static ssize_t write_ports(struct file *file, char *buf, size_t size)
{
if (size == 0) {
int len = 0;
lock_kernel();
if (nfsd_serv)
len = svc_sock_names(buf, nfsd_serv, NULL);
unlock_kernel();
return len;
}
/* Either a single 'fd' number is written, in which
* case it must be for a socket of a supported family/protocol,
* and we use it as an nfsd socket, or
* A '-' followed by the 'name' of a socket in which case
* we close the socket.
*/
if (isdigit(buf[0])) {
char *mesg = buf;
int fd;
int err;
err = get_int(&mesg, &fd);
if (err)
return -EINVAL;
if (fd < 0)
return -EINVAL;
err = nfsd_create_serv();
if (!err) {
int proto = 0;
err = svc_addsock(nfsd_serv, fd, buf, &proto);
if (err >= 0) {
err = lockd_up(proto);
if (err < 0)
svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf);
}
/* Decrease the count, but don't shutdown the
* the service
*/
lock_kernel();
nfsd_serv->sv_nrthreads--;
unlock_kernel();
}
return err < 0 ? err : 0;
}
if (buf[0] == '-') {
char *toclose = kstrdup(buf+1, GFP_KERNEL);
int len = 0;
if (!toclose)
return -ENOMEM;
lock_kernel();
if (nfsd_serv)
len = svc_sock_names(buf, nfsd_serv, toclose);
unlock_kernel();
if (len >= 0)
lockd_down();
kfree(toclose);
return len;
}
return -EINVAL;
}
/*
* A '-' followed by the 'name' of a socket means we close the socket.
*/
static ssize_t __write_ports_delfd(char *buf)
{
char *toclose;
int len = 0;
toclose = kstrdup(buf + 1, GFP_KERNEL);
if (toclose == NULL)
return -ENOMEM;
if (nfsd_serv != NULL)
len = svc_sock_names(nfsd_serv, buf,
SIMPLE_TRANSACTION_LIMIT, toclose);
kfree(toclose);
return len;
}
