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Move grub_disk_write out of kernel into disk.mod.

This commit is contained in:
Vladimir Serbinenko 2013-10-27 15:44:55 +01:00
parent 04dea7e6c2
commit 442b86de32
8 changed files with 259 additions and 189 deletions
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4
ChangeLog
View File

@ -1,3 +1,7 @@
2013-10-27 Vladimir Serbinenko <phcoder@gmail.com>
Move grub_disk_write out of kernel into disk.mod.
2013-10-27 Vladimir Serbinenko <phcoder@gmail.com> 2013-10-27 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/kern/misc.c (grub_vsnprintf_real): Unify int and wchar * grub-core/kern/misc.c (grub_vsnprintf_real): Unify int and wchar

1
Makefile.util.def
View File

@ -9,6 +9,7 @@ library = {
common = grub-core/kern/command.c; common = grub-core/kern/command.c;
common = grub-core/kern/device.c; common = grub-core/kern/device.c;
common = grub-core/kern/disk.c; common = grub-core/kern/disk.c;
common = grub-core/lib/disk.c;
common = util/getroot.c; common = util/getroot.c;
common = grub-core/osdep/unix/getroot.c; common = grub-core/osdep/unix/getroot.c;
common = grub-core/osdep/getroot.c; common = grub-core/osdep/getroot.c;

5
grub-core/Makefile.core.def
View File

@ -455,6 +455,11 @@ image = {
enable = mips_loongson; enable = mips_loongson;
}; };
module = {
name = disk;
common = lib/disk.c;
};
module = { module = {
name = trig; name = trig;
common_nodist = trigtables.c; common_nodist = trigtables.c;

14
grub-core/disk/cryptodisk.c
View File

@ -631,10 +631,16 @@ grub_cryptodisk_write (grub_disk_t disk, grub_disk_addr_t sector,
return grub_crypto_gcry_error (gcry_err); return grub_crypto_gcry_error (gcry_err);
} }
err = grub_disk_write (dev->source_disk, /* Since ->write was called so disk.mod is loaded but be paranoid */
(sector << (disk->log_sector_size
- GRUB_DISK_SECTOR_BITS)) + dev->offset, if (grub_disk_write_weak)
0, size << disk->log_sector_size, tmp); err = grub_disk_write_weak (dev->source_disk,
(sector << (disk->log_sector_size
- GRUB_DISK_SECTOR_BITS))
+ dev->offset,
0, size << disk->log_sector_size, tmp);
else
err = grub_error (GRUB_ERR_BUG, "disk.mod not loaded");
grub_free (tmp); grub_free (tmp);
return err; return err;
} }

187
grub-core/kern/disk.c
View File

@ -31,18 +31,7 @@
/* The last time the disk was used. */ /* The last time the disk was used. */
static grub_uint64_t grub_last_time = 0; static grub_uint64_t grub_last_time = 0;
struct grub_disk_cache grub_disk_cache_table[GRUB_DISK_CACHE_NUM];
/* 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;
};
static struct grub_disk_cache grub_disk_cache_table[GRUB_DISK_CACHE_NUM];
void (*grub_disk_firmware_fini) (void); void (*grub_disk_firmware_fini) (void);
int grub_disk_firmware_is_tainted; int grub_disk_firmware_is_tainted;
@ -59,35 +48,12 @@ grub_disk_cache_get_performance (unsigned long *hits, unsigned long *misses)
} }
#endif #endif
static unsigned grub_err_t (*grub_disk_write_weak) (grub_disk_t disk,
grub_disk_cache_get_index (unsigned long dev_id, unsigned long disk_id, grub_disk_addr_t sector,
grub_disk_addr_t sector) grub_off_t offset,
{ grub_size_t size,
return ((dev_id * 524287UL + disk_id * 2606459UL const void *buf);
+ ((unsigned) (sector >> GRUB_DISK_CACHE_BITS))) #include "disk_common.c"
% GRUB_DISK_CACHE_NUM);
}
static void
grub_disk_cache_invalidate (unsigned long dev_id, unsigned long disk_id,
grub_disk_addr_t sector)
{
unsigned cache_index;
struct grub_disk_cache *cache;
sector &= ~(GRUB_DISK_CACHE_SIZE - 1);
cache_index = grub_disk_cache_get_index (dev_id, disk_id, sector);
cache = grub_disk_cache_table + cache_index;
if (cache->dev_id == dev_id && cache->disk_id == disk_id
&& cache->sector == sector && cache->data)
{
cache->lock = 1;
grub_free (cache->data);
cache->data = 0;
cache->lock = 0;
}
}
void void
grub_disk_cache_invalidate_all (void) grub_disk_cache_invalidate_all (void)
@ -341,53 +307,6 @@ grub_disk_close (grub_disk_t disk)
grub_free (disk); grub_free (disk);
} }
/* This function performs three tasks:
- Make sectors disk relative from partition relative.
- Normalize offset to be less than the sector size.
- Verify that the range is inside the partition. */
static grub_err_t
grub_disk_adjust_range (grub_disk_t disk, grub_disk_addr_t *sector,
grub_off_t *offset, grub_size_t size)
{
grub_partition_t part;
*sector += *offset >> GRUB_DISK_SECTOR_BITS;
*offset &= GRUB_DISK_SECTOR_SIZE - 1;
for (part = disk->partition; part; part = part->parent)
{
grub_disk_addr_t start;
grub_uint64_t len;
start = part->start;
len = part->len;
if (*sector >= len
|| len - *sector < ((*offset + size + GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS))
return grub_error (GRUB_ERR_OUT_OF_RANGE,
N_("attempt to read or write outside of partition"));
*sector += start;
}
if (disk->total_sectors != GRUB_DISK_SIZE_UNKNOWN
&& ((disk->total_sectors << (disk->log_sector_size - GRUB_DISK_SECTOR_BITS)) <= *sector
|| ((*offset + size + GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS) > (disk->total_sectors
<< (disk->log_sector_size
- GRUB_DISK_SECTOR_BITS)) - *sector))
return grub_error (GRUB_ERR_OUT_OF_RANGE,
N_("attempt to read or write outside of disk `%s'"), disk->name);
return GRUB_ERR_NONE;
}
static inline grub_disk_addr_t
transform_sector (grub_disk_t disk, grub_disk_addr_t sector)
{
return sector >> (disk->log_sector_size - GRUB_DISK_SECTOR_BITS);
}
/* Small read (less than cache size and not pass across cache unit boundaries). /* Small read (less than cache size and not pass across cache unit boundaries).
sector is already adjusted and is divisible by cache unit size. sector is already adjusted and is divisible by cache unit size.
*/ */
@ -613,98 +532,6 @@ grub_disk_read (grub_disk_t disk, grub_disk_addr_t sector,
return grub_errno; return grub_errno;
} }
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)
{
unsigned real_offset;
grub_disk_addr_t aligned_sector;
grub_dprintf ("disk", "Writing `%s'...\n", disk->name);
if (grub_disk_adjust_range (disk, &sector, &offset, size) != GRUB_ERR_NONE)
return -1;
aligned_sector = (sector & ~((1 << (disk->log_sector_size
- GRUB_DISK_SECTOR_BITS)) - 1));
real_offset = offset + ((sector - aligned_sector) << GRUB_DISK_SECTOR_BITS);
sector = aligned_sector;
while (size)
{
if (real_offset != 0 || (size < (1U << disk->log_sector_size)
&& size != 0))
{
char *tmp_buf;
grub_size_t len;
grub_partition_t part;
tmp_buf = grub_malloc (1 << disk->log_sector_size);
if (!tmp_buf)
return grub_errno;
part = disk->partition;
disk->partition = 0;
if (grub_disk_read (disk, sector,
0, (1 << disk->log_sector_size), tmp_buf)
!= GRUB_ERR_NONE)
{
disk->partition = part;
grub_free (tmp_buf);
goto finish;
}
disk->partition = part;
len = (1 << disk->log_sector_size) - real_offset;
if (len > size)
len = size;
grub_memcpy (tmp_buf + real_offset, buf, len);
grub_disk_cache_invalidate (disk->dev->id, disk->id, sector);
if ((disk->dev->write) (disk, transform_sector (disk, sector),
1, tmp_buf) != GRUB_ERR_NONE)
{
grub_free (tmp_buf);
goto finish;
}
grub_free (tmp_buf);
sector += (1 << (disk->log_sector_size - GRUB_DISK_SECTOR_BITS));
buf = (const char *) buf + len;
size -= len;
real_offset = 0;
}
else
{
grub_size_t len;
grub_size_t n;
len = size & ~((1 << disk->log_sector_size) - 1);
n = size >> disk->log_sector_size;
if ((disk->dev->write) (disk, transform_sector (disk, sector),
n, buf) != GRUB_ERR_NONE)
goto finish;
while (n--)
{
grub_disk_cache_invalidate (disk->dev->id, disk->id, sector);
sector += (1 << (disk->log_sector_size - GRUB_DISK_SECTOR_BITS));
}
buf = (const char *) buf + len;
size -= len;
}
}
finish:
return grub_errno;
}
grub_uint64_t grub_uint64_t
grub_disk_get_size (grub_disk_t disk) grub_disk_get_size (grub_disk_t disk)
{ {

55
grub-core/kern/disk_common.c Normal file
View File

@ -0,0 +1,55 @@
/* This function performs three tasks:
- Make sectors disk relative from partition relative.
- Normalize offset to be less than the sector size.
- Verify that the range is inside the partition. */
static grub_err_t
grub_disk_adjust_range (grub_disk_t disk, grub_disk_addr_t *sector,
grub_off_t *offset, grub_size_t size)
{
grub_partition_t part;
*sector += *offset >> GRUB_DISK_SECTOR_BITS;
*offset &= GRUB_DISK_SECTOR_SIZE - 1;
for (part = disk->partition; part; part = part->parent)
{
grub_disk_addr_t start;
grub_uint64_t len;
start = part->start;
len = part->len;
if (*sector >= len
|| len - *sector < ((*offset + size + GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS))
return grub_error (GRUB_ERR_OUT_OF_RANGE,
N_("attempt to read or write outside of partition"));
*sector += start;
}
if (disk->total_sectors != GRUB_DISK_SIZE_UNKNOWN
&& ((disk->total_sectors << (disk->log_sector_size - GRUB_DISK_SECTOR_BITS)) <= *sector
|| ((*offset + size + GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS) > (disk->total_sectors
<< (disk->log_sector_size
- GRUB_DISK_SECTOR_BITS)) - *sector))
return grub_error (GRUB_ERR_OUT_OF_RANGE,
N_("attempt to read or write outside of disk `%s'"), disk->name);
return GRUB_ERR_NONE;
}
static inline grub_disk_addr_t
transform_sector (grub_disk_t disk, grub_disk_addr_t sector)
{
return sector >> (disk->log_sector_size - GRUB_DISK_SECTOR_BITS);
}
static unsigned
grub_disk_cache_get_index (unsigned long dev_id, unsigned long disk_id,
grub_disk_addr_t sector)
{
return ((dev_id * 524287UL + disk_id * 2606459UL
+ ((unsigned) (sector >> GRUB_DISK_CACHE_BITS)))
% GRUB_DISK_CACHE_NUM);
}

154
grub-core/lib/disk.c Normal file
View File

@ -0,0 +1,154 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2004,2006,2007,2008,2009,2010 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/>.
*/
#include <grub/disk.h>
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/types.h>
#include <grub/partition.h>
#include <grub/misc.h>
#include <grub/time.h>
#include <grub/file.h>
#include <grub/i18n.h>
GRUB_MOD_LICENSE ("GPLv3+");
#include "../kern/disk_common.c"
static void
grub_disk_cache_invalidate (unsigned long dev_id, unsigned long disk_id,
grub_disk_addr_t sector)
{
unsigned cache_index;
struct grub_disk_cache *cache;
sector &= ~(GRUB_DISK_CACHE_SIZE - 1);
cache_index = grub_disk_cache_get_index (dev_id, disk_id, sector);
cache = grub_disk_cache_table + cache_index;
if (cache->dev_id == dev_id && cache->disk_id == disk_id
&& cache->sector == sector && cache->data)
{
cache->lock = 1;
grub_free (cache->data);
cache->data = 0;
cache->lock = 0;
}
}
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)
{
unsigned real_offset;
grub_disk_addr_t aligned_sector;
grub_dprintf ("disk", "Writing `%s'...\n", disk->name);
if (grub_disk_adjust_range (disk, &sector, &offset, size) != GRUB_ERR_NONE)
return -1;
aligned_sector = (sector & ~((1 << (disk->log_sector_size
- GRUB_DISK_SECTOR_BITS)) - 1));
real_offset = offset + ((sector - aligned_sector) << GRUB_DISK_SECTOR_BITS);
sector = aligned_sector;
while (size)
{
if (real_offset != 0 || (size < (1U << disk->log_sector_size)
&& size != 0))
{
char *tmp_buf;
grub_size_t len;
grub_partition_t part;
tmp_buf = grub_malloc (1 << disk->log_sector_size);
if (!tmp_buf)
return grub_errno;
part = disk->partition;
disk->partition = 0;
if (grub_disk_read (disk, sector,
0, (1 << disk->log_sector_size), tmp_buf)
!= GRUB_ERR_NONE)
{
disk->partition = part;
grub_free (tmp_buf);
goto finish;
}
disk->partition = part;
len = (1 << disk->log_sector_size) - real_offset;
if (len > size)
len = size;
grub_memcpy (tmp_buf + real_offset, buf, len);
grub_disk_cache_invalidate (disk->dev->id, disk->id, sector);
if ((disk->dev->write) (disk, transform_sector (disk, sector),
1, tmp_buf) != GRUB_ERR_NONE)
{
grub_free (tmp_buf);
goto finish;
}
grub_free (tmp_buf);
sector += (1 << (disk->log_sector_size - GRUB_DISK_SECTOR_BITS));
buf = (const char *) buf + len;
size -= len;
real_offset = 0;
}
else
{
grub_size_t len;
grub_size_t n;
len = size & ~((1 << disk->log_sector_size) - 1);
n = size >> disk->log_sector_size;
if ((disk->dev->write) (disk, transform_sector (disk, sector),
n, buf) != GRUB_ERR_NONE)
goto finish;
while (n--)
{
grub_disk_cache_invalidate (disk->dev->id, disk->id, sector);
sector += (1 << (disk->log_sector_size - GRUB_DISK_SECTOR_BITS));
}
buf = (const char *) buf + len;
size -= len;
}
}
finish:
return grub_errno;
}
GRUB_MOD_INIT(disk)
{
grub_disk_write_weak = grub_disk_write;
}
GRUB_MOD_FINI(disk)
{
grub_disk_write_weak = NULL;
}

28
include/grub/disk.h
View File

@ -193,11 +193,17 @@ grub_err_t EXPORT_FUNC(grub_disk_read) (grub_disk_t disk,
grub_off_t offset, grub_off_t offset,
grub_size_t size, grub_size_t size,
void *buf); void *buf);
grub_err_t EXPORT_FUNC(grub_disk_write) (grub_disk_t disk, grub_err_t grub_disk_write (grub_disk_t disk,
grub_disk_addr_t sector, grub_disk_addr_t sector,
grub_off_t offset, grub_off_t offset,
grub_size_t size, grub_size_t size,
const void *buf); 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); grub_uint64_t EXPORT_FUNC(grub_disk_get_size) (grub_disk_t disk);
@ -221,6 +227,18 @@ grub_stop_disk_firmware (void)
} }
} }
/* 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) #if defined (GRUB_UTIL)
void grub_lvm_init (void); void grub_lvm_init (void);
void grub_ldm_init (void); void grub_ldm_init (void);