68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
|
||
|
|
* Copyright (C) 2001 Ridgerun,Inc (glonnon@ridgerun.com)
|
||
|
|
* Licensed under the GPL
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <sched.h>
|
||
|
|
#include <signal.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <netinet/in.h>
|
||
|
|
#include <sys/time.h>
|
||
|
|
#include <sys/socket.h>
|
||
|
|
#include <sys/mman.h>
|
||
|
|
#include <sys/param.h>
|
||
|
|
#include "asm/types.h"
|
||
|
|
#include "user.h"
|
||
|
|
#include "ubd_user.h"
|
||
|
|
#include "os.h"
|
||
|
|
#include "cow.h"
|
||
|
|
|
||
|
|
#include <endian.h>
|
||
|
|
#include <byteswap.h>
|
||
|
|
|
||
|
|
void ignore_sigwinch_sig(void)
|
||
|
|
{
|
||
|
|
signal(SIGWINCH, SIG_IGN);
|
||
|
|
}
|
||
|
|
|
||
|
|
int start_io_thread(unsigned long sp, int *fd_out)
|
||
|
|
{
|
||
|
|
int pid, fds[2], err;
|
||
|
|
|
||
|
|
err = os_pipe(fds, 1, 1);
|
||
|
|
if(err < 0){
|
||
|
|
printk("start_io_thread - os_pipe failed, err = %d\n", -err);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
kernel_fd = fds[0];
|
||
|
|
*fd_out = fds[1];
|
||
|
|
|
||
|
|
err = os_set_fd_block(*fd_out, 0);
|
||
|
|
if (err) {
|
||
|
|
printk("start_io_thread - failed to set nonblocking I/O.\n");
|
||
|
|
goto out_close;
|
||
|
|
}
|
||
|
|
|
||
|
|
pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM, NULL);
|
||
|
|
if(pid < 0){
|
||
|
|
err = -errno;
|
||
|
|
printk("start_io_thread - clone failed : errno = %d\n", errno);
|
||
|
|
goto out_close;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(pid);
|
||
|
|
|
||
|
|
out_close:
|
||
|
|
os_close_file(fds[0]);
|
||
|
|
os_close_file(fds[1]);
|
||
|
|
kernel_fd = -1;
|
||
|
|
*fd_out = -1;
|
||
|
|
out:
|
||
|
|
return err;
|
||
|
|
}
|