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/*
* Mach Operating System
* Copyright (c) 1992-1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <mach.h>
#include <file_io.h>
extern void *kalloc();
/*
* Create a paging partition given a file name
*/
extern void create_paging_partition();
kern_return_t
add_paging_file(master_device_port, file_name)
mach_port_t master_device_port;
char *file_name;
{
register struct file_direct *fdp;
register kern_return_t result;
struct file pfile;
boolean_t isa_file;
bzero((char *) &pfile, sizeof(struct file));
result = open_file(master_device_port, file_name, &pfile);
if (result != KERN_SUCCESS)
return result;
fdp = (struct file_direct *) kalloc(sizeof *fdp);
bzero((char *) fdp, sizeof *fdp);
isa_file = file_is_structured(&pfile);
result = open_file_direct(pfile.f_dev, fdp, isa_file);
if (result)
panic("Can't open paging file %s\n", file_name);
result = add_file_direct(fdp, &pfile);
if (result)
panic("Can't read disk addresses: %d\n", result);
close_file(&pfile);
/*
* Set up the default paging partition
*/
create_paging_partition(file_name, fdp, isa_file);
return result;
}
/*
* Destroy a paging_partition given a file name
*/
kern_return_t
remove_paging_file(file_name)
char *file_name;
{
struct file_direct *fdp = 0;
kern_return_t kr;
kr = destroy_paging_partition(file_name, &fdp);
if (kr == KERN_SUCCESS) {
remove_file_direct(fdp);
kfree(fdp, sizeof(*fdp));
}
return kr;
}
/*
* Set up default pager
*/
extern char *strbuild();
boolean_t
default_pager_setup(master_device_port, server_dir_name)
mach_port_t master_device_port;
char *server_dir_name;
{
register kern_return_t result;
char paging_file_name[MAXPATHLEN+1];
(void) strbuild(paging_file_name,
server_dir_name,
"/paging_file",
(char *)0);
while (TRUE) {
result = add_paging_file(master_device_port, paging_file_name);
if (result == KERN_SUCCESS)
break;
printf("Can't open paging file %s: %d\n",
paging_file_name,
result);
bzero(paging_file_name, sizeof(paging_file_name));
printf("Paging file name ? ");
safe_gets(paging_file_name, sizeof(paging_file_name));
if (paging_file_name[0] == 0) {
printf("*** WARNING: running without paging area!\n");
return FALSE;
}
}
/*
* Our caller will become the default pager - later
*/
return TRUE;
}
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