/*
* NFS mount the kernel directory, and perform a lookup on the
* kernel file.
*
* Places the directory filehandle in global "dirfh"
* Places the kernel filehandle in global filefh
*
* returns 0 on success, nonzero on failure
*/
int
fileinit(struct in_addr ip, char *dirname, char *filename)
{
int mount_port;
char *readahead_option;
int err;
readahead_option = getenv("readahead");
if (readahead_option)
kimg_readahead = atoi(readahead_option);
if (kimg_readahead < 0)
dprintf("NFS using whole-file readahead\n");
else if (kimg_readahead > 0)
dprintf("NFS using %dkb readahead\n", kimg_readahead);
rpc_init();
/*
* Lookup NFS/MOUNTD ports for ROOT using PORTMAP.
*/
nfs_port = rpc_lookup(ip, PROG_NFS, 2);
mount_port = rpc_lookup(ip, PROG_MOUNT, 1);
if (nfs_port == -1 || mount_port == -1) {
printf("Can't get root NFS/MOUNT ports.\n");
return 1;
}
dprintf("fileinit: NFS port = %d, MOUNT port = %d\n",
nfs_port, mount_port);
/*
* NFS mount the directory.
*/
dprintf("Mounting %s ... ", dirname);
err = nfs_mount(ip, mount_port, dirname, dirfh);
if (err) {
printf("Can't mount filesystem: %s.\n", nfs_strerror(err));
return 1;
}
dprintf("done\n");
/*
* Lookup the file.
*/
dprintf("Looking up %s ... ", filename);
err = nfs_lookup(ip, nfs_port, dirfh, filename, filefh);
if (err) {
printf("Can't lookup %s: %s.\n", filename, nfs_strerror(err));
return 1;
}
dprintf("done\n");
/* Stash ipaddr for subsequent calls */
ipaddr.s_addr = ip.s_addr;
return 0;
}
static void
expand_format_string(int error, const char *fmt, char *buf, int buf_chars)
{
const char *from; /* pointer into fmt */
char *to; /* pointer into buf */
char *errmsg; /* expansion for %m */
char *trunc_msg = "Truncated NFS error message: ";
zoneid_t zoneid = getzoneid();
/*
* Copy the given format string into the result buffer, expanding
* %m as we go. If the result buffer is too short, complain and
* truncate the message. (We don't expect this to ever happen,
* though.)
*/
for (from = fmt, to = buf; *from; from++) {
if (to >= buf + buf_chars - 1) {
zprintf(zoneid, trunc_msg);
break;
}
if (*from == '%' && *(from+1) == 'm') {
errmsg = nfs_strerror(error);
/*
* If there's an error message and room to display
* it, copy it in. If there's no message or not
* enough room, try just printing an error number.
* (We assume that the error value is in a
* reasonable range.) If there's no room for
* anything, bail out.
*/
if (errmsg != NULL &&
strlen(buf) + strlen(errmsg) < buf_chars) {
(void) strcpy(to, errmsg);
to += strlen(errmsg);
} else if (strlen(buf) + strlen("error XXX") <
buf_chars) {
(void) sprintf(to, "error %d", error);
/*
* Don't try to guess how many characters
* were laid down.
*/
to = buf + strlen(buf);
} else {
zprintf(zoneid, trunc_msg);
break;
}
from++;
} else {
*to++ = *from;
}
}
*to = '\0';
}
/*
* Read a small block of data from the input file.
*/
int
fileread(oskit_addr_t file_ofs, void *buf, oskit_size_t size,
oskit_size_t *out_actual)
{
int n, bytes_read;
int offset;
char *bufp = buf;
int chunk_size;
int readahead;
#ifdef CYCLECOUNTS
unsigned long long before_cycles;
#endif
bytes_read = 0;
offset = file_ofs;
while (size > 0) {
chunk_size = min(NFS_READ_SIZE, size);
if (kimg_readahead < 0)
readahead = (size / NFS_READ_SIZE) - 1;
else
readahead = kimg_readahead;
GETCSTAMP(before_cycles);
n = nfs_read(ipaddr, nfs_port,
filefh, offset, chunk_size, bufp, readahead);
UPDATECSTAMP(total_readwait_cycles, before_cycles);
if (n < 0) {
printf("Unable to read text: %s\n", nfs_strerror(n));
return 1; /* XXX Should be an EX_ constant */
}
if (n == 0)
break; /* hit eof */
offset += n;
bufp += n;
size -= n;
bytes_read += n;
}
*out_actual = bytes_read;
return 0;
}
// NB: mp->xxx fields may be trashed on exit
static 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. ([email protected]) */
s = strchr(hostname, ',');
if (s) {
*s = '\0';
bb_error_msg("warning: multiple hostnames not supported");
}
server_addr.sin_family = AF_INET;
if (!inet_aton(hostname, &server_addr.sin_addr)) {
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 */
if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
char *opteq = strchr(opt, '=');
if (opteq) {
static const char *const options[] = {
/* 0 */ "rsize",
/* 1 */ "wsize",
/* 2 */ "timeo",
/* 3 */ "retrans",
/* 4 */ "acregmin",
/* 5 */ "acregmax",
/* 6 */ "acdirmin",
/* 7 */ "acdirmax",
/* 8 */ "actimeo",
/* 9 */ "retry",
/* 10 */ "port",
/* 11 */ "mountport",
/* 12 */ "mounthost",
/* 13 */ "mountprog",
/* 14 */ "mountvers",
/* 15 */ "nfsprog",
/* 16 */ "nfsvers",
/* 17 */ "vers",
/* 18 */ "proto",
/* 19 */ "namlen",
/* 20 */ "addr",
NULL
};
int val = xatoi_u(opteq + 1);
*opteq = '\0';
switch (index_in_str_array(options, opt)) {
case 0: // "rsize"
data.rsize = val;
break;
case 1: // "wsize"
data.wsize = val;
break;
case 2: // "timeo"
data.timeo = val;
break;
case 3: // "retrans"
data.retrans = val;
break;
case 4: // "acregmin"
data.acregmin = val;
break;
case 5: // "acregmax"
data.acregmax = val;
break;
case 6: // "acdirmin"
data.acdirmin = val;
break;
case 7: // "acdirmax"
data.acdirmax = val;
break;
case 8: // "actimeo"
data.acregmin = val;
data.acregmax = val;
data.acdirmin = val;
data.acdirmax = val;
break;
case 9: // "retry"
retry = val;
break;
case 10: // "port"
port = val;
break;
case 11: // "mountport"
mountport = val;
break;
case 12: // "mounthost"
mounthost = xstrndup(opteq+1,
strcspn(opteq+1," \t\n\r,"));
break;
case 13: // "mountprog"
mountprog = val;
break;
case 14: // "mountvers"
mountvers = val;
break;
case 15: // "nfsprog"
nfsprog = val;
break;
case 16: // "nfsvers"
case 17: // "vers"
nfsvers = val;
break;
case 18: // "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");
break;
case 19: // "namlen"
if (nfs_mount_version >= 2)
data.namlen = val;
else
bb_error_msg("warning: option namlen is not supported\n");
break;
case 20: // "addr" - ignore
break;
default:
bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
goto fail;
}
}
else {
static const char *const options[] = {
"bg",
"fg",
"soft",
"hard",
"intr",
"posix",
"cto",
"ac",
"tcp",
"udp",
"lock",
NULL
};
int val = 1;
if (!strncmp(opt, "no", 2)) {
val = 0;
opt += 2;
}
switch (index_in_str_array(options, opt)) {
case 0: // "bg"
bg = val;
break;
case 1: // "fg"
bg = !val;
break;
case 2: // "soft"
soft = val;
break;
case 3: // "hard"
soft = !val;
break;
case 4: // "intr"
intr = val;
break;
case 5: // "posix"
posix = val;
break;
case 6: // "cto"
nocto = !val;
break;
case 7: // "ac"
noac = !val;
break;
case 8: // "tcp"
tcp = val;
break;
case 9: // "udp"
tcp = !val;
break;
case 10: // "lock"
if (nfs_mount_version >= 3)
nolock = !val;
else
bb_error_msg("warning: option nolock is not supported");
break;
default:
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;
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;
}
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 = (char*)"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;
}
int nfsmount(const char *spec, const char *node, int *flags,
char **extra_opts, 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;
static 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. ([email protected]) */
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 = *extra_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);
*extra_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) {
bb_error_msg("NFSv%d not supported!", nfsvers);
return 0;
}
if (mountvers > MAX_NFSPROT) {
bb_error_msg("NFSv%d not supported!", nfsvers);
return 0;
}
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;
*mount_opts = (char *) &data;
if (*flags & MS_REMOUNT)
return 0;
/*
* 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_kernel_revision() <= 66314
&& 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);
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;
}
int
nfsmount(const char *spec, const char *node, int flags,
char **extra_opts, int fake, int running_bg)
{
char hostdir[1024];
char *hostname, *dirname, *old_opts, *mounthost = NULL;
char new_opts[1024], cbuf[1024];
static struct nfs_mount_data data;
int val;
static int doonce = 0;
clnt_addr_t mnt_server = { &mounthost, };
clnt_addr_t nfs_server = { &hostname, };
struct sockaddr_in *nfs_saddr = &nfs_server.saddr;
struct pmap *mnt_pmap = &mnt_server.pmap,
*nfs_pmap = &nfs_server.pmap;
struct pmap save_mnt, save_nfs;
int fsock = -1;
mntres_t mntres;
struct stat statbuf;
char *s;
int bg, retry;
int retval = EX_FAIL;
time_t t;
time_t prevt;
time_t timeout;
if (strlen(spec) >= sizeof(hostdir)) {
nfs_error(_("%s: excessively long host:dir argument"),
progname);
goto fail;
}
strcpy(hostdir, spec);
if ((s = strchr(hostdir, ':'))) {
hostname = hostdir;
dirname = s + 1;
*s = '\0';
/* Ignore all but first hostname in replicated mounts
until they can be fully supported. ([email protected]) */
if ((s = strchr(hostdir, ','))) {
*s = '\0';
nfs_error(_("%s: warning: "
"multiple hostnames not supported"),
progname);
}
} else {
nfs_error(_("%s: directory to mount not in host:dir format"),
progname);
goto fail;
}
if (!nfs_gethostbyname(hostname, nfs_saddr))
goto fail;
mounthost = hostname;
memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
/* add IP address to mtab options for use when unmounting */
s = inet_ntoa(nfs_saddr->sin_addr);
old_opts = *extra_opts;
if (!old_opts)
old_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.acregmin = 3;
data.acregmax = 60;
data.acdirmin = 30;
data.acdirmax = 60;
#if NFS_MOUNT_VERSION >= 2
data.namlen = NAME_MAX;
#endif
bg = 0;
retry = -1;
memset(mnt_pmap, 0, sizeof(*mnt_pmap));
mnt_pmap->pm_prog = MOUNTPROG;
memset(nfs_pmap, 0, sizeof(*nfs_pmap));
nfs_pmap->pm_prog = NFS_PROGRAM;
/* parse options */
new_opts[0] = 0;
if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
new_opts, sizeof(new_opts)))
goto fail;
if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
goto fail;
if (retry == -1) {
if (bg)
retry = 10000; /* 10000 mins == ~1 week*/
else
retry = 2; /* 2 min default on fg mounts */
}
#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 = %lu, bg = %d, retry = %d, flags = %.8x\n"),
nfs_pmap->pm_port, bg, retry, data.flags);
printf(_("mountprog = %lu, mountvers = %lu, nfsprog = %lu, nfsvers = %lu\n"),
mnt_pmap->pm_prog, mnt_pmap->pm_vers,
nfs_pmap->pm_prog, nfs_pmap->pm_vers);
printf(_("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d"),
(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"),
(data.flags & NFS_MOUNT_TCP) != 0);
#endif
#if NFS_MOUNT_VERSION >= 4
printf(_(", noacl = %d"), (data.flags & NFS_MOUNT_NOACL) != 0);
#endif
#if NFS_MOUNT_VERSION >= 5
printf(_(", sec = %u"), data.pseudoflavor);
printf(_(", readdirplus = %d"), (data.flags & NFS_MOUNT_NORDIRPLUS) != 0);
#endif
printf("\n");
#endif
data.version = nfs_mount_data_version;
if (flags & MS_REMOUNT)
goto out_ok;
/* create mount deamon client */
/*
* 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.
*/
timeout = time(NULL) + 60 * retry;
prevt = 0;
t = 30;
val = 1;
memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
for (;;) {
if (bg && stat(node, &statbuf) == -1) {
/* no mount point yet - sleep */
if (running_bg) {
sleep(val); /* 1, 2, 4, 8, 16, 30, ... */
val *= 2;
if (val > 30)
val = 30;
}
} else {
int stat;
/* be careful not to use too many CPU cycles */
if (t - prevt < 30)
sleep(30);
stat = nfs_call_mount(&mnt_server, &nfs_server,
&dirname, &mntres);
if (stat)
break;
memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
prevt = t;
}
if (!bg) {
switch(rpc_createerr.cf_stat){
case RPC_TIMEDOUT:
break;
case RPC_SYSTEMERROR:
if (errno == ETIMEDOUT)
break;
default:
rpc_mount_errors(*nfs_server.hostname, 0, bg);
goto fail;
}
t = time(NULL);
if (t >= timeout) {
rpc_mount_errors(*nfs_server.hostname, 0, bg);
goto fail;
}
rpc_mount_errors(*nfs_server.hostname, 1, bg);
continue;
}
if (!running_bg) {
if (retry > 0)
retval = EX_BG;
goto fail;
}
t = time(NULL);
if (t >= timeout) {
rpc_mount_errors(*nfs_server.hostname, 0, bg);
goto fail;
}
if (doonce++ < 1)
rpc_mount_errors(*nfs_server.hostname, 1, bg);
}
if (mnt_pmap->pm_vers <= 2) {
if (mntres.nfsv2.fhs_status != 0) {
nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
progname, hostname, dirname,
nfs_strerror(mntres.nfsv2.fhs_status));
goto fail;
}
memcpy(data.root.data,
(char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
NFS_FHSIZE);
#if NFS_MOUNT_VERSION >= 4
data.root.size = NFS_FHSIZE;
memcpy(data.old_root.data,
(char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
NFS_FHSIZE);
#endif
} else {
#if NFS_MOUNT_VERSION >= 4
mountres3_ok *mountres;
fhandle3 *fhandle;
int i, n_flavors, *flavor, yum = 0;
if (mntres.nfsv3.fhs_status != 0) {
nfs_error(_("%s: %s:%s failed, reason given by server: %s"),
progname, hostname, dirname,
nfs_strerror(mntres.nfsv3.fhs_status));
goto fail;
}
#if NFS_MOUNT_VERSION >= 5
mountres = &mntres.nfsv3.mountres3_u.mountinfo;
n_flavors = mountres->auth_flavors.auth_flavors_len;
if (n_flavors <= 0)
goto noauth_flavors;
flavor = mountres->auth_flavors.auth_flavors_val;
for (i = 0; i < n_flavors; ++i) {
/*
* Per RFC2623, section 2.7, we should prefer the
* flavour listed first.
* If no flavour requested, use the first simple
* flavour that is offered.
*/
if (! (data.flags & NFS_MOUNT_SECFLAVOUR) &&
(flavor[i] == AUTH_SYS ||
flavor[i] == AUTH_NONE)) {
data.pseudoflavor = flavor[i];
data.flags |= NFS_MOUNT_SECFLAVOUR;
}
if (flavor[i] == data.pseudoflavor)
yum = 1;
#ifdef NFS_MOUNT_DEBUG
printf(_("auth flavor %d: %d\n"), i, flavor[i]);
#endif
}
if (!yum) {
nfs_error(_("%s: %s:%s failed, security flavor "
"not supported"),
progname, hostname, dirname);
/* server has registered us in rmtab, send umount */
nfs_call_umount(&mnt_server, &dirname);
goto fail;
}
noauth_flavors:
#endif
fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
memset(data.old_root.data, 0, NFS_FHSIZE);
memset(&data.root, 0, sizeof(data.root));
data.root.size = fhandle->fhandle3_len;
memcpy(data.root.data,
(char *) fhandle->fhandle3_val,
fhandle->fhandle3_len);
data.flags |= NFS_MOUNT_VER3;
#endif
}
if (nfs_mount_data_version == 1) {
/* create nfs socket for kernel */
if (nfs_pmap->pm_prot == IPPROTO_TCP)
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;
}
}
#ifdef NFS_MOUNT_DEBUG
printf(_("using port %lu for nfs deamon\n"), nfs_pmap->pm_port);
#endif
nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
/*
* connect() the socket for kernels 1.3.10 and below only,
* to avoid problems with multihomed hosts.
* --Swen
*/
if (linux_version_code() <= MAKE_VERSION(1, 3, 10) && fsock != -1
&& connect(fsock, (struct sockaddr *) nfs_saddr,
sizeof (*nfs_saddr)) < 0) {
perror(_("nfs connect"));
goto fail;
}
#if NFS_MOUNT_VERSION >= 2
if (nfs_pmap->pm_prot == IPPROTO_TCP)
data.flags |= NFS_MOUNT_TCP;
else
data.flags &= ~NFS_MOUNT_TCP;
#endif
/* prepare data structure for kernel */
data.fd = fsock;
memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
strncpy(data.hostname, hostname, sizeof(data.hostname));
out_ok:
/* Ensure we have enough padding for the following strcat()s */
if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
nfs_error(_("%s: excessively long option argument"),
progname);
goto fail;
}
snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
strcat(new_opts, cbuf);
*extra_opts = xstrdup(new_opts);
if (!fake && !(data.flags & NFS_MOUNT_NONLM)) {
if (!start_statd()) {
nfs_error(_("%s: rpc.statd is not running but is "
"required for remote locking.\n"
" Either use '-o nolock' to keep "
"locks local, or start statd."),
progname);
goto fail;
}
}
if (!fake) {
if (mount(spec, node, "nfs",
flags & ~(MS_USER|MS_USERS), &data)) {
mount_error(spec, node, errno);
goto fail;
}
}
return EX_SUCCESS;
/* abort */
fail:
if (fsock != -1)
close(fsock);
return retval;
}
int nfsmount(const char *spec, const char *node, int *flags,
char **orig_opts, char **extra_opts)
{
char hostdir[1024];
CLIENT *mclient;
char *hostname;
char *dirname;
char new_opts[1024];
fhandle root_fhandle;
struct timeval total_timeout;
enum clnt_stat clnt_stat;
static struct nfs_mount_data data;
char *opts, *opt, *opteq;
int val;
struct hostent *hp;
struct sockaddr_in server_addr;
int msock, fsock;
struct timeval pertry_timeout;
struct fhstatus status;
char *s;
int port;
int bg;
int soft;
int intr;
int posix;
int nocto;
int noac;
int retry;
msock = fsock = -1;
mclient = NULL;
strcpy(hostdir, spec);
if ((s = (strchr(hostdir, ':')))) {
hostname = hostdir;
dirname = s + 1;
*s = '\0';
}
else {
fprintf(stderr, "mount: "
"directory to mount not in host:dir format\n");
goto fail;
}
if (hostname[0] >= '0' && hostname[0] <= '9') {
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(hostname);
}
else if ((hp = gethostbyname(hostname)) == NULL) {
fprintf(stderr, "mount: can't get address for %s\n", hostname);
goto fail;
}
else {
server_addr.sin_family = AF_INET;
memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length);
}
/* add IP address to mtab options for use when unmounting */
sprintf(new_opts, "%s%saddr=%s",
*orig_opts ? *orig_opts : "",
*orig_opts ? "," : "",
inet_ntoa(server_addr.sin_addr));
*orig_opts = strdup(new_opts);
/* set default options */
data.rsize = 0; /* let kernel decide */
data.wsize = 0; /* let kernel decide */
data.timeo = 7;
data.retrans = 3;
data.acregmin = 3;
data.acregmax = 60;
data.acdirmin = 30;
data.acdirmax = 60;
port = 2049;
bg = 0;
soft = 0;
intr = 0;
posix = 0;
nocto = 0;
noac = 0;
retry = 10000;
/* parse options */
if ((opts = *extra_opts)) {
for (opt = strtok(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, "port"))
port = val;
else if (!strcmp(opt, "retry"))
retry = val;
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 {
printf("unknown nfs mount option: "
"%s%s\n", val ? "" : "no", opt);
goto fail;
}
}
}
}
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 0
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("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);
goto fail;
#endif
/* create mount deamon client */
pertry_timeout.tv_sec = 3;
pertry_timeout.tv_usec = 0;
total_timeout.tv_sec = 20;
total_timeout.tv_usec = 0;
server_addr.sin_port = 0;
msock = RPC_ANYSOCK;
if ((mclient = clntudp_create(&server_addr, MOUNTPROG, MOUNTVERS,
pertry_timeout, &msock)) == NULL) {
clnt_pcreateerror("mount clntudp_create");
goto fail;
}
mclient->cl_auth = authunix_create_default();
/* try to mount hostname:dirname */
clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
xdr_dirpath, &dirname,
xdr_fhstatus, &status,
total_timeout);
if (clnt_stat != RPC_SUCCESS) {
clnt_perror(mclient, "rpc mount");
goto fail;
}
if (status.fhs_status != 0) {
fprintf(stderr,
"mount: %s:%s failed, reason given by server: %s\n",
hostname, dirname, nfs_strerror(status.fhs_status));
goto fail;
}
memcpy((char *) &root_fhandle, (char *) status.fhstatus_u.fhs_fhandle,
sizeof (root_fhandle));
/* create nfs socket for kernel */
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;
}
server_addr.sin_port = htons(port);
if (connect(fsock, (struct sockaddr *) &server_addr,
sizeof (server_addr)) < 0) {
perror("nfs connect");
goto fail;
}
/* prepare data structure for kernel */
data.version = NFS_MOUNT_VERSION;
data.fd = fsock;
memcpy((char *) &data.root, (char *) &root_fhandle,
sizeof (root_fhandle));
memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
strncpy(data.hostname, hostname, sizeof(data.hostname));
*extra_opts = (char *) &data;
/* clean up */
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
close(msock);
return 0;
/* abort */
fail:
if (msock != -1) {
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
close(msock);
}
if (fsock != -1)
close(fsock);
return 1;
}
