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6c809a426a
freebsd-skq/sbin/mount_nfs/mount_nfs.c
yar 6c809a426a Add a work-around to make it possible again to remount 
NFS root r/w.

The real solution would be to bring the whole nmount(2)
framework, including FS drivers and userland tools, into
a consistent state at last; but things should work in the
meantime, too.

Reported by:	kris
2008-02-18 10:24:47 +00:00

1189 lines
30 KiB
C
Raw Blame History

/*
* 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.
* 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 <sys/uio.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 },
{ "fg", 1, 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 },
{ "hard", 1, 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 },
MOPT_END
};
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, 0, 0}
};
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_UDP;
int mnttcp_ok = 1;
char *portspec = NULL; /* Server nfs port; NULL means look up via rpcbind. */
enum mountmode {
ANY,
V2,
V3,
V4
} 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 *);
int getnfs4args(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 nfs4_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(int argc, char *argv[])
{
int c;
struct nfs_args *nfsargsp;
struct nfs_args nfsargs;
struct iovec *iov;
int mntflags, altflags, num;
int iovlen;
char *name, *p, *spec, *fstype;
char mntpath[MAXPATHLEN], errmsg[255];
mntflags = 0;
altflags = 0;
nfsargs = nfsdefargs;
nfsargsp = &nfsargs;
iov = NULL;
iovlen = 0;
memset(errmsg, 0, sizeof(errmsg));
fstype = strrchr(argv[0], '_');
if (fstype == NULL)
errx(EX_USAGE, "argv[0] must end in _fstype");
++fstype;
if (strcmp(fstype, "nfs4") == 0) {
nfsproto = IPPROTO_TCP;
portspec = "2049";
nfsdefargs.sotype = SOCK_STREAM;
mountmode = V4;
}
while ((c = getopt(argc, argv,
"234a:bcdD:g:I:iLlNo:PR:r:sTt:w:x:U")) != -1)
switch (c) {
case '2':
mountmode = V2;
break;
case '3':
mountmode = V3;
break;
case '4':
mountmode = V4;
fstype = "nfs4";
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)
mnttcp_ok = 0;
if (altflags & ALTF_TCP) {
nfsargsp->sotype = SOCK_STREAM;
nfsproto = IPPROTO_TCP;
}
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':
mnttcp_ok = 0;
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 (mountmode == V4) {
if (!getnfs4args(spec, nfsargsp))
exit(1);
} else {
if (!getnfsargs(spec, nfsargsp))
exit(1);
}
/* resolve the mountpoint with realpath(3) */
(void)checkpath(name, mntpath);
/*
* XXX This should go away when this NFS implementation
* is fully converted to nmount(2) semantics.
*/
if (mntflags & MNT_RDONLY)
build_iovec(&iov, &iovlen, "ro", NULL, 0);
else if (mntflags & MNT_UPDATE)
build_iovec(&iov, &iovlen, "noro", NULL, 0);
build_iovec(&iov, &iovlen, "nfs_args", nfsargsp, sizeof(*nfsargsp));
build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
if (nmount(iov, iovlen, mntflags))
err(1, "%s, %s", mntpath, errmsg);
exit(0);
}
int
getnfsargs(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);
}
int
getnfs4args(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 = nfs4_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 nfhret nfhret;
struct timeval try;
struct rpc_err rpcerr;
CLIENT *clp;
struct netconfig *nconf, *nconf_mnt;
char *netid, *netid_mnt;
int doconnect, nfsvers, mntvers;
enum clnt_stat stat;
enum mountmode trymntmode;
trymntmode = mountmode;
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);
}
/* The RPCPROG_MNT netid may be different. */
if (mnttcp_ok) {
netid_mnt = netid;
nconf_mnt = nconf;
} else {
if ((netid_mnt = netidbytype(ai->ai_family, SOCK_DGRAM))
== NULL) {
snprintf(errbuf, sizeof errbuf,
"af %d sotype SOCK_DGRAM not supported",
ai->ai_family);
return (TRYRET_LOCALERR);
}
if ((nconf_mnt = getnetconf_cached(netid_mnt)) == NULL) {
snprintf(errbuf, sizeof errbuf, "%s: %s", netid_mnt,
nc_sperror());
return (TRYRET_LOCALERR);
}
}
tryagain:
if (trymntmode == V2) {
nfsvers = 2;
mntvers = 1;
} else {
nfsvers = 3;
mntvers = 3;
}
if (portspec != NULL) {
/* `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)) {
if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
trymntmode == ANY) {
trymntmode = V2;
goto tryagain;
}
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));
}
}
/* 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) {
if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
clnt_destroy(clp);
trymntmode = V2;
goto tryagain;
}
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);
/* Send the RPCMNT_MOUNT RPC to get the root filehandle. */
try.tv_sec = 10;
try.tv_usec = 0;
clp = clnt_tp_create(hostp, RPCPROG_MNT, mntvers, nconf_mnt);
if (clp == NULL) {
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
hostp, spec, clnt_spcreateerror("RPCMNT: clnt_create"));
return (returncode(rpc_createerr.cf_stat,
&rpc_createerr.cf_error));
}
clp->cl_auth = authsys_create_default();
nfhret.auth = RPCAUTH_UNIX;
nfhret.vers = mntvers;
stat = clnt_call(clp, RPCMNT_MOUNT, (xdrproc_t)xdr_dir, spec,
(xdrproc_t)xdr_fh, &nfhret,
try);
auth_destroy(clp->cl_auth);
if (stat != RPC_SUCCESS) {
if (stat == RPC_PROGVERSMISMATCH && trymntmode == ANY) {
clnt_destroy(clp);
trymntmode = V2;
goto tryagain;
}
clnt_geterr(clp, &rpcerr);
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
hostp, spec, clnt_sperror(clp, "RPCPROG_MNT"));
clnt_destroy(clp);
return (returncode(stat, &rpcerr));
}
clnt_destroy(clp);
if (nfhret.stat != 0) {
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s", netid_mnt,
hostp, spec, strerror(nfhret.stat));
return (TRYRET_REMOTEERR);
}
/*
* 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);
nfsargsp->fhsize = nfhret.fhsize;
nfsargsp->fh = malloc(nfsargsp->fhsize);
if (nfsargsp->addr == NULL || nfsargsp->fh == NULL)
err(1, "malloc");
bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen);
bcopy(nfhret.nfh, nfsargsp->fh, nfsargsp->fhsize);
if (nfsvers == 3)
nfsargsp->flags |= NFSMNT_NFSV3;
else
nfsargsp->flags &= ~NFSMNT_NFSV3;
return (TRYRET_SUCCESS);
}
/*
* 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
nfs4_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));
}
}
/*
* 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(XDR *xdrsp, char *dirp)
{
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
int
xdr_fh(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 [-234bcdiLlNPsTU] [-a maxreadahead] [-D deadthresh]",
" [-g maxgroups] [-I readdirsize] [-o options] [-R retrycnt]",
" [-r readsize] [-t timeout] [-w writesize] [-x retrans]",
" rhost:path node");
exit(1);
}
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