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hush/util-linux/nfsmount.c
Bernhard Reutner-Fischer e2e56c7c41 - single KERNEL_VERSION(a,b,c) macro in platform.h 
- rename get_kernel_revision() to get_linux_version_code
from Robert P. J. Day
2006-05-19 11:54:02 +00:00

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/* vi: set sw=4 ts=4: */
/*
* nfsmount.c -- Linux NFS mount
* Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
* numbers to be specified on the command line.
*
* Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
* Omit the call to connect() for Linux version 1.3.11 or later.
*
* Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
* Implemented the "bg", "fg" and "retry" mount options for NFS.
*
* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
* - added Native Language Support
*
* Modified by Olaf Kirch and Trond Myklebust for new NFS code,
* plus NFSv3 stuff.
*/
/*
* nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
*/
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <sys/socket.h>
#include <time.h>
#include <sys/utsname.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include "busybox.h"
#undef TRUE
#undef FALSE
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#include "nfsmount.h"
/* This is just a warning of a common mistake. Possibly this should be a
* uclibc faq entry rather than in busybox... */
#if ENABLE_FEATURE_MOUNT_NFS && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
#error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support."
#endif
/*
* NFS stats. The good thing with these values is that NFSv3 errors are
* a superset of NFSv2 errors (with the exception of NFSERR_WFLUSH which
* no-one uses anyway), so we can happily mix code as long as we make sure
* no NFSv3 errors are returned to NFSv2 clients.
* Error codes that have a `--' in the v2 column are not part of the
* standard, but seem to be widely used nevertheless.
*/
enum nfs_stat {
NFS_OK = 0, /* v2 v3 */
NFSERR_PERM = 1, /* v2 v3 */
NFSERR_NOENT = 2, /* v2 v3 */
NFSERR_IO = 5, /* v2 v3 */
NFSERR_NXIO = 6, /* v2 v3 */
NFSERR_EAGAIN = 11, /* v2 v3 */
NFSERR_ACCES = 13, /* v2 v3 */
NFSERR_EXIST = 17, /* v2 v3 */
NFSERR_XDEV = 18, /* v3 */
NFSERR_NODEV = 19, /* v2 v3 */
NFSERR_NOTDIR = 20, /* v2 v3 */
NFSERR_ISDIR = 21, /* v2 v3 */
NFSERR_INVAL = 22, /* v2 v3 that Sun forgot */
NFSERR_FBIG = 27, /* v2 v3 */
NFSERR_NOSPC = 28, /* v2 v3 */
NFSERR_ROFS = 30, /* v2 v3 */
NFSERR_MLINK = 31, /* v3 */
NFSERR_OPNOTSUPP = 45, /* v2 v3 */
NFSERR_NAMETOOLONG = 63, /* v2 v3 */
NFSERR_NOTEMPTY = 66, /* v2 v3 */
NFSERR_DQUOT = 69, /* v2 v3 */
NFSERR_STALE = 70, /* v2 v3 */
NFSERR_REMOTE = 71, /* v2 v3 */
NFSERR_WFLUSH = 99, /* v2 */
NFSERR_BADHANDLE = 10001, /* v3 */
NFSERR_NOT_SYNC = 10002, /* v3 */
NFSERR_BAD_COOKIE = 10003, /* v3 */
NFSERR_NOTSUPP = 10004, /* v3 */
NFSERR_TOOSMALL = 10005, /* v3 */
NFSERR_SERVERFAULT = 10006, /* v3 */
NFSERR_BADTYPE = 10007, /* v3 */
NFSERR_JUKEBOX = 10008 /* v3 */
};
#define NFS_PROGRAM 100003
enum {
#ifndef NFS_FHSIZE
NFS_FHSIZE = 32,
#endif
#ifndef NFS_PORT
NFS_PORT = 2049
#endif
};
/* Disable the nls stuff */
# undef bindtextdomain
# define bindtextdomain(Domain, Directory) /* empty */
# undef textdomain
# define textdomain(Domain) /* empty */
enum {
MS_MGC_VAL = 0xc0ed0000, /* Magic number indicatng "new" flags */
MS_RDONLY = 1, /* Mount read-only */
MS_NOSUID = 2, /* Ignore suid and sgid bits */
MS_NODEV = 4, /* Disallow access to device special files */
MS_NOEXEC = 8, /* Disallow program execution */
MS_SYNCHRONOUS = 16, /* Writes are synced at once */
MS_REMOUNT = 32, /* Alter flags of a mounted FS */
MS_MANDLOCK = 64, /* Allow mandatory locks on an FS */
S_QUOTA = 128, /* Quota initialized for file/directory/symlink */
S_APPEND = 256, /* Append-only file */
S_IMMUTABLE = 512, /* Immutable file */
MS_NOATIME = 1024, /* Do not update access times. */
MS_NODIRATIME = 2048 /* Do not update directory access times */
};
/*
* We want to be able to compile mount on old kernels in such a way
* that the binary will work well on more recent kernels.
* Thus, if necessary we teach nfsmount.c the structure of new fields
* that will come later.
*
* Moreover, the new kernel includes conflict with glibc includes
* so it is easiest to ignore the kernel altogether (at compile time).
*/
/* NOTE: Do not make this into a 'static const int' because the pre-processor
* needs to test this value in some #if statements. */
#define NFS_MOUNT_VERSION 4
struct nfs2_fh {
char data[32];
};
struct nfs3_fh {
unsigned short size;
unsigned char data[64];
};
struct nfs_mount_data {
int version; /* 1 */
int fd; /* 1 */
struct nfs2_fh old_root; /* 1 */
int flags; /* 1 */
int rsize; /* 1 */
int wsize; /* 1 */
int timeo; /* 1 */
int retrans; /* 1 */
int acregmin; /* 1 */
int acregmax; /* 1 */
int acdirmin; /* 1 */
int acdirmax; /* 1 */
struct sockaddr_in addr; /* 1 */
char hostname[256]; /* 1 */
int namlen; /* 2 */
unsigned int bsize; /* 3 */
struct nfs3_fh root; /* 4 */
};
/* bits in the flags field */
enum {
NFS_MOUNT_SOFT = 0x0001, /* 1 */
NFS_MOUNT_INTR = 0x0002, /* 1 */
NFS_MOUNT_SECURE = 0x0004, /* 1 */
NFS_MOUNT_POSIX = 0x0008, /* 1 */
NFS_MOUNT_NOCTO = 0x0010, /* 1 */
NFS_MOUNT_NOAC = 0x0020, /* 1 */
NFS_MOUNT_TCP = 0x0040, /* 2 */
NFS_MOUNT_VER3 = 0x0080, /* 3 */
NFS_MOUNT_KERBEROS = 0x0100, /* 3 */
NFS_MOUNT_NONLM = 0x0200 /* 3 */
};
#define UTIL_LINUX_VERSION "2.10m"
#define util_linux_version "util-linux-2.10m"
#define HAVE_inet_aton
#define HAVE_scsi_h
#define HAVE_blkpg_h
#define HAVE_kd_h
#define HAVE_termcap
#define HAVE_locale_h
#define HAVE_libintl_h
#define ENABLE_NLS
#define HAVE_langinfo_h
#define HAVE_progname
#define HAVE_openpty
#define HAVE_nanosleep
#define HAVE_personality
#define HAVE_tm_gmtoff
static char *nfs_strerror(int status);
#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
enum {
EX_FAIL = 32, /* mount failure */
EX_BG = 256 /* retry in background (internal only) */
};
/*
* nfs_mount_version according to the sources seen at compile time.
*/
static int nfs_mount_version;
/*
* Unfortunately, the kernel prints annoying console messages
* in case of an unexpected nfs mount version (instead of
* just returning some error). Therefore we'll have to try
* and figure out what version the kernel expects.
*
* Variables:
* KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
* NFS_MOUNT_VERSION: these nfsmount sources at compile time
* nfs_mount_version: version this source and running kernel can handle
*/
static void
find_kernel_nfs_mount_version(void)
{
static int kernel_version = 0;
if (kernel_version)
return;
nfs_mount_version = NFS_MOUNT_VERSION; /* default */
kernel_version = get_linux_version_code();
if (kernel_version) {
if (kernel_version < KERNEL_VERSION(2,1,32))
nfs_mount_version = 1;
else if (kernel_version < KERNEL_VERSION(2,2,18) ||
(kernel_version >= KERNEL_VERSION(2,3,0) &&
kernel_version < KERNEL_VERSION(2,3,99)))
nfs_mount_version = 3;
else
nfs_mount_version = 4; /* since 2.3.99pre4 */
}
if (nfs_mount_version > NFS_MOUNT_VERSION)
nfs_mount_version = NFS_MOUNT_VERSION;
}
static struct pmap *
get_mountport(struct sockaddr_in *server_addr,
long unsigned prog,
long unsigned version,
long unsigned proto,
long unsigned port)
{
struct pmaplist *pmap;
static struct pmap p = {0, 0, 0, 0};
server_addr->sin_port = PMAPPORT;
pmap = pmap_getmaps(server_addr);
if (version > MAX_NFSPROT)
version = MAX_NFSPROT;
if (!prog)
prog = MOUNTPROG;
p.pm_prog = prog;
p.pm_vers = version;
p.pm_prot = proto;
p.pm_port = port;
while (pmap) {
if (pmap->pml_map.pm_prog != prog)
goto next;
if (!version && p.pm_vers > pmap->pml_map.pm_vers)
goto next;
if (version > 2 && pmap->pml_map.pm_vers != version)
goto next;
if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
goto next;
if (pmap->pml_map.pm_vers > MAX_NFSPROT ||
(proto && p.pm_prot && pmap->pml_map.pm_prot != proto) ||
(port && pmap->pml_map.pm_port != port))
goto next;
memcpy(&p, &pmap->pml_map, sizeof(p));
next:
pmap = pmap->pml_next;
}
if (!p.pm_vers)
p.pm_vers = MOUNTVERS;
if (!p.pm_port)
p.pm_port = MOUNTPORT;
if (!p.pm_prot)
p.pm_prot = IPPROTO_TCP;
return &p;
}
int nfsmount(const char *spec, const char *node, int *flags,
char **mount_opts, int running_bg)
{
static char *prev_bg_host;
char hostdir[1024];
CLIENT *mclient;
char *hostname;
char *pathname;
char *old_opts;
char *mounthost=NULL;
char new_opts[1024];
struct timeval total_timeout;
enum clnt_stat clnt_stat;
struct nfs_mount_data data;
char *opt, *opteq;
int val;
struct hostent *hp;
struct sockaddr_in server_addr;
struct sockaddr_in mount_server_addr;
struct pmap* pm_mnt;
int msock, fsock;
struct timeval retry_timeout;
union {
struct fhstatus nfsv2;
struct mountres3 nfsv3;
} status;
struct stat statbuf;
char *s;
int port;
int mountport;
int proto;
int bg;
int soft;
int intr;
int posix;
int nocto;
int noac;
int nolock;
int retry;
int tcp;
int mountprog;
int mountvers;
int nfsprog;
int nfsvers;
int retval;
time_t t;
time_t prevt;
time_t timeout;
find_kernel_nfs_mount_version();
retval = EX_FAIL;
msock = fsock = -1;
mclient = NULL;
if (strlen(spec) >= sizeof(hostdir)) {
bb_error_msg("excessively long host:dir argument");
goto fail;
}
strcpy(hostdir, spec);
if ((s = strchr(hostdir, ':'))) {
hostname = hostdir;
pathname = s + 1;
*s = '\0';
/* Ignore all but first hostname in replicated mounts
until they can be fully supported. (mack@sgi.com) */
if ((s = strchr(hostdir, ','))) {
*s = '\0';
bb_error_msg("warning: multiple hostnames not supported");
}
} else {
bb_error_msg("directory to mount not in host:dir format");
goto fail;
}
server_addr.sin_family = AF_INET;
#ifdef HAVE_inet_aton
if (!inet_aton(hostname, &server_addr.sin_addr))
#endif
{
if ((hp = gethostbyname(hostname)) == NULL) {
bb_herror_msg("%s", hostname);
goto fail;
} else {
if (hp->h_length > sizeof(struct in_addr)) {
bb_error_msg("got bad hp->h_length");
hp->h_length = sizeof(struct in_addr);
}
memcpy(&server_addr.sin_addr,
hp->h_addr, hp->h_length);
}
}
memcpy (&mount_server_addr, &server_addr, sizeof (mount_server_addr));
/* add IP address to mtab options for use when unmounting */
s = inet_ntoa(server_addr.sin_addr);
old_opts = *mount_opts;
if (!old_opts)
old_opts = "";
if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) {
bb_error_msg("excessively long option argument");
goto fail;
}
sprintf(new_opts, "%s%saddr=%s",
old_opts, *old_opts ? "," : "", s);
*mount_opts = bb_xstrdup(new_opts);
/* Set default options.
* rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
* let the kernel decide.
* timeo is filled in after we know whether it'll be TCP or UDP. */
memset(&data, 0, sizeof(data));
data.retrans = 3;
data.acregmin = 3;
data.acregmax = 60;
data.acdirmin = 30;
data.acdirmax = 60;
#if NFS_MOUNT_VERSION >= 2
data.namlen = NAME_MAX;
#endif
bg = 0;
soft = 0;
intr = 0;
posix = 0;
nocto = 0;
nolock = 0;
noac = 0;
retry = 10000; /* 10000 minutes ~ 1 week */
tcp = 0;
mountprog = MOUNTPROG;
mountvers = 0;
port = 0;
mountport = 0;
nfsprog = NFS_PROGRAM;
nfsvers = 0;
/* parse options */
for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
if ((opteq = strchr(opt, '='))) {
val = atoi(opteq + 1);
*opteq = '\0';
if (!strcmp(opt, "rsize"))
data.rsize = val;
else if (!strcmp(opt, "wsize"))
data.wsize = val;
else if (!strcmp(opt, "timeo"))
data.timeo = val;
else if (!strcmp(opt, "retrans"))
data.retrans = val;
else if (!strcmp(opt, "acregmin"))
data.acregmin = val;
else if (!strcmp(opt, "acregmax"))
data.acregmax = val;
else if (!strcmp(opt, "acdirmin"))
data.acdirmin = val;
else if (!strcmp(opt, "acdirmax"))
data.acdirmax = val;
else if (!strcmp(opt, "actimeo")) {
data.acregmin = val;
data.acregmax = val;
data.acdirmin = val;
data.acdirmax = val;
}
else if (!strcmp(opt, "retry"))
retry = val;
else if (!strcmp(opt, "port"))
port = val;
else if (!strcmp(opt, "mountport"))
mountport = val;
else if (!strcmp(opt, "mounthost"))
mounthost=bb_xstrndup(opteq+1,
strcspn(opteq+1," \t\n\r,"));
else if (!strcmp(opt, "mountprog"))
mountprog = val;
else if (!strcmp(opt, "mountvers"))
mountvers = val;
else if (!strcmp(opt, "nfsprog"))
nfsprog = val;
else if (!strcmp(opt, "nfsvers") ||
!strcmp(opt, "vers"))
nfsvers = val;
else if (!strcmp(opt, "proto")) {
if (!strncmp(opteq+1, "tcp", 3))
tcp = 1;
else if (!strncmp(opteq+1, "udp", 3))
tcp = 0;
else
printf(_("Warning: Unrecognized proto= option.\n"));
} else if (!strcmp(opt, "namlen")) {
#if NFS_MOUNT_VERSION >= 2
if (nfs_mount_version >= 2)
data.namlen = val;
else
#endif
printf(_("Warning: Option namlen is not supported.\n"));
} else if (!strcmp(opt, "addr"))
/* ignore */;
else {
printf(_("unknown nfs mount parameter: "
"%s=%d\n"), opt, val);
goto fail;
}
}
else {
val = 1;
if (!strncmp(opt, "no", 2)) {
val = 0;
opt += 2;
}
if (!strcmp(opt, "bg"))
bg = val;
else if (!strcmp(opt, "fg"))
bg = !val;
else if (!strcmp(opt, "soft"))
soft = val;
else if (!strcmp(opt, "hard"))
soft = !val;
else if (!strcmp(opt, "intr"))
intr = val;
else if (!strcmp(opt, "posix"))
posix = val;
else if (!strcmp(opt, "cto"))
nocto = !val;
else if (!strcmp(opt, "ac"))
noac = !val;
else if (!strcmp(opt, "tcp"))
tcp = val;
else if (!strcmp(opt, "udp"))
tcp = !val;
else if (!strcmp(opt, "lock")) {
if (nfs_mount_version >= 3)
nolock = !val;
else
printf(_("Warning: option nolock is not supported.\n"));
} else {
printf(_("unknown nfs mount option: "
"%s%s\n"), val ? "" : "no", opt);
goto fail;
}
}
}
proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
data.flags = (soft ? NFS_MOUNT_SOFT : 0)
| (intr ? NFS_MOUNT_INTR : 0)
| (posix ? NFS_MOUNT_POSIX : 0)
| (nocto ? NFS_MOUNT_NOCTO : 0)
| (noac ? NFS_MOUNT_NOAC : 0);
#if NFS_MOUNT_VERSION >= 2
if (nfs_mount_version >= 2)
data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
#endif
#if NFS_MOUNT_VERSION >= 3
if (nfs_mount_version >= 3)
data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
#endif
if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
bb_error_msg("NFSv%d not supported!", nfsvers);
return 1;
}
if (nfsvers && !mountvers)
mountvers = (nfsvers < 3) ? 1 : nfsvers;
if (nfsvers && nfsvers < mountvers) {
mountvers = nfsvers;
}
/* Adjust options if none specified */
if (!data.timeo)
data.timeo = tcp ? 70 : 7;
#ifdef NFS_MOUNT_DEBUG
printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
data.rsize, data.wsize, data.timeo, data.retrans);
printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
port, bg, retry, data.flags);
printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
mountprog, mountvers, nfsprog, nfsvers);
printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n",
(data.flags & NFS_MOUNT_SOFT) != 0,
(data.flags & NFS_MOUNT_INTR) != 0,
(data.flags & NFS_MOUNT_POSIX) != 0,
(data.flags & NFS_MOUNT_NOCTO) != 0,
(data.flags & NFS_MOUNT_NOAC) != 0);
#if NFS_MOUNT_VERSION >= 2
printf("tcp = %d\n",
(data.flags & NFS_MOUNT_TCP) != 0);
#endif
#endif
data.version = nfs_mount_version;
if (*flags & MS_REMOUNT)
goto copy_data_and_return;
/*
* If the previous mount operation on the same host was
* backgrounded, and the "bg" for this mount is also set,
* give up immediately, to avoid the initial timeout.
*/
if (bg && !running_bg &&
prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
if (retry > 0)
retval = EX_BG;
return retval;
}
/* create mount deamon client */
/* See if the nfs host = mount host. */
if (mounthost) {
if (mounthost[0] >= '0' && mounthost[0] <= '9') {
mount_server_addr.sin_family = AF_INET;
mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
} else {
if ((hp = gethostbyname(mounthost)) == NULL) {
bb_herror_msg("%s", mounthost);
goto fail;
} else {
if (hp->h_length > sizeof(struct in_addr)) {
bb_error_msg("got bad hp->h_length?");
hp->h_length = sizeof(struct in_addr);
}
mount_server_addr.sin_family = AF_INET;
memcpy(&mount_server_addr.sin_addr,
hp->h_addr, hp->h_length);
}
}
}
/*
* The following loop implements the mount retries. On the first
* call, "running_bg" is 0. When the mount times out, and the
* "bg" option is set, the exit status EX_BG will be returned.
* For a backgrounded mount, there will be a second call by the
* child process with "running_bg" set to 1.
*
* The case where the mount point is not present and the "bg"
* option is set, is treated as a timeout. This is done to
* support nested mounts.
*
* The "retry" count specified by the user is the number of
* minutes to retry before giving up.
*
* Only the first error message will be displayed.
*/
retry_timeout.tv_sec = 3;
retry_timeout.tv_usec = 0;
total_timeout.tv_sec = 20;
total_timeout.tv_usec = 0;
timeout = time(NULL) + 60 * retry;
prevt = 0;
t = 30;
val = 1;
for (;;) {
if (bg && stat(node, &statbuf) == -1) {
if (running_bg) {
sleep(val); /* 1, 2, 4, 8, 16, 30, ... */
val *= 2;
if (val > 30)
val = 30;
}
} else {
/* be careful not to use too many CPU cycles */
if (t - prevt < 30)
sleep(30);
pm_mnt = get_mountport(&mount_server_addr,
mountprog,
mountvers,
proto,
mountport);
/* contact the mount daemon via TCP */
mount_server_addr.sin_port = htons(pm_mnt->pm_port);
msock = RPC_ANYSOCK;
switch (pm_mnt->pm_prot) {
case IPPROTO_UDP:
mclient = clntudp_create(&mount_server_addr,
pm_mnt->pm_prog,
pm_mnt->pm_vers,
retry_timeout,
&msock);
if (mclient)
break;
mount_server_addr.sin_port = htons(pm_mnt->pm_port);
msock = RPC_ANYSOCK;
case IPPROTO_TCP:
mclient = clnttcp_create(&mount_server_addr,
pm_mnt->pm_prog,
pm_mnt->pm_vers,
&msock, 0, 0);
break;
default:
mclient = 0;
}
if (mclient) {
/* try to mount hostname:pathname */
mclient->cl_auth = authunix_create_default();
/* make pointers in xdr_mountres3 NULL so
* that xdr_array allocates memory for us
*/
memset(&status, 0, sizeof(status));
if (pm_mnt->pm_vers == 3)
clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
(xdrproc_t) xdr_dirpath,
(caddr_t) &pathname,
(xdrproc_t) xdr_mountres3,
(caddr_t) &status,
total_timeout);
else
clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
(xdrproc_t) xdr_dirpath,
(caddr_t) &pathname,
(xdrproc_t) xdr_fhstatus,
(caddr_t) &status,
total_timeout);
if (clnt_stat == RPC_SUCCESS)
break; /* we're done */
if (errno != ECONNREFUSED) {
clnt_perror(mclient, "mount");
goto fail; /* don't retry */
}
if (!running_bg && prevt == 0)
clnt_perror(mclient, "mount");
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
mclient = 0;
close(msock);
} else {
if (!running_bg && prevt == 0)
clnt_pcreateerror("mount");
}
prevt = t;
}
if (!bg)
goto fail;
if (!running_bg) {
prev_bg_host = bb_xstrdup(hostname);
if (retry > 0)
retval = EX_BG;
goto fail;
}
t = time(NULL);
if (t >= timeout)
goto fail;
}
nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers;
if (nfsvers == 2) {
if (status.nfsv2.fhs_status != 0) {
bb_error_msg("%s:%s failed, reason given by server: %s",
hostname, pathname,
nfs_strerror(status.nfsv2.fhs_status));
goto fail;
}
memcpy(data.root.data,
(char *) status.nfsv2.fhstatus_u.fhs_fhandle,
NFS_FHSIZE);
#if NFS_MOUNT_VERSION >= 4
data.root.size = NFS_FHSIZE;
memcpy(data.old_root.data,
(char *) status.nfsv2.fhstatus_u.fhs_fhandle,
NFS_FHSIZE);
#endif
} else {
#if NFS_MOUNT_VERSION >= 4
fhandle3 *my_fhandle;
if (status.nfsv3.fhs_status != 0) {
bb_error_msg("%s:%s failed, reason given by server: %s",
hostname, pathname,
nfs_strerror(status.nfsv3.fhs_status));
goto fail;
}
my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
memset(data.old_root.data, 0, NFS_FHSIZE);
memset(&data.root, 0, sizeof(data.root));
data.root.size = my_fhandle->fhandle3_len;
memcpy(data.root.data,
(char *) my_fhandle->fhandle3_val,
my_fhandle->fhandle3_len);
data.flags |= NFS_MOUNT_VER3;
#endif
}
/* create nfs socket for kernel */
if (tcp) {
if (nfs_mount_version < 3) {
printf(_("NFS over TCP is not supported.\n"));
goto fail;
}
fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
} else
fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (fsock < 0) {
perror(_("nfs socket"));
goto fail;
}
if (bindresvport(fsock, 0) < 0) {
perror(_("nfs bindresvport"));
goto fail;
}
if (port == 0) {
server_addr.sin_port = PMAPPORT;
port = pmap_getport(&server_addr, nfsprog, nfsvers,
tcp ? IPPROTO_TCP : IPPROTO_UDP);
if (port == 0)
port = NFS_PORT;
#ifdef NFS_MOUNT_DEBUG
else
printf(_("used portmapper to find NFS port\n"));
#endif
}
#ifdef NFS_MOUNT_DEBUG
printf(_("using port %d for nfs deamon\n"), port);
#endif
server_addr.sin_port = htons(port);
/*
* connect() the socket for kernels 1.3.10 and below only,
* to avoid problems with multihomed hosts.
* --Swen
*/
if (get_linux_version_code() <= KERNEL_VERSION(2,3,10)
&& connect(fsock, (struct sockaddr *) &server_addr,
sizeof (server_addr)) < 0) {
perror(_("nfs connect"));
goto fail;
}
/* prepare data structure for kernel */
data.fd = fsock;
memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
strncpy(data.hostname, hostname, sizeof(data.hostname));
/* clean up */
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
close(msock);
copy_data_and_return:
*mount_opts = xrealloc(*mount_opts, sizeof(data));
memcpy(*mount_opts, &data, sizeof(data));
return 0;
/* abort */
fail:
if (msock != -1) {
if (mclient) {
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
}
close(msock);
}
if (fsock != -1)
close(fsock);
return retval;
}
/*
* We need to translate between nfs status return values and
* the local errno values which may not be the same.
*
* Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
* "after #include <errno.h> the symbol errno is reserved for any use,
* it cannot even be used as a struct tag or field name".
*/
#ifndef EDQUOT
#define EDQUOT ENOSPC
#endif
static const struct {
enum nfs_stat stat;
int errnum;
} nfs_errtbl[] = {
{ NFS_OK, 0 },
{ NFSERR_PERM, EPERM },
{ NFSERR_NOENT, ENOENT },
{ NFSERR_IO, EIO },
{ NFSERR_NXIO, ENXIO },
{ NFSERR_ACCES, EACCES },
{ NFSERR_EXIST, EEXIST },
{ NFSERR_NODEV, ENODEV },
{ NFSERR_NOTDIR, ENOTDIR },
{ NFSERR_ISDIR, EISDIR },
#ifdef NFSERR_INVAL
{ NFSERR_INVAL, EINVAL }, /* that Sun forgot */
#endif
{ NFSERR_FBIG, EFBIG },
{ NFSERR_NOSPC, ENOSPC },
{ NFSERR_ROFS, EROFS },
{ NFSERR_NAMETOOLONG, ENAMETOOLONG },
{ NFSERR_NOTEMPTY, ENOTEMPTY },
{ NFSERR_DQUOT, EDQUOT },
{ NFSERR_STALE, ESTALE },
#ifdef EWFLUSH
{ NFSERR_WFLUSH, EWFLUSH },
#endif
/* Throw in some NFSv3 values for even more fun (HP returns these) */
{ 71, EREMOTE },
{ -1, EIO }
};
static char *nfs_strerror(int status)
{
int i;
static char buf[256];
for (i = 0; nfs_errtbl[i].stat != -1; i++) {
if (nfs_errtbl[i].stat == status)
return strerror(nfs_errtbl[i].errnum);
}
sprintf(buf, _("unknown nfs status return value: %d"), status);
return buf;
}
static bool_t
xdr_fhandle (XDR *xdrs, fhandle objp)
{
if (!xdr_opaque (xdrs, objp, FHSIZE))
return FALSE;
return TRUE;
}
bool_t
xdr_fhstatus (XDR *xdrs, fhstatus *objp)
{
if (!xdr_u_int (xdrs, &objp->fhs_status))
return FALSE;
switch (objp->fhs_status) {
case 0:
if (!xdr_fhandle (xdrs, objp->fhstatus_u.fhs_fhandle))
return FALSE;
break;
default:
break;
}
return TRUE;
}
bool_t
xdr_dirpath (XDR *xdrs, dirpath *objp)
{
if (!xdr_string (xdrs, objp, MNTPATHLEN))
return FALSE;
return TRUE;
}
bool_t
xdr_fhandle3 (XDR *xdrs, fhandle3 *objp)
{
if (!xdr_bytes (xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3))
return FALSE;
return TRUE;
}
bool_t
xdr_mountres3_ok (XDR *xdrs, mountres3_ok *objp)
{
if (!xdr_fhandle3 (xdrs, &objp->fhandle))
return FALSE;
if (!xdr_array (xdrs, (char **)&objp->auth_flavours.auth_flavours_val, (unsigned int *) &objp->auth_flavours.auth_flavours_len, ~0,
sizeof (int), (xdrproc_t) xdr_int))
return FALSE;
return TRUE;
}
bool_t
xdr_mountstat3 (XDR *xdrs, mountstat3 *objp)
{
if (!xdr_enum (xdrs, (enum_t *) objp))
return FALSE;
return TRUE;
}
bool_t
xdr_mountres3 (XDR *xdrs, mountres3 *objp)
{
if (!xdr_mountstat3 (xdrs, &objp->fhs_status))
return FALSE;
switch (objp->fhs_status) {
case MNT_OK:
if (!xdr_mountres3_ok (xdrs, &objp->mountres3_u.mountinfo))
return FALSE;
break;
default:
break;
}
return TRUE;
}
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