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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifdef FSYS_ZFS
#include <fsimage_grub.h>
#include <fsimage_priv.h>
#include <stdio.h>
#include <inttypes.h>
#include "mb_info.h"
#undef filemax
#undef filepos
#undef errnum
#define MAXNAMELEN 256
#define MAXPATHLEN 1024
/**** START FROM disk_io.c ****/
char current_rootpool[MAXNAMELEN];
char current_bootfs[MAXNAMELEN];
uint64_t current_bootfs_obj;
char current_bootpath[MAXPATHLEN];
char current_devid[MAXPATHLEN];
int is_zfs_mount;
unsigned long best_drive;
unsigned long best_part;
int find_best_root;
unsigned long part_length;
/**** END FROM disk_io.c ****/
uint64_t filemax;
uint64_t filepos;
struct multiboot_info mbi;
fsi_file_t *zfs_ffi;
int errnum;
char *bootstring = NULL;
extern int zfs_mount(void);
extern int zfs_open(char *filename);
extern int zfs_read(char *buf, int len);
#define ZFS_SCRATCH_SIZE 0x400000
#define FSI_MOS_SHIFT 10
#define FSI_MOS_MASK ((1 << FSI_MOS_SHIFT) - 1)
unsigned char fsi_mos_buf[ZFS_SCRATCH_SIZE + FSI_MOS_MASK + 1];
#define FSI_MOS_ALIGN(addr) (((uintptr_t)addr + FSI_MOS_MASK) & \
~FSI_MOS_MASK)
#define FSI_MOS(buf) ((FSI_MOS_ALIGN(buf) + \
ZFS_SCRATCH_SIZE - 0x100000) >> FSI_MOS_SHIFT)
static int
fsi_zfs_mount(fsi_file_t *ffi, const char *options)
{
zfs_ffi = ffi;
mbi.mem_upper = FSI_MOS(fsi_mos_buf);
/* If an boot filesystem is passed in, set it to current_bootfs */
if (options != NULL) {
if (strlen(options) < MAXNAMELEN) {
strcpy(current_bootfs, options);
}
}
return (zfs_mount());
}
static int
fsi_zfs_open(fsi_file_t *ffi, char *filename)
{
char *fsi_bootstring;
uint64_t *fmax;
uint64_t *fpos;
int rc;
zfs_ffi = ffi;
fmax = fsig_filemax(ffi);
fpos = fsig_filepos(ffi);
rc = zfs_open(filename);
if (rc != 1) {
return (rc);
}
*fmax = filemax;
*fpos = filepos;
if (bootstring == NULL) {
rc = asprintf(&bootstring,
"zfs-bootfs=%s/%"PRIu64",bootpath='%s'",
current_rootpool, current_bootfs_obj,
current_bootpath);
if (rc == -1) {
return (rc);
}
fsi_bootstring = fsi_bootstring_alloc(ffi->ff_fsi,
strlen(bootstring) + 1);
strcpy(fsi_bootstring, bootstring);
}
return (rc);
}
static int
fsi_zfs_read(fsi_file_t *ffi, char *buf, int len)
{
uint64_t *fpos;
int rc;
zfs_ffi = ffi;
fpos = fsig_filepos(ffi);
filepos = *fpos;
rc = zfs_read(buf, len);
*fpos = filepos;
return (rc);
}
fsi_plugin_ops_t *
fsi_init_plugin(int version, fsi_plugin_t *fp, const char **name)
{
static fsig_plugin_ops_t ops = {
FSIMAGE_PLUGIN_VERSION,
.fpo_mount = fsi_zfs_mount,
.fpo_dir = fsi_zfs_open,
.fpo_read = fsi_zfs_read,
};
*name = "zfs";
return (fsig_init(fp, &ops));
}
#endif /* FSYS_ZFS */
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