tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
24void ignore_sigwinch_sig(void)
25{
26 signal(SIGWINCH, SIG_IGN);
27}
28
29int start_io_thread(unsigned long sp, int *fd_out)
30{
31 int pid, fds[2], err;
32
33 err = os_pipe(fds, 1, 1);
34 if(err < 0){
35 printk("start_io_thread - os_pipe failed, err = %d\n", -err);
36 goto out;
37 }
38
39 kernel_fd = fds[0];
40 *fd_out = fds[1];
41
42 err = os_set_fd_block(*fd_out, 0);
43 if (err) {
44 printk("start_io_thread - failed to set nonblocking I/O.\n");
45 goto out_close;
46 }
47
48 pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM, NULL);
49 if(pid < 0){
50 err = -errno;
51 printk("start_io_thread - clone failed : errno = %d\n", errno);
52 goto out_close;
53 }
54
55 return(pid);
56
57 out_close:
58 os_close_file(fds[0]);
59 os_close_file(fds[1]);
60 kernel_fd = -1;
61 *fd_out = -1;
62 out:
63 return err;
64}