mirror of
https://github.com/sheumann/hush.git
synced 2024-12-23 05:29:58 +00:00
00d7d6cef6
option - it was going to return a special flag back to caller and expecting caller to call it again with special parameter! Also caller was charged with calling mount() syscall... mount: mtab support was non-functional. Enabling it revealed serious bug which is not fixed yet.
1023 lines
24 KiB
C
1023 lines
24 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* nfsmount.c -- Linux NFS mount
|
|
* Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for 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.
|
|
*/
|
|
|
|
#include "busybox.h"
|
|
#include <syslog.h>
|
|
#include <mntent.h>
|
|
#include <sys/utsname.h>
|
|
#undef TRUE
|
|
#undef FALSE
|
|
#include <rpc/rpc.h>
|
|
#include <rpc/pmap_prot.h>
|
|
#include <rpc/pmap_clnt.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
|
|
|
|
/* former nfsmount.h */
|
|
|
|
#define MOUNTPORT 635
|
|
#define MNTPATHLEN 1024
|
|
#define MNTNAMLEN 255
|
|
#define FHSIZE 32
|
|
#define FHSIZE3 64
|
|
|
|
typedef char fhandle[FHSIZE];
|
|
|
|
typedef struct {
|
|
unsigned int fhandle3_len;
|
|
char *fhandle3_val;
|
|
} fhandle3;
|
|
|
|
enum mountstat3 {
|
|
MNT_OK = 0,
|
|
MNT3ERR_PERM = 1,
|
|
MNT3ERR_NOENT = 2,
|
|
MNT3ERR_IO = 5,
|
|
MNT3ERR_ACCES = 13,
|
|
MNT3ERR_NOTDIR = 20,
|
|
MNT3ERR_INVAL = 22,
|
|
MNT3ERR_NAMETOOLONG = 63,
|
|
MNT3ERR_NOTSUPP = 10004,
|
|
MNT3ERR_SERVERFAULT = 10006,
|
|
};
|
|
typedef enum mountstat3 mountstat3;
|
|
|
|
struct fhstatus {
|
|
unsigned int fhs_status;
|
|
union {
|
|
fhandle fhs_fhandle;
|
|
} fhstatus_u;
|
|
};
|
|
typedef struct fhstatus fhstatus;
|
|
|
|
struct mountres3_ok {
|
|
fhandle3 fhandle;
|
|
struct {
|
|
unsigned int auth_flavours_len;
|
|
char *auth_flavours_val;
|
|
} auth_flavours;
|
|
};
|
|
typedef struct mountres3_ok mountres3_ok;
|
|
|
|
struct mountres3 {
|
|
mountstat3 fhs_status;
|
|
union {
|
|
mountres3_ok mountinfo;
|
|
} mountres3_u;
|
|
};
|
|
typedef struct mountres3 mountres3;
|
|
|
|
typedef char *dirpath;
|
|
|
|
typedef char *name;
|
|
|
|
typedef struct mountbody *mountlist;
|
|
|
|
struct mountbody {
|
|
name ml_hostname;
|
|
dirpath ml_directory;
|
|
mountlist ml_next;
|
|
};
|
|
typedef struct mountbody mountbody;
|
|
|
|
typedef struct groupnode *groups;
|
|
|
|
struct groupnode {
|
|
name gr_name;
|
|
groups gr_next;
|
|
};
|
|
typedef struct groupnode groupnode;
|
|
|
|
typedef struct exportnode *exports;
|
|
|
|
struct exportnode {
|
|
dirpath ex_dir;
|
|
groups ex_groups;
|
|
exports ex_next;
|
|
};
|
|
typedef struct exportnode exportnode;
|
|
|
|
struct ppathcnf {
|
|
int pc_link_max;
|
|
short pc_max_canon;
|
|
short pc_max_input;
|
|
short pc_name_max;
|
|
short pc_path_max;
|
|
short pc_pipe_buf;
|
|
u_char pc_vdisable;
|
|
char pc_xxx;
|
|
short pc_mask[2];
|
|
};
|
|
typedef struct ppathcnf ppathcnf;
|
|
|
|
#define MOUNTPROG 100005
|
|
#define MOUNTVERS 1
|
|
|
|
#define MOUNTPROC_NULL 0
|
|
#define MOUNTPROC_MNT 1
|
|
#define MOUNTPROC_DUMP 2
|
|
#define MOUNTPROC_UMNT 3
|
|
#define MOUNTPROC_UMNTALL 4
|
|
#define MOUNTPROC_EXPORT 5
|
|
#define MOUNTPROC_EXPORTALL 6
|
|
|
|
#define MOUNTVERS_POSIX 2
|
|
|
|
#define MOUNTPROC_PATHCONF 7
|
|
|
|
#define MOUNT_V3 3
|
|
|
|
#define MOUNTPROC3_NULL 0
|
|
#define MOUNTPROC3_MNT 1
|
|
#define MOUNTPROC3_DUMP 2
|
|
#define MOUNTPROC3_UMNT 3
|
|
#define MOUNTPROC3_UMNTALL 4
|
|
#define MOUNTPROC3_EXPORT 5
|
|
|
|
/* former nfsmount.h ends */
|
|
|
|
enum {
|
|
#ifndef NFS_FHSIZE
|
|
NFS_FHSIZE = 32,
|
|
#endif
|
|
#ifndef NFS_PORT
|
|
NFS_PORT = 2049
|
|
#endif
|
|
};
|
|
|
|
//enum {
|
|
// S_QUOTA = 128, /* Quota initialized for file/directory/symlink */
|
|
//};
|
|
|
|
|
|
/*
|
|
* 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).
|
|
*/
|
|
|
|
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 HAVE_inet_aton
|
|
|
|
/*
|
|
* 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
|
|
|
|
// Convert each NFSERR_BLAH into EBLAH
|
|
|
|
static const struct {
|
|
int stat;
|
|
int errnum;
|
|
} nfs_errtbl[] = {
|
|
{0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST},
|
|
{19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG},
|
|
{28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT},
|
|
{70,ESTALE}, {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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp)
|
|
{
|
|
if (!xdr_string(xdrs, objp, MNTPATHLEN))
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp)
|
|
{
|
|
if (!xdr_fhandle3(xdrs, &objp->fhandle))
|
|
return FALSE;
|
|
if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0,
|
|
sizeof (int), (xdrproc_t) xdr_int))
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp)
|
|
{
|
|
if (!xdr_enum(xdrs, (enum_t *) objp))
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
|
|
|
|
/*
|
|
* nfs_mount_version according to the sources seen at compile time.
|
|
*/
|
|
static int nfs_mount_version;
|
|
static int kernel_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)
|
|
{
|
|
if (kernel_version)
|
|
return;
|
|
|
|
nfs_mount_version = 4; /* 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 v4 since 2.3.99pre4 */
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static int daemonize(void)
|
|
{
|
|
int fd;
|
|
int pid = fork();
|
|
if (pid < 0) /* error */
|
|
return -errno;
|
|
if (pid > 0) /* parent */
|
|
return 0;
|
|
/* child */
|
|
fd = xopen(bb_dev_null, O_RDWR);
|
|
dup2(fd, 0);
|
|
dup2(fd, 1);
|
|
dup2(fd, 2);
|
|
if (fd > 2) close(fd);
|
|
setsid();
|
|
openlog(bb_applet_name, LOG_PID, LOG_DAEMON);
|
|
logmode = LOGMODE_SYSLOG;
|
|
return 1;
|
|
}
|
|
|
|
// TODO
|
|
static inline int we_saw_this_host_before(const char *hostname)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* RPC strerror analogs are terminally idiotic:
|
|
* *mandatory* prefix and \n at end.
|
|
* This hopefully helps. Usage:
|
|
* error_msg_rpc(clnt_*error*(" ")) */
|
|
static void error_msg_rpc(const char *msg)
|
|
{
|
|
size_t len;
|
|
while (msg[0] == ' ' || msg[0] == ':') msg++;
|
|
len = strlen(msg);
|
|
while (len && msg[len-1] == '\n') len--;
|
|
bb_error_msg("%.*s", len, msg);
|
|
}
|
|
|
|
int nfsmount(struct mntent *mp, int vfsflags, char *filteropts)
|
|
{
|
|
CLIENT *mclient;
|
|
char *hostname;
|
|
char *pathname;
|
|
char *mounthost;
|
|
struct nfs_mount_data data;
|
|
char *opt;
|
|
struct hostent *hp;
|
|
struct sockaddr_in server_addr;
|
|
struct sockaddr_in mount_server_addr;
|
|
int msock, fsock;
|
|
union {
|
|
struct fhstatus nfsv2;
|
|
struct mountres3 nfsv3;
|
|
} status;
|
|
int daemonized;
|
|
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;
|
|
|
|
find_kernel_nfs_mount_version();
|
|
|
|
daemonized = 0;
|
|
mounthost = NULL;
|
|
retval = ETIMEDOUT;
|
|
msock = fsock = -1;
|
|
mclient = NULL;
|
|
|
|
/* NB: hostname, mounthost, filteropts must be free()d prior to return */
|
|
|
|
filteropts = xstrdup(filteropts); /* going to trash it later... */
|
|
|
|
hostname = xstrdup(mp->mnt_fsname);
|
|
/* mount_main() guarantees that ':' is there */
|
|
s = strchr(hostname, ':');
|
|
pathname = s + 1;
|
|
*s = '\0';
|
|
/* Ignore all but first hostname in replicated mounts
|
|
until they can be fully supported. (mack@sgi.com) */
|
|
s = strchr(hostname, ',');
|
|
if (s) {
|
|
*s = '\0';
|
|
bb_error_msg("warning: multiple hostnames not supported");
|
|
}
|
|
|
|
server_addr.sin_family = AF_INET;
|
|
#ifdef HAVE_inet_aton
|
|
if (!inet_aton(hostname, &server_addr.sin_addr))
|
|
#endif
|
|
{
|
|
hp = gethostbyname(hostname);
|
|
if (hp == NULL) {
|
|
bb_herror_msg("%s", hostname);
|
|
goto fail;
|
|
}
|
|
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 */
|
|
|
|
if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */
|
|
mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr));
|
|
} else {
|
|
char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts,
|
|
mp->mnt_opts[0] ? "," : "",
|
|
inet_ntoa(server_addr.sin_addr));
|
|
free(mp->mnt_opts);
|
|
mp->mnt_opts = tmp;
|
|
}
|
|
|
|
/* 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;
|
|
data.namlen = NAME_MAX;
|
|
|
|
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 = 100003;
|
|
nfsvers = 0;
|
|
|
|
/* parse options */
|
|
|
|
for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
|
|
char *opteq = strchr(opt, '=');
|
|
if (opteq) {
|
|
int 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 = 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
|
|
bb_error_msg("warning: unrecognized proto= option");
|
|
} else if (!strcmp(opt, "namlen")) {
|
|
if (nfs_mount_version >= 2)
|
|
data.namlen = val;
|
|
else
|
|
bb_error_msg("warning: option namlen is not supported\n");
|
|
} else if (!strcmp(opt, "addr"))
|
|
/* ignore */;
|
|
else {
|
|
bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
|
|
goto fail;
|
|
}
|
|
}
|
|
else {
|
|
int 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
|
|
bb_error_msg("warning: option nolock is not supported");
|
|
} else {
|
|
bb_error_msg("unknown nfs mount option: %s%s", 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)
|
|
data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
|
|
if (nfs_mount_version >= 3)
|
|
data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
|
|
if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
|
|
bb_error_msg("NFSv%d not supported", nfsvers);
|
|
goto fail;
|
|
}
|
|
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);
|
|
printf("tcp = %d\n",
|
|
(data.flags & NFS_MOUNT_TCP) != 0);
|
|
#endif
|
|
|
|
data.version = nfs_mount_version;
|
|
|
|
if (vfsflags & MS_REMOUNT)
|
|
goto do_mount;
|
|
|
|
/*
|
|
* 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 && we_saw_this_host_before(hostname)) {
|
|
daemonized = daemonize(); /* parent or error */
|
|
if (daemonized <= 0) { /* parent or error */
|
|
retval = -daemonized;
|
|
goto ret;
|
|
}
|
|
}
|
|
|
|
/* create mount daemon 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 {
|
|
hp = gethostbyname(mounthost);
|
|
if (hp == 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. When the mount
|
|
* times out, and the "bg" option is set, we background ourself
|
|
* and continue trying.
|
|
*
|
|
* 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.
|
|
*/
|
|
{
|
|
struct timeval total_timeout;
|
|
struct timeval retry_timeout;
|
|
struct pmap* pm_mnt;
|
|
time_t t;
|
|
time_t prevt;
|
|
time_t timeout;
|
|
|
|
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;
|
|
retry:
|
|
/* 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);
|
|
nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers;
|
|
|
|
/* 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) {
|
|
if (!daemonized && prevt == 0)
|
|
error_msg_rpc(clnt_spcreateerror(" "));
|
|
} else {
|
|
enum clnt_stat clnt_stat;
|
|
/* 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)
|
|
goto prepare_kernel_data; /* we're done */
|
|
if (errno != ECONNREFUSED) {
|
|
error_msg_rpc(clnt_sperror(mclient, " "));
|
|
goto fail; /* don't retry */
|
|
}
|
|
/* Connection refused */
|
|
if (!daemonized && prevt == 0) /* print just once */
|
|
error_msg_rpc(clnt_sperror(mclient, " "));
|
|
auth_destroy(mclient->cl_auth);
|
|
clnt_destroy(mclient);
|
|
mclient = 0;
|
|
close(msock);
|
|
}
|
|
|
|
/* Timeout. We are going to retry... maybe */
|
|
|
|
if (!bg)
|
|
goto fail;
|
|
if (!daemonized) {
|
|
daemonized = daemonize();
|
|
if (daemonized <= 0) { /* parent or error */
|
|
retval = -daemonized;
|
|
goto ret;
|
|
}
|
|
}
|
|
prevt = t;
|
|
t = time(NULL);
|
|
if (t >= timeout)
|
|
/* TODO error message */
|
|
goto fail;
|
|
|
|
goto retry;
|
|
}
|
|
|
|
prepare_kernel_data:
|
|
|
|
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);
|
|
data.root.size = NFS_FHSIZE;
|
|
memcpy(data.old_root.data,
|
|
(char *) status.nfsv2.fhstatus_u.fhs_fhandle,
|
|
NFS_FHSIZE);
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
/* create nfs socket for kernel */
|
|
|
|
if (tcp) {
|
|
if (nfs_mount_version < 3) {
|
|
bb_error_msg("NFS over TCP is not supported");
|
|
goto fail;
|
|
}
|
|
fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
|
|
} else
|
|
fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
if (fsock < 0) {
|
|
bb_perror_msg("nfs socket");
|
|
goto fail;
|
|
}
|
|
if (bindresvport(fsock, 0) < 0) {
|
|
bb_perror_msg("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 daemon\n", port);
|
|
#endif
|
|
server_addr.sin_port = htons(port);
|
|
|
|
/* 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);
|
|
|
|
if (bg) {
|
|
/* We must wait until mount directory is available */
|
|
struct stat statbuf;
|
|
int delay = 1;
|
|
while (stat(mp->mnt_dir, &statbuf) == -1) {
|
|
if (!daemonized) {
|
|
daemonized = daemonize();
|
|
if (daemonized <= 0) { /* parent or error */
|
|
retval = -daemonized;
|
|
goto ret;
|
|
}
|
|
}
|
|
sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */
|
|
delay *= 2;
|
|
if (delay > 30)
|
|
delay = 30;
|
|
}
|
|
}
|
|
|
|
do_mount: /* perform actual mount */
|
|
|
|
mp->mnt_type = "nfs";
|
|
retval = mount_it_now(mp, vfsflags, (char*)&data);
|
|
goto ret;
|
|
|
|
fail: /* abort */
|
|
|
|
if (msock != -1) {
|
|
if (mclient) {
|
|
auth_destroy(mclient->cl_auth);
|
|
clnt_destroy(mclient);
|
|
}
|
|
close(msock);
|
|
}
|
|
if (fsock != -1)
|
|
close(fsock);
|
|
|
|
ret:
|
|
free(hostname);
|
|
free(mounthost);
|
|
free(filteropts);
|
|
return retval;
|
|
}
|