/**
* getfh - ask the kernel for an NFSv2 file handle via nfsctl()
* @sin: pointer to IPv4 address of a client
* @path: pointer to a '\0'-terminated ASCII string containing an pathname
*
* Returns a pointer to an NFSv2 file handle, or NULL if some error
* occurred. errno is set to reflect the specifics of the error.
*/
struct nfs_fh_len *
getfh(const struct sockaddr_in *sin, const char *path)
{
static union nfsctl_res res;
struct nfsctl_arg arg;
static struct nfs_fh_len rfh;
if (sin->sin_family != AF_INET) {
errno = EAFNOSUPPORT;
return NULL;
}
memset(&arg, 0, sizeof(arg));
memset(&res, 0, sizeof(res));
arg.ca_version = NFSCTL_VERSION;
arg.ca_getfd.gd_version = 2; /* obsolete */
strncpy(arg.ca_getfd.gd_path, path,
sizeof(arg.ca_getfd.gd_path) - 1);
arg.ca_getfd.gd_path[sizeof (arg.ca_getfd.gd_path) - 1] = '\0';
memcpy(&arg.ca_getfd.gd_addr, sin, sizeof(*sin));
if (nfsctl(NFSCTL_GETFD, &arg, &res) < 0)
return NULL;
memset(&rfh, 0, sizeof(rfh));
rfh.fh_size = 32;
memcpy(rfh.fh_handle, &res.cr_getfh, 32);
return &rfh;
}
/**
* getfh_old - ask the kernel for an NFSv2 file handle via nfsctl()
* @sin: pointer to IPv4 address of a client
* @dev: device number of device where requested object resides
* @ino: inode number of requested object
*
* Returns a pointer to an NFSv2 file handle, or NULL if some error
* occurred. errno is set to reflect the specifics of the error.
*/
struct nfs_fh_len *
getfh_old(const struct sockaddr_in *sin, const dev_t dev, const ino_t ino)
{
union nfsctl_res res;
struct nfsctl_arg arg;
static struct nfs_fh_len rfh;
if (sin->sin_family != AF_INET) {
errno = EAFNOSUPPORT;
return NULL;
}
memset(&arg, 0, sizeof(arg));
memset(&res, 0, sizeof(res));
arg.ca_version = NFSCTL_VERSION;
arg.ca_getfh.gf_version = 2; /* obsolete */
arg.ca_getfh.gf_dev = dev;
arg.ca_getfh.gf_ino = ino;
memcpy(&arg.ca_getfh.gf_addr, sin, sizeof(*sin));
if (nfsctl(NFSCTL_GETFH, &arg, &res) < 0)
return NULL;
memset(&rfh, 0, sizeof(rfh));
rfh.fh_size = 32;
memcpy(rfh.fh_handle, &res.cr_getfh, 32);
return &rfh;
}
/**
* getfh_size - ask the kernel for a file handle via nfsctl()
* @sin: pointer to IPv4 address of a client
* @path: pointer to a '\0'-terminated ASCII string containing an pathname
* @size: maximum size, in bytes, of the returned file handle
*
* Returns a pointer to an NFSv3 file handle, or NULL if some error
* occurred. errno is set to reflect the specifics of the error.
*/
struct nfs_fh_len *
getfh_size(const struct sockaddr_in *sin, const char *path, const int size)
{
static union nfsctl_res res;
struct nfsctl_arg arg;
if (sin->sin_family != AF_INET) {
errno = EAFNOSUPPORT;
return NULL;
}
memset(&arg, 0, sizeof(arg));
memset(&res, 0, sizeof(res));
arg.ca_version = NFSCTL_VERSION;
strncpy(arg.ca_getfs.gd_path, path,
sizeof(arg.ca_getfs.gd_path) - 1);
arg.ca_getfs.gd_path[sizeof (arg.ca_getfs.gd_path) - 1] = '\0';
memcpy(&arg.ca_getfs.gd_addr, sin, sizeof(*sin));
arg.ca_getfs.gd_maxlen = size;
if (nfsctl(NFSCTL_GETFS, &arg, &res) < 0)
return NULL;
return &res.cr_getfs;
}
int
lockdsvc()
{
struct nfsctl_arg arg;
arg.ca_version = NFSCTL_VERSION;
return nfsctl(LOCKDCTL_SVC, &arg, NULL);
}
struct nfs_fh_len *
getfh_size(struct sockaddr *addr, const char *path, int size)
{
static union nfsctl_res res;
struct nfsctl_arg arg;
arg.ca_version = NFSCTL_VERSION;
strncpy(arg.ca_getfs.gd_path, path,
sizeof(arg.ca_getfs.gd_path) - 1);
arg.ca_getfs.gd_path[sizeof (arg.ca_getfs.gd_path) - 1] = '\0';
memcpy(&arg.ca_getfs.gd_addr, addr, sizeof(struct sockaddr_in));
arg.ca_getfs.gd_maxlen = size;
if (nfsctl(NFSCTL_GETFS, &arg, &res) < 0)
return NULL;
return &res.cr_getfs;
}
struct nfs_fh_len *
getfh_old (struct sockaddr *addr, dev_t dev, ino_t ino)
{
union nfsctl_res res;
struct nfsctl_arg arg;
static struct nfs_fh_len rfh;
arg.ca_version = NFSCTL_VERSION;
arg.ca_getfh.gf_version = 2; /* obsolete */
arg.ca_getfh.gf_dev = dev;
arg.ca_getfh.gf_ino = ino;
memcpy(&arg.ca_getfh.gf_addr, addr, sizeof(struct sockaddr_in));
if (nfsctl(NFSCTL_GETFH, &arg, &res) < 0)
return NULL;
rfh.fh_size = 32;
memcpy(rfh.fh_handle, &res.cr_getfh, 32);
return &rfh;
}
struct nfs_fh_len *
getfh(struct sockaddr *addr, const char *path)
{
static union nfsctl_res res;
struct nfsctl_arg arg;
static struct nfs_fh_len rfh;
arg.ca_version = NFSCTL_VERSION;
arg.ca_getfd.gd_version = 2; /* obsolete */
strncpy(arg.ca_getfd.gd_path, path,
sizeof(arg.ca_getfd.gd_path) - 1);
arg.ca_getfd.gd_path[sizeof (arg.ca_getfd.gd_path) - 1] = '\0';
memcpy(&arg.ca_getfd.gd_addr, addr, sizeof(struct sockaddr_in));
if (nfsctl(NFSCTL_GETFD, &arg, &res) < 0)
return NULL;
rfh.fh_size = 32;
memcpy(rfh.fh_handle, &res.cr_getfh, 32);
return &rfh;
}
int
nfssvc_threads(unsigned short port, const int nrservs)
{
struct nfsctl_arg arg;
struct servent *ent;
ssize_t n;
int fd;
fd = open(NFSD_THREAD_FILE, O_WRONLY);
if (fd < 0)
fd = open("/proc/fs/nfs/threads", O_WRONLY);
if (fd >= 0) {
/* 2.5+ kernel with nfsd filesystem mounted.
* Just write the number of threads.
*/
snprintf(buf, sizeof(buf), "%d\n", nrservs);
n = write(fd, buf, strlen(buf));
close(fd);
if (n != (ssize_t)strlen(buf))
return -1;
else
return 0;
}
if (!port) {
ent = getservbyname("nfs", "udp");
if (ent != NULL)
port = ntohs(ent->s_port);
else
port = NFS_PORT;
}
arg.ca_version = NFSCTL_VERSION;
arg.ca_svc.svc_nthreads = nrservs;
arg.ca_svc.svc_port = port;
return nfsctl(NFSCTL_SVC, &arg, NULL);
}
