/* | |
* 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; | |
} |