1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Copyright (C) 2001 Ridgerun,Inc (glonnon@ridgerun.com)
4 * Licensed under the GPL
5 */
6
7#include <stddef.h>
8#include <unistd.h>
9#include <errno.h>
10#include <sched.h>
11#include <signal.h>
12#include <string.h>
13#include <netinet/in.h>
14#include <sys/time.h>
15#include <sys/socket.h>
16#include <sys/mman.h>
17#include <sys/param.h>
18#include <endian.h>
19#include <byteswap.h>
20
21#include "ubd.h"
22#include <os.h>
23
24int start_io_thread(unsigned long sp, int *fd_out)
25{
26	int pid, fds[2], err;
27
28	err = os_pipe(fds, 1, 1);
29	if(err < 0){
30		printk("start_io_thread - os_pipe failed, err = %d\n", -err);
31		goto out;
32	}
33
34	kernel_fd = fds[0];
35	*fd_out = fds[1];
36
37	err = os_set_fd_block(*fd_out, 0);
38	if (err) {
39		printk("start_io_thread - failed to set nonblocking I/O.\n");
40		goto out_close;
41	}
42
43	pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM, NULL);
44	if(pid < 0){
45		err = -errno;
46		printk("start_io_thread - clone failed : errno = %d\n", errno);
47		goto out_close;
48	}
49
50	return(pid);
51
52 out_close:
53	os_close_file(fds[0]);
54	os_close_file(fds[1]);
55	kernel_fd = -1;
56	*fd_out = -1;
57 out:
58	return err;
59}
60