int FAST_FUNC bb_init_module(const char *filename, const char *options)
{
size_t len;
char *image;
int rc;
if (!options)
options = "";
#if ENABLE_FEATURE_2_4_MODULES
if (get_linux_version_code() < KERNEL_VERSION(2,6,0))
return bb_init_module_24(filename, options);
#endif
/* Use the 2.6 way */
len = INT_MAX - 4095;
rc = ENOENT;
image = xmalloc_open_zipped_read_close(filename, &len);
if (image) {
rc = 0;
if (init_module(image, len, options) != 0)
rc = errno;
free(image);
}
return rc;
}
/*
* 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 */
}
}
int rmmod_main(int argc UNUSED_PARAM, char **argv)
{
int n, err;
unsigned flags = O_NONBLOCK | O_EXCL;
/* Parse command line. */
n = getopt32(argv, "wfas"); // -s ignored
argv += optind;
if (n & 1) // --wait
flags &= ~O_NONBLOCK;
if (n & 2) // --force
flags |= O_TRUNC;
if (n & 4) {
/* Unload _all_ unused modules via NULL delete_module() call */
err = bb_delete_module(NULL, flags);
if (err && err != EFAULT)
bb_perror_msg_and_die("rmmod");
return EXIT_SUCCESS;
}
if (!*argv)
bb_show_usage();
n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
while (*argv) {
char modname[MODULE_NAME_LEN];
const char *bname;
bname = bb_basename(*argv++);
if (n)
safe_strncpy(modname, bname, MODULE_NAME_LEN);
else
filename2modname(bname, modname);
err = bb_delete_module(modname, flags);
if (err)
bb_perror_msg_and_die("can't unload module '%s'",
modname);
}
return EXIT_SUCCESS;
}
static inline void filename2modname(char *modname, const char *afterslash)
{
unsigned int i;
#if ENABLE_FEATURE_2_4_MODULES
int kr_chk = 1;
if (get_linux_version_code() <= KERNEL_VERSION(2,6,0))
kr_chk = 0;
#else
#define kr_chk 1
#endif
/* Convert to underscores, stop at first . */
for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
if (kr_chk && (afterslash[i] == '-'))
modname[i] = '_';
else
modname[i] = afterslash[i];
}
modname[i] = '\0';
}
/* Return:
* 0 on success,
* -errno on open/read error,
* errno on init_module() error
*/
int FAST_FUNC bb_init_module(const char *filename, const char *options)
{
size_t image_size;
char *image;
int rc;
bool mmaped;
if (!options)
options = "";
//TODO: audit bb_init_module_24 to match error code convention
#if ENABLE_FEATURE_2_4_MODULES
if (get_linux_version_code() < KERNEL_VERSION(2,6,0))
return bb_init_module_24(filename, options);
#endif
image_size = INT_MAX - 4095;
mmaped = 0;
image = try_to_mmap_module(filename, &image_size);
if (image) {
mmaped = 1;
} else {
errno = ENOMEM; /* may be changed by e.g. open errors below */
image = xmalloc_open_zipped_read_close(filename, &image_size);
if (!image)
return -errno;
}
errno = 0;
init_module(image, image_size, options);
rc = errno;
if (mmaped)
munmap(image, image_size);
else
free(image);
return rc;
}
/*
* 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;
}
int mkswap_main(int argc, char **argv)
{
char *tmp;
struct stat statbuf;
int sz;
int maxpages;
int goodpages;
#ifdef __sparc__
int force = 0;
#endif
init_signature_page(); /* get pagesize */
bb_opt_complementally = "?"; /* call bb_show_usage internally */
sz = bb_getopt_ulflags(argc, argv, "+cfv:", &tmp);
if (sz & 1)
check = 1;
#ifdef __sparc__
if (sz & 2)
force = 1;
#endif
#if ENABLE_FEATURE_MKSWAP_V0
if (sz & 4) {
version = bb_xgetlarg(tmp, 10, 0, 1);
} else {
if (get_linux_version_code() < KERNEL_VERSION(2, 1, 117))
version = 0;
else
version = 1;
}
#endif
argv += optind;
argc -= optind;
goodpages = pagesize / 1024; /* cache division */
while (argc--) {
if (device_name) {
PAGES = bb_xgetlarg(argv[0], 0, 10, sz * goodpages) / goodpages;
argc = 0; /* ignore any surplus args.. */
} else {
device_name = argv[0];
sz = get_size(device_name);
argv++;
}
}
if (!device_name) {
bb_error_msg_and_die("error: Nowhere to set up swap on?");
}
if (!PAGES) {
PAGES = sz;
}
#if 0
maxpages = ((version == 0) ? V0_MAX_PAGES : V1_MAX_PAGES);
#else
if (!version)
maxpages = V0_MAX_PAGES;
else if (get_linux_version_code() >= KERNEL_VERSION(2,2,1))
maxpages = V1_MAX_PAGES;
else {
maxpages = V1_OLD_MAX_PAGES;
if (maxpages > V1_MAX_PAGES)
maxpages = V1_MAX_PAGES;
}
#endif
if (PAGES > maxpages) {
PAGES = maxpages;
bb_error_msg("warning: truncating swap area to %ldkB",
PAGES * goodpages);
}
DEV = bb_xopen3(device_name, O_RDWR, 0);
if (fstat(DEV, &statbuf) < 0)
bb_perror_msg_and_die("%s", device_name);
if (!S_ISBLK(statbuf.st_mode))
check = 0;
else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
bb_error_msg_and_die("Will not try to make swapdevice on '%s'", device_name);
#ifdef __sparc__
if (!force && version == 0) {
/* Don't overwrite partition table unless forced */
unsigned char *buffer = (unsigned char *) signature_page;
unsigned short *q, sum;
if (read(DEV, buffer, 512) != 512)
bb_error_msg_and_die("fatal: first page unreadable");
if (buffer[508] == 0xDA && buffer[509] == 0xBE) {
q = (unsigned short *) (buffer + 510);
for (sum = 0; q >= (unsigned short *) buffer;)
sum ^= *q--;
if (!sum) {
bb_error_msg("Device '%s' contains a valid Sun disklabel.\n"
"This probably means creating v0 swap would destroy your partition table\n"
"No swap created. If you really want to create swap v0 on that device, use\n"
"the -f option to force it.", device_name);
return EXIT_FAILURE;
}
}
}
#endif
if (version == 0 || check)
check_blocks();
if (version == 0 && !bit_test_and_clear(signature_page, 0))
bb_error_msg_and_die("fatal: first page unreadable");
if (version == 1) {
p->swap_version = version;
p->last_page = PAGES - 1;
p->nr_badpages = badpages;
}
goodpages = PAGES - badpages - 1;
if (goodpages <= 0)
bb_error_msg_and_die("Unable to set up swap-space: unreadable");
printf("Setting up swapspace version %d, size = %ld bytes\n",
version, (long) (goodpages * pagesize));
write_signature((version == 0) ? "SWAP-SPACE" : "SWAPSPACE2");
sz = ((version == 0) ? 0 : 1024); /* offset */
if (lseek(DEV, sz, SEEK_SET) != sz)
bb_error_msg_and_die("unable to rewind swap-device");
goodpages = pagesize - sz; /* cache substraction */
if (write(DEV, (char *) signature_page + sz, goodpages)
!= goodpages)
bb_error_msg_and_die("unable to write signature page");
/*
* A subsequent swapon() will fail if the signature
* is not actually on disk. (This is a kernel bug.)
*/
if (fsync(DEV))
bb_error_msg_and_die("fsync failed");
if (ENABLE_FEATURE_CLEAN_UP) {
close(DEV);
free(signature_page);
}
return EXIT_SUCCESS;
}
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. ([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 = *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 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 {
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 daemon\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;
}
