))
exit(1);
/* resolve the mountpoint with realpath(3) */
(void)checkpath(name, mntpath);
if (mount("nfs4", mntpath, mntflags, nfsargsp))
err(1, "%s", mntpath);
exit(0);
}
int
getnfsargs(spec, nfsargsp)
char *spec;
struct nfs_args *nfsargsp;
{
struct addrinfo hints, *ai_nfs, *ai;
enum tryret ret;
int ecode, speclen, remoteerr;
char *hostp, *delimp, *errstr;
size_t len;
static char nam[MNAMELEN + 1];
if ((delimp = strrchr(spec, ':')) != NULL) {
hostp = spec;
spec = delimp + 1;
} else if ((delimp = strrchr(spec, '@')) != NULL) {
warnx("path@server syntax is deprecated, use server:path");
hostp = delimp + 1;
} else {
warnx("no <host>:<dirpath> nfs-name");
return (0);
}
*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) {
warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
return (0);
}
/* Make both '@' and ':' notations equal */
if (*hostp != '\0') {
len = strlen(hostp);
memmove(nam, hostp, len);
nam[len] = ':';
memmove(nam + len + 1, spec, speclen);
nam[len + speclen + 1] = '\0';
}
/*
* Handle an internet host address.
*/
memset(&hints, 0, sizeof hints);
hints.ai_flags = AI_NUMERICHOST;
hints.ai_socktype = nfsargsp->sotype;
if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
hints.ai_flags = 0;
if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
!= 0) {
if (portspec == NULL)
errx(1, "%s: %s", hostp, gai_strerror(ecode));
else
errx(1, "%s:%s: %s", hostp, portspec,
gai_strerror(ecode));
return (0);
}
}
ret = TRYRET_LOCALERR;
for (;;) {
/*
* Try each entry returned by getaddrinfo(). Note the
* occurence of remote errors by setting `remoteerr'.
*/
remoteerr = 0;
for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
if ((ai->ai_family == AF_INET6) &&
(opflags & OF_NOINET6))
continue;
if ((ai->ai_family == AF_INET) &&
(opflags & OF_NOINET4))
continue;
ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr);
if (ret == TRYRET_SUCCESS)
break;
if (ret != TRYRET_LOCALERR)
remoteerr = 1;
if ((opflags & ISBGRND) == 0)
fprintf(stderr, "%s\n", errstr);
}
if (ret == TRYRET_SUCCESS)
break;
/* Exit if all errors were local. */
if (!remoteerr)
exit(1);
/*
* If retrycnt == 0, we are to keep retrying forever.
* Otherwise decrement it, and exit if it hits zero.
*/
if (retrycnt != 0 && --retrycnt == 0)
exit(1);
if ((opflags & (BGRND | ISBGRND)) == BGRND) {
warnx("Cannot immediately mount %s:%s, backgrounding",
hostp, spec);
opflags |= ISBGRND;
if (daemon(0, 0) != 0)
err(1, "daemon");
}
sleep(60);
}
freeaddrinfo(ai_nfs);
nfsargsp->hostname = nam;
/* Add mounted file system to PATH_MOUNTTAB */
if (!add_mtab(hostp, spec))
warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
return (1);
}
/*
* Try to set up the NFS arguments according to the address
* family, protocol (and possibly port) specified in `ai'.
*
* Returns TRYRET_SUCCESS if successful, or:
* TRYRET_TIMEOUT The server did not respond.
* TRYRET_REMOTEERR The server reported an error.
* TRYRET_LOCALERR Local failure.
*
* In all error cases, *errstr will be set to a statically-allocated string
* describing the error.
*/
enum tryret
nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp,
char *spec, char **errstr)
{
static char errbuf[256];
struct sockaddr_storage nfs_ss;
struct netbuf nfs_nb;
struct netconfig *nconf;
char *netid;
int nfsvers;
errbuf[0] = '\0';
*errstr = errbuf;
if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) {
snprintf(errbuf, sizeof errbuf,
"af %d sotype %d not supported", ai->ai_family,
nfsargsp->sotype);
return (TRYRET_LOCALERR);
}
if ((nconf = getnetconf_cached(netid)) == NULL) {
snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
return (TRYRET_LOCALERR);
}
nfsvers = 4;
if (portspec != NULL && atoi(portspec) != 0) {
/* `ai' contains the complete nfsd sockaddr. */
nfs_nb.buf = ai->ai_addr;
nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
} else {
/* Ask the remote rpcbind. */
nfs_nb.buf = &nfs_ss;
nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb,
hostp)) {
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
netid, hostp, spec,
clnt_spcreateerror("RPCPROG_NFS"));
return (returncode(rpc_createerr.cf_stat,
&rpc_createerr.cf_error));
}
}
#if 0
/* Check that the server (nfsd) responds on the port we have chosen. */
clp = clnt_tli_create(RPC_ANYFD, nconf, &nfs_nb, RPCPROG_NFS, nfsvers,
0, 0);
if (clp == NULL) {
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
hostp, spec, clnt_spcreateerror("nfsd: RPCPROG_NFS"));
return (returncode(rpc_createerr.cf_stat,
&rpc_createerr.cf_error));
}
if (nfsargsp->sotype == SOCK_DGRAM &&
!(nfsargsp->flags & NFSMNT_NOCONN)) {
/*
* Use connect(), to match what the kernel does. This
* catches cases where the server responds from the
* wrong source address.
*/
doconnect = 1;
if (!clnt_control(clp, CLSET_CONNECT, (char *)&doconnect)) {
clnt_destroy(clp);
snprintf(errbuf, sizeof errbuf,
"[%s] %s:%s: CLSET_CONNECT failed", netid, hostp,
spec);
return (TRYRET_LOCALERR);
}
}
try.tv_sec = 10;
try.tv_usec = 0;
stat = clnt_call(clp, NFSPROC_NULL, (xdrproc_t)xdr_void, NULL,
(xdrproc_t)xdr_void, NULL, try);
if (stat != RPC_SUCCESS) {
clnt_geterr(clp, &rpcerr);
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid,
hostp, spec, clnt_sperror(clp, "NFSPROC_NULL"));
clnt_destroy(clp);
return (returncode(stat, &rpcerr));
}
clnt_destroy(clp);
#endif
/*
* Store the filehandle and server address in nfsargsp, making
* sure to copy any locally allocated structures.
*/
nfsargsp->addrlen = nfs_nb.len;
nfsargsp->addr = malloc(nfsargsp->addrlen);
if (nfsargsp->addr == NULL)
err(1, "malloc");
bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen);
/* XXX hack */
nfsargsp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
return (TRYRET_SUCCESS);
}
/*
* Catagorise a RPC return status and error into an `enum tryret'
* return code.
*/
enum tryret
returncode(enum clnt_stat stat, struct rpc_err *rpcerr)
{
switch (stat) {
case RPC_TIMEDOUT:
return (TRYRET_TIMEOUT);
case RPC_PMAPFAILURE:
case RPC_PROGNOTREGISTERED:
case RPC_PROGVERSMISMATCH:
/* XXX, these can be local or remote. */
case RPC_CANTSEND:
case RPC_CANTRECV:
return (TRYRET_REMOTEERR);
case RPC_SYSTEMERROR:
switch (rpcerr->re_errno) {
case ETIMEDOUT:
return (TRYRET_TIMEOUT);
case ENOMEM:
break;
default:
return (TRYRET_REMOTEERR);
}
/* FALLTHROUGH */
default:
break;
}
return (TRYRET_LOCALERR);
}
/*
* Look up a netid based on an address family and socket type.
* `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
*
* XXX there should be a library function for this.
*/
char *
netidbytype(int af, int sotype) {
struct nc_protos *p;
for (p = nc_protos; p->netid != NULL; p++) {
if (af != p->af || sotype != p->sotype)
continue;
return (p->netid);
}
return (NULL);
}
/*
* Look up a netconfig entry based on a netid, and cache the result so
* that we don't need to remember to call freenetconfigent().
*
* Otherwise it behaves just like getnetconfigent(), so nc_*error()
* work on failure.
*/
struct netconfig *
getnetconf_cached(const char *netid) {
static struct nc_entry {
struct netconfig *nconf;
struct nc_entry *next;
} *head;
struct nc_entry *p;
struct netconfig *nconf;
for (p = head; p != NULL; p = p->next)
if (strcmp(netid, p->nconf->nc_netid) == 0)
return (p->nconf);
if ((nconf = getnetconfigent(netid)) == NULL)
return (NULL);
if ((p = malloc(sizeof(*p))) == NULL)
err(1, "malloc");
p->nconf = nconf;
p->next = head;
head = p;
return (p->nconf);
}
/*
* xdr routines for mount rpc's
*/
int
xdr_dir(xdrsp, dirp)
XDR *xdrsp;
char *dirp;
{
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
int
xdr_fh(xdrsp, np)
XDR *xdrsp;
struct nfhret *np;
{
int i;
long auth, authcnt, authfnd = 0;
if (!xdr_u_long(xdrsp, &np->stat))
return (0);
if (np->stat)
return (1);
switch (np->vers) {
case 1:
np->fhsize = NFSX_V2FH;
return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
case 3:
if (!xdr_long(xdrsp, &np->fhsize))
return (0);
if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
return (0);
if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
return (0);
if (!xdr_long(xdrsp, &authcnt))
return (0);
for (i = 0; i < authcnt; i++) {
if (!xdr_long(xdrsp, &auth))
return (0);
if (auth == np->auth)
authfnd++;
}
/*
* Some servers, such as DEC's OSF/1 return a nil authenticator
* list to indicate RPCAUTH_UNIX.
*/
if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
np->stat = EAUTH;
return (1);
};
return (0);
}
void
usage()
{
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: mount_nfs [-23KNPTUbcdilqs] [-D deadthresh] [-I readdirsize]",
" [-R retrycnt] [-a maxreadahead]",
" [-g maxgroups] [-m realm] [-o options] [-r readsize]",
" [-t timeout] [-w writesize] [-x retrans] rhost:path node");
exit(1);
}