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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/bootvfs.h>
#include <sys/filep.h>
#include <libintl.h>
#include <locale.h>
#include "message.h"
/*
* This file is glue layer to pcfs module in usr/src/common/fs/pcfs.c.
* It's main functionality is to get the stage file blocklist. It's
* used for installing grub on a Solaris boot partition.
*/
extern struct boot_fs_ops bpcfs_ops;
struct boot_fs_ops *bfs_ops;
struct boot_fs_ops *bfs_tab[] = {&bpcfs_ops, NULL};
static int dev_fd;
int bootrd_debug = 0;
#define DEV_BSIZE 512
#define MAX_CHUNK 64
static unsigned int *blocklist;
/* diskread_callback is set in filesytem module (pcfs.c) */
int (*diskread_callback)(int, int);
int (*fileread_callback)(int, int);
static int
add_stage2_block(int blocknum, int nblk)
{
static int i = -2;
if (i >= 0 && (blocklist[i] + blocklist[i + 1] == blocknum)) {
blocklist[i + 1] += nblk;
return (0);
}
i += 2;
if (i >= DEV_BSIZE / 8) {
fprintf(stderr, PCFS_FRAGMENTED);
exit(-1);
}
blocklist[i] = blocknum;
blocklist[i + 1] = nblk;
return (0);
}
/*
* This one reads the ramdisk. If fi_memp is set, we copy the
* ramdisk content to the designated buffer. Otherwise, we
* do a "cached" read (set fi_memp to the actual ramdisk buffer).
*/
int
diskread(fileid_t *filep)
{
int ret;
uint_t blocknum, diskloc;
blocknum = filep->fi_blocknum;
if (diskread_callback) {
diskread_callback(blocknum, filep->fi_count / DEV_BSIZE);
return (0);
}
diskloc = blocknum * DEV_BSIZE;
if (filep->fi_memp == NULL) {
filep->fi_memp = malloc(filep->fi_count);
}
if (filep->fi_memp == NULL) {
fprintf(stderr, OUT_OF_MEMORY);
return (-1);
}
ret = pread(dev_fd, filep->fi_memp, filep->fi_count, diskloc);
if (ret < 0)
perror("diskread: pread");
return (ret >= 0 ? 0 : -1);
}
void *
bkmem_alloc(size_t s)
{
return (malloc(s));
}
/*ARGSUSED*/
void
bkmem_free(void *p, size_t s)
{
free(p);
}
static int
mountroot(char *name)
{
int i;
/* try ops in bfs_tab and return the first successful one */
for (i = 0; bfs_tab[i] != NULL; i++) {
bfs_ops = bfs_tab[i];
if (BRD_MOUNTROOT(bfs_ops, name) == 0)
return (0);
}
return (-1);
}
static int
unmountroot()
{
return (BRD_UNMOUNTROOT(bfs_ops));
}
static int
pcfs_glue_open(const char *filename, int flags)
{
return (BRD_OPEN(bfs_ops, (char *)filename, flags));
}
static int
pcfs_glue_close(int fd)
{
return (BRD_CLOSE(bfs_ops, fd));
}
static ssize_t
pcfs_glue_read(int fd, void *buf, size_t size)
{
return (BRD_READ(bfs_ops, fd, buf, size));
}
/*
* Get the blocklist for stage2
*/
int
read_stage2_blocklist(int device_fd, unsigned int *blkbuf)
{
int i, fd, stage2_block;
char buf[DEV_BSIZE];
ssize_t size;
dev_fd = device_fd;
if (mountroot("dummy") != 0) {
fprintf(stderr, MOUNT_FAIL_PCFS);
return (-1);
}
if ((fd = pcfs_glue_open("/boot/grub/stage2", 0)) == -1) {
fprintf(stderr, OPEN_FAIL_PCFS);
return (-1);
}
if (bootrd_debug)
(void) printf("start reading stage2:\n");
stage2_block = 0;
blocklist = blkbuf;
fileread_callback = add_stage2_block;
for (;;) {
size = pcfs_glue_read(fd, buf, DEV_BSIZE);
if (size != DEV_BSIZE)
break;
stage2_block++;
}
fileread_callback = NULL;
(void) pcfs_glue_close(fd);
if (bootrd_debug) {
(void) printf("last block size = %d\n", size);
for (i = 0; blocklist[i] != 0; i += 2) {
(void) printf("sectors: %d-%d\n",
blocklist[i],
blocklist[i] + blocklist[i + 1] - 1);
}
(void) printf("total blocks in stage 2: %d\n", stage2_block);
}
(void) unmountroot();
return (0);
}
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