91acb21f08
The patch to use host AIO support that I submitted early after 2.6.13 exposed some problems in the block driver. I have fixes for these, but am not comfortable putting them into 2.6.14 at this late date. So, this patch reverts the use of host AIO. I will resubmit the original patch, plus fixes to the driver after 2.6.14 in order to get a reasonable amount of testing before they're exposed to the general public. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
76 lines
1.5 KiB
C
76 lines
1.5 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_util.h"
|
|
#include "kern_util.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];
|
|
|
|
pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM | SIGCHLD,
|
|
NULL);
|
|
if(pid < 0){
|
|
printk("start_io_thread - clone failed : errno = %d\n", errno);
|
|
err = -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);
|
|
}
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|