9b67a3c4cd
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from initrd_user.c file under os-Linux dir and join initrd_user.c and initrd_kern.c files in new file initrd.c Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include "linux/init.h"
|
|
#include "linux/bootmem.h"
|
|
#include "linux/initrd.h"
|
|
#include "asm/types.h"
|
|
#include "user_util.h"
|
|
#include "kern_util.h"
|
|
#include "initrd.h"
|
|
#include "init.h"
|
|
#include "os.h"
|
|
|
|
/* Changed by uml_initrd_setup, which is a setup */
|
|
static char *initrd __initdata = NULL;
|
|
|
|
static int __init read_initrd(void)
|
|
{
|
|
void *area;
|
|
long long size;
|
|
int err;
|
|
|
|
if(initrd == NULL) return 0;
|
|
err = os_file_size(initrd, &size);
|
|
if(err) return 0;
|
|
area = alloc_bootmem(size);
|
|
if(area == NULL) return 0;
|
|
if(load_initrd(initrd, area, size) == -1) return 0;
|
|
initrd_start = (unsigned long) area;
|
|
initrd_end = initrd_start + size;
|
|
return 0;
|
|
}
|
|
|
|
__uml_postsetup(read_initrd);
|
|
|
|
static int __init uml_initrd_setup(char *line, int *add)
|
|
{
|
|
initrd = line;
|
|
return 0;
|
|
}
|
|
|
|
__uml_setup("initrd=", uml_initrd_setup,
|
|
"initrd=<initrd image>\n"
|
|
" This is used to boot UML from an initrd image. The argument is the\n"
|
|
" name of the file containing the image.\n\n"
|
|
);
|
|
|
|
int load_initrd(char *filename, void *buf, int size)
|
|
{
|
|
int fd, n;
|
|
|
|
fd = os_open_file(filename, of_read(OPENFLAGS()), 0);
|
|
if(fd < 0){
|
|
printk("Opening '%s' failed - err = %d\n", filename, -fd);
|
|
return(-1);
|
|
}
|
|
n = os_read_file(fd, buf, size);
|
|
if(n != size){
|
|
printk("Read of %d bytes from '%s' failed, err = %d\n", size,
|
|
filename, -n);
|
|
return(-1);
|
|
}
|
|
|
|
os_close_file(fd);
|
|
return(0);
|
|
}
|
|
/*
|
|
* 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:
|
|
*/
|