mirror of https://github.com/ventoy/Ventoy
266 lines
7.5 KiB
C
266 lines
7.5 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef GRUB_DISK_HEADER
|
|
#define GRUB_DISK_HEADER 1
|
|
|
|
#include <config.h>
|
|
|
|
#include <grub/symbol.h>
|
|
#include <grub/err.h>
|
|
#include <grub/types.h>
|
|
#include <grub/device.h>
|
|
/* For NULL. */
|
|
#include <grub/mm.h>
|
|
|
|
/* These are used to set a device id. When you add a new disk device,
|
|
you must define a new id for it here. */
|
|
enum grub_disk_dev_id
|
|
{
|
|
GRUB_DISK_DEVICE_BIOSDISK_ID,
|
|
GRUB_DISK_DEVICE_OFDISK_ID,
|
|
GRUB_DISK_DEVICE_LOOPBACK_ID,
|
|
GRUB_DISK_DEVICE_EFIDISK_ID,
|
|
GRUB_DISK_DEVICE_DISKFILTER_ID,
|
|
GRUB_DISK_DEVICE_HOST_ID,
|
|
GRUB_DISK_DEVICE_ATA_ID,
|
|
GRUB_DISK_DEVICE_MEMDISK_ID,
|
|
GRUB_DISK_DEVICE_NAND_ID,
|
|
GRUB_DISK_DEVICE_SCSI_ID,
|
|
GRUB_DISK_DEVICE_CRYPTODISK_ID,
|
|
GRUB_DISK_DEVICE_ARCDISK_ID,
|
|
GRUB_DISK_DEVICE_HOSTDISK_ID,
|
|
GRUB_DISK_DEVICE_PROCFS_ID,
|
|
GRUB_DISK_DEVICE_CBFSDISK_ID,
|
|
GRUB_DISK_DEVICE_UBOOTDISK_ID,
|
|
GRUB_DISK_DEVICE_XEN,
|
|
GRUB_DISK_DEVICE_OBDISK_ID,
|
|
};
|
|
|
|
struct grub_disk;
|
|
#ifdef GRUB_UTIL
|
|
struct grub_disk_memberlist;
|
|
#endif
|
|
|
|
typedef enum
|
|
{
|
|
GRUB_DISK_PULL_NONE,
|
|
GRUB_DISK_PULL_REMOVABLE,
|
|
GRUB_DISK_PULL_RESCAN,
|
|
GRUB_DISK_PULL_MAX
|
|
} grub_disk_pull_t;
|
|
|
|
typedef int (*grub_disk_dev_iterate_hook_t) (const char *name, void *data);
|
|
|
|
/* Disk device. */
|
|
struct grub_disk_dev
|
|
{
|
|
/* The device name. */
|
|
const char *name;
|
|
|
|
/* The device id used by the cache manager. */
|
|
enum grub_disk_dev_id id;
|
|
|
|
/* Call HOOK with each device name, until HOOK returns non-zero. */
|
|
int (*disk_iterate) (grub_disk_dev_iterate_hook_t hook, void *hook_data,
|
|
grub_disk_pull_t pull);
|
|
|
|
/* Open the device named NAME, and set up DISK. */
|
|
grub_err_t (*disk_open) (const char *name, struct grub_disk *disk);
|
|
|
|
/* Close the disk DISK. */
|
|
void (*disk_close) (struct grub_disk *disk);
|
|
|
|
/* Read SIZE sectors from the sector SECTOR of the disk DISK into BUF. */
|
|
grub_err_t (*disk_read) (struct grub_disk *disk, grub_disk_addr_t sector,
|
|
grub_size_t size, char *buf);
|
|
|
|
/* Write SIZE sectors from BUF into the sector SECTOR of the disk DISK. */
|
|
grub_err_t (*disk_write) (struct grub_disk *disk, grub_disk_addr_t sector,
|
|
grub_size_t size, const char *buf);
|
|
|
|
#ifdef GRUB_UTIL
|
|
struct grub_disk_memberlist *(*disk_memberlist) (struct grub_disk *disk);
|
|
const char * (*disk_raidname) (struct grub_disk *disk);
|
|
#endif
|
|
|
|
/* The next disk device. */
|
|
struct grub_disk_dev *next;
|
|
};
|
|
typedef struct grub_disk_dev *grub_disk_dev_t;
|
|
|
|
extern grub_disk_dev_t EXPORT_VAR (grub_disk_dev_list);
|
|
|
|
struct grub_partition;
|
|
|
|
typedef void (*grub_disk_read_hook_t) (grub_disk_addr_t sector,
|
|
unsigned offset, unsigned length,
|
|
void *data);
|
|
|
|
/* Disk. */
|
|
struct grub_disk
|
|
{
|
|
/* The disk name. */
|
|
const char *name;
|
|
|
|
/* The underlying disk device. */
|
|
grub_disk_dev_t dev;
|
|
|
|
/* The total number of sectors. */
|
|
grub_uint64_t total_sectors;
|
|
|
|
/* Logarithm of sector size. */
|
|
unsigned int log_sector_size;
|
|
|
|
/* Maximum number of sectors read divided by GRUB_DISK_CACHE_SIZE. */
|
|
unsigned int max_agglomerate;
|
|
|
|
/* The id used by the disk cache manager. */
|
|
unsigned long id;
|
|
|
|
/* The partition information. This is machine-specific. */
|
|
struct grub_partition *partition;
|
|
|
|
/* Called when a sector was read. OFFSET is between 0 and
|
|
the sector size minus 1, and LENGTH is between 0 and the sector size. */
|
|
grub_disk_read_hook_t read_hook;
|
|
|
|
/* Caller-specific data passed to the read hook. */
|
|
void *read_hook_data;
|
|
|
|
/* Device-specific data. */
|
|
void *data;
|
|
};
|
|
typedef struct grub_disk *grub_disk_t;
|
|
|
|
#ifdef GRUB_UTIL
|
|
struct grub_disk_memberlist
|
|
{
|
|
grub_disk_t disk;
|
|
struct grub_disk_memberlist *next;
|
|
};
|
|
typedef struct grub_disk_memberlist *grub_disk_memberlist_t;
|
|
#endif
|
|
|
|
/* The sector size. */
|
|
#define GRUB_DISK_SECTOR_SIZE 0x200
|
|
#define GRUB_DISK_SECTOR_BITS 9
|
|
|
|
/* The maximum number of disk caches. */
|
|
#define GRUB_DISK_CACHE_NUM 1021
|
|
|
|
/* The size of a disk cache in 512B units. Must be at least as big as the
|
|
largest supported sector size, currently 16K. */
|
|
#define GRUB_DISK_CACHE_BITS 6
|
|
#define GRUB_DISK_CACHE_SIZE (1 << GRUB_DISK_CACHE_BITS)
|
|
|
|
#define GRUB_DISK_MAX_MAX_AGGLOMERATE ((1 << (30 - GRUB_DISK_CACHE_BITS - GRUB_DISK_SECTOR_BITS)) - 1)
|
|
|
|
/* Return value of grub_disk_get_size() in case disk size is unknown. */
|
|
#define GRUB_DISK_SIZE_UNKNOWN 0xffffffffffffffffULL
|
|
|
|
/* This is called from the memory manager. */
|
|
void grub_disk_cache_invalidate_all (void);
|
|
|
|
void EXPORT_FUNC(grub_disk_dev_register) (grub_disk_dev_t dev);
|
|
void EXPORT_FUNC(grub_disk_dev_unregister) (grub_disk_dev_t dev);
|
|
static inline int
|
|
grub_disk_dev_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data)
|
|
{
|
|
grub_disk_dev_t p;
|
|
grub_disk_pull_t pull;
|
|
|
|
for (pull = 0; pull < GRUB_DISK_PULL_MAX; pull++)
|
|
for (p = grub_disk_dev_list; p; p = p->next)
|
|
if (p->disk_iterate && (p->disk_iterate) (hook, hook_data, pull))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
grub_disk_t EXPORT_FUNC(grub_disk_open) (const char *name);
|
|
void EXPORT_FUNC(grub_disk_close) (grub_disk_t disk);
|
|
grub_err_t EXPORT_FUNC(grub_disk_blocklist_read)(void *chunklist, grub_uint64_t sector,
|
|
grub_uint64_t size, grub_uint32_t log_sector_size);
|
|
|
|
grub_err_t EXPORT_FUNC(grub_disk_read) (grub_disk_t disk,
|
|
grub_disk_addr_t sector,
|
|
grub_off_t offset,
|
|
grub_size_t size,
|
|
void *buf);
|
|
grub_err_t grub_disk_write (grub_disk_t disk,
|
|
grub_disk_addr_t sector,
|
|
grub_off_t offset,
|
|
grub_size_t size,
|
|
const void *buf);
|
|
extern grub_err_t (*EXPORT_VAR(grub_disk_write_weak)) (grub_disk_t disk,
|
|
grub_disk_addr_t sector,
|
|
grub_off_t offset,
|
|
grub_size_t size,
|
|
const void *buf);
|
|
|
|
|
|
grub_uint64_t EXPORT_FUNC(grub_disk_get_size) (grub_disk_t disk);
|
|
|
|
#if DISK_CACHE_STATS
|
|
void
|
|
EXPORT_FUNC(grub_disk_cache_get_performance) (unsigned long *hits, unsigned long *misses);
|
|
#endif
|
|
|
|
extern void (* EXPORT_VAR(grub_disk_firmware_fini)) (void);
|
|
extern int EXPORT_VAR(grub_disk_firmware_is_tainted);
|
|
|
|
static inline void
|
|
grub_stop_disk_firmware (void)
|
|
{
|
|
/* To prevent two drivers operating on the same disks. */
|
|
grub_disk_firmware_is_tainted = 1;
|
|
if (grub_disk_firmware_fini)
|
|
{
|
|
grub_disk_firmware_fini ();
|
|
grub_disk_firmware_fini = NULL;
|
|
}
|
|
}
|
|
|
|
/* Disk cache. */
|
|
struct grub_disk_cache
|
|
{
|
|
enum grub_disk_dev_id dev_id;
|
|
unsigned long disk_id;
|
|
grub_disk_addr_t sector;
|
|
char *data;
|
|
int lock;
|
|
};
|
|
|
|
extern struct grub_disk_cache EXPORT_VAR(grub_disk_cache_table)[GRUB_DISK_CACHE_NUM];
|
|
|
|
#if defined (GRUB_UTIL)
|
|
void grub_lvm_init (void);
|
|
void grub_ldm_init (void);
|
|
void grub_mdraid09_init (void);
|
|
void grub_mdraid1x_init (void);
|
|
void grub_diskfilter_init (void);
|
|
void grub_lvm_fini (void);
|
|
void grub_ldm_fini (void);
|
|
void grub_mdraid09_fini (void);
|
|
void grub_mdraid1x_fini (void);
|
|
void grub_diskfilter_fini (void);
|
|
#endif
|
|
|
|
#endif /* ! GRUB_DISK_HEADER */
|