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u-boot/disk/part.c
Henrik Nordström f4d8de48f5 sandbox: block driver using host file/device as backing store 
Provide a way to use any host file or device as a block device in U-Boot.
This can be used to provide filesystem access within U-Boot to an ext2
image file on the host, for example.

The support is plumbed into the filesystem and partition interfaces.

We don't want to print a message in the driver every time we find a missing
device. Pass the information back to the caller where a message can be printed
if desired.

Signed-off-by: Henrik Nordström <henrik@henriknordstrom.net>
Signed-off-by: Simon Glass <sjg@chromium.org>
- Removed change to part.c get_device_and_partition()

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
2014-01-08 17:24:03 -07:00

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/*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <ide.h>
#include <malloc.h>
#include <part.h>
#undef PART_DEBUG
#ifdef PART_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
struct block_drvr {
char *name;
block_dev_desc_t* (*get_dev)(int dev);
};
static const struct block_drvr block_drvr[] = {
#if defined(CONFIG_CMD_IDE)
{ .name = "ide", .get_dev = ide_get_dev, },
#endif
#if defined(CONFIG_CMD_SATA)
{.name = "sata", .get_dev = sata_get_dev, },
#endif
#if defined(CONFIG_CMD_SCSI)
{ .name = "scsi", .get_dev = scsi_get_dev, },
#endif
#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
{ .name = "usb", .get_dev = usb_stor_get_dev, },
#endif
#if defined(CONFIG_MMC)
{ .name = "mmc", .get_dev = mmc_get_dev, },
#endif
#if defined(CONFIG_SYSTEMACE)
{ .name = "ace", .get_dev = systemace_get_dev, },
#endif
#if defined(CONFIG_SANDBOX)
{ .name = "host", .get_dev = host_get_dev, },
#endif
{ },
};
DECLARE_GLOBAL_DATA_PTR;
#ifdef HAVE_BLOCK_DEVICE
block_dev_desc_t *get_dev(const char *ifname, int dev)
{
const struct block_drvr *drvr = block_drvr;
block_dev_desc_t* (*reloc_get_dev)(int dev);
char *name;
if (!ifname)
return NULL;
name = drvr->name;
#ifdef CONFIG_NEEDS_MANUAL_RELOC
name += gd->reloc_off;
#endif
while (drvr->name) {
name = drvr->name;
reloc_get_dev = drvr->get_dev;
#ifdef CONFIG_NEEDS_MANUAL_RELOC
name += gd->reloc_off;
reloc_get_dev += gd->reloc_off;
#endif
if (strncmp(ifname, name, strlen(name)) == 0)
return reloc_get_dev(dev);
drvr++;
}
return NULL;
}
#else
block_dev_desc_t *get_dev(const char *ifname, int dev)
{
return NULL;
}
#endif
#ifdef HAVE_BLOCK_DEVICE
/* ------------------------------------------------------------------------- */
/*
* reports device info to the user
*/
#ifdef CONFIG_LBA48
typedef uint64_t lba512_t;
#else
typedef lbaint_t lba512_t;
#endif
/*
* Overflowless variant of (block_count * mul_by / div_by)
* when div_by > mul_by
*/
static lba512_t lba512_muldiv (lba512_t block_count, lba512_t mul_by, lba512_t div_by)
{
lba512_t bc_quot, bc_rem;
/* x * m / d == x / d * m + (x % d) * m / d */
bc_quot = block_count / div_by;
bc_rem = block_count - div_by * bc_quot;
return bc_quot * mul_by + (bc_rem * mul_by) / div_by;
}
void dev_print (block_dev_desc_t *dev_desc)
{
lba512_t lba512; /* number of blocks if 512bytes block size */
if (dev_desc->type == DEV_TYPE_UNKNOWN) {
puts ("not available\n");
return;
}
switch (dev_desc->if_type) {
case IF_TYPE_SCSI:
printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n",
dev_desc->target,dev_desc->lun,
dev_desc->vendor,
dev_desc->product,
dev_desc->revision);
break;
case IF_TYPE_ATAPI:
case IF_TYPE_IDE:
case IF_TYPE_SATA:
printf ("Model: %s Firm: %s Ser#: %s\n",
dev_desc->vendor,
dev_desc->revision,
dev_desc->product);
break;
case IF_TYPE_SD:
case IF_TYPE_MMC:
case IF_TYPE_USB:
printf ("Vendor: %s Rev: %s Prod: %s\n",
dev_desc->vendor,
dev_desc->revision,
dev_desc->product);
break;
case IF_TYPE_DOC:
puts("device type DOC\n");
return;
case IF_TYPE_UNKNOWN:
puts("device type unknown\n");
return;
default:
printf("Unhandled device type: %i\n", dev_desc->if_type);
return;
}
puts (" Type: ");
if (dev_desc->removable)
puts ("Removable ");
switch (dev_desc->type & 0x1F) {
case DEV_TYPE_HARDDISK:
puts ("Hard Disk");
break;
case DEV_TYPE_CDROM:
puts ("CD ROM");
break;
case DEV_TYPE_OPDISK:
puts ("Optical Device");
break;
case DEV_TYPE_TAPE:
puts ("Tape");
break;
default:
printf ("# %02X #", dev_desc->type & 0x1F);
break;
}
puts ("\n");
if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
lbaint_t lba;
lba = dev_desc->lba;
lba512 = (lba * (dev_desc->blksz/512));
/* round to 1 digit */
mb = lba512_muldiv(lba512, 10, 2048); /* 2048 = (1024 * 1024) / 512 MB */
mb_quot = mb / 10;
mb_rem = mb - (10 * mb_quot);
gb = mb / 1024;
gb_quot = gb / 10;
gb_rem = gb - (10 * gb_quot);
#ifdef CONFIG_LBA48
if (dev_desc->lba48)
printf (" Supports 48-bit addressing\n");
#endif
#if defined(CONFIG_SYS_64BIT_LBA)
printf (" Capacity: %ld.%ld MB = %ld.%ld GB (%Ld x %ld)\n",
mb_quot, mb_rem,
gb_quot, gb_rem,
lba,
dev_desc->blksz);
#else
printf (" Capacity: %ld.%ld MB = %ld.%ld GB (%ld x %ld)\n",
mb_quot, mb_rem,
gb_quot, gb_rem,
(ulong)lba,
dev_desc->blksz);
#endif
} else {
puts (" Capacity: not available\n");
}
}
#endif
#ifdef HAVE_BLOCK_DEVICE
void init_part (block_dev_desc_t * dev_desc)
{
#ifdef CONFIG_ISO_PARTITION
if (test_part_iso(dev_desc) == 0) {
dev_desc->part_type = PART_TYPE_ISO;
return;
}
#endif
#ifdef CONFIG_MAC_PARTITION
if (test_part_mac(dev_desc) == 0) {
dev_desc->part_type = PART_TYPE_MAC;
return;
}
#endif
/* must be placed before DOS partition detection */
#ifdef CONFIG_EFI_PARTITION
if (test_part_efi(dev_desc) == 0) {
dev_desc->part_type = PART_TYPE_EFI;
return;
}
#endif
#ifdef CONFIG_DOS_PARTITION
if (test_part_dos(dev_desc) == 0) {
dev_desc->part_type = PART_TYPE_DOS;
return;
}
#endif
#ifdef CONFIG_AMIGA_PARTITION
if (test_part_amiga(dev_desc) == 0) {
dev_desc->part_type = PART_TYPE_AMIGA;
return;
}
#endif
dev_desc->part_type = PART_TYPE_UNKNOWN;
}
#if defined(CONFIG_MAC_PARTITION) || \
defined(CONFIG_DOS_PARTITION) || \
defined(CONFIG_ISO_PARTITION) || \
defined(CONFIG_AMIGA_PARTITION) || \
defined(CONFIG_EFI_PARTITION)
static void print_part_header (const char *type, block_dev_desc_t * dev_desc)
{
puts ("\nPartition Map for ");
switch (dev_desc->if_type) {
case IF_TYPE_IDE:
puts ("IDE");
break;
case IF_TYPE_SATA:
puts ("SATA");
break;
case IF_TYPE_SCSI:
puts ("SCSI");
break;
case IF_TYPE_ATAPI:
puts ("ATAPI");
break;
case IF_TYPE_USB:
puts ("USB");
break;
case IF_TYPE_DOC:
puts ("DOC");
break;
case IF_TYPE_MMC:
puts ("MMC");
break;
case IF_TYPE_HOST:
puts("HOST");
break;
default:
puts ("UNKNOWN");
break;
}
printf (" device %d -- Partition Type: %s\n\n",
dev_desc->dev, type);
}
#endif /* any CONFIG_..._PARTITION */
void print_part (block_dev_desc_t * dev_desc)
{
switch (dev_desc->part_type) {
#ifdef CONFIG_MAC_PARTITION
case PART_TYPE_MAC:
PRINTF ("## Testing for valid MAC partition ##\n");
print_part_header ("MAC", dev_desc);
print_part_mac (dev_desc);
return;
#endif
#ifdef CONFIG_DOS_PARTITION
case PART_TYPE_DOS:
PRINTF ("## Testing for valid DOS partition ##\n");
print_part_header ("DOS", dev_desc);
print_part_dos (dev_desc);
return;
#endif
#ifdef CONFIG_ISO_PARTITION
case PART_TYPE_ISO:
PRINTF ("## Testing for valid ISO Boot partition ##\n");
print_part_header ("ISO", dev_desc);
print_part_iso (dev_desc);
return;
#endif
#ifdef CONFIG_AMIGA_PARTITION
case PART_TYPE_AMIGA:
PRINTF ("## Testing for a valid Amiga partition ##\n");
print_part_header ("AMIGA", dev_desc);
print_part_amiga (dev_desc);
return;
#endif
#ifdef CONFIG_EFI_PARTITION
case PART_TYPE_EFI:
PRINTF ("## Testing for valid EFI partition ##\n");
print_part_header ("EFI", dev_desc);
print_part_efi (dev_desc);
return;
#endif
}
puts ("## Unknown partition table\n");
}
#endif /* HAVE_BLOCK_DEVICE */
int get_partition_info(block_dev_desc_t *dev_desc, int part
, disk_partition_t *info)
{
#ifdef HAVE_BLOCK_DEVICE
#ifdef CONFIG_PARTITION_UUIDS
/* The common case is no UUID support */
info->uuid[0] = 0;
#endif
switch (dev_desc->part_type) {
#ifdef CONFIG_MAC_PARTITION
case PART_TYPE_MAC:
if (get_partition_info_mac(dev_desc, part, info) == 0) {
PRINTF("## Valid MAC partition found ##\n");
return 0;
}
break;
#endif
#ifdef CONFIG_DOS_PARTITION
case PART_TYPE_DOS:
if (get_partition_info_dos(dev_desc, part, info) == 0) {
PRINTF("## Valid DOS partition found ##\n");
return 0;
}
break;
#endif
#ifdef CONFIG_ISO_PARTITION
case PART_TYPE_ISO:
if (get_partition_info_iso(dev_desc, part, info) == 0) {
PRINTF("## Valid ISO boot partition found ##\n");
return 0;
}
break;
#endif
#ifdef CONFIG_AMIGA_PARTITION
case PART_TYPE_AMIGA:
if (get_partition_info_amiga(dev_desc, part, info) == 0) {
PRINTF("## Valid Amiga partition found ##\n");
return 0;
}
break;
#endif
#ifdef CONFIG_EFI_PARTITION
case PART_TYPE_EFI:
if (get_partition_info_efi(dev_desc, part, info) == 0) {
PRINTF("## Valid EFI partition found ##\n");
return 0;
}
break;
#endif
default:
break;
}
#endif /* HAVE_BLOCK_DEVICE */
return -1;
}
int get_device(const char *ifname, const char *dev_str,
block_dev_desc_t **dev_desc)
{
char *ep;
int dev;
dev = simple_strtoul(dev_str, &ep, 16);
if (*ep) {
printf("** Bad device specification %s %s **\n",
ifname, dev_str);
return -1;
}
*dev_desc = get_dev(ifname, dev);
if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
printf("** Bad device %s %s **\n", ifname, dev_str);
return -1;
}
return dev;
}
#define PART_UNSPECIFIED -2
#define PART_AUTO -1
#define MAX_SEARCH_PARTITIONS 16
int get_device_and_partition(const char *ifname, const char *dev_part_str,
block_dev_desc_t **dev_desc,
disk_partition_t *info, int allow_whole_dev)
{
int ret = -1;
const char *part_str;
char *dup_str = NULL;
const char *dev_str;
int dev;
char *ep;
int p;
int part;
disk_partition_t tmpinfo;
/*
* For now, we have a special case for sandbox, since there is no
* real block device support.
*/
if (0 == strcmp(ifname, "host")) {
*dev_desc = NULL;
info->start = info->size = info->blksz = 0;
info->bootable = 0;
strcpy((char *)info->type, BOOT_PART_TYPE);
strcpy((char *)info->name, "Sandbox host");
#ifdef CONFIG_PARTITION_UUIDS
info->uuid[0] = 0;
#endif
return 0;
}
/* If no dev_part_str, use bootdevice environment variable */
if (!dev_part_str || !strlen(dev_part_str) ||
!strcmp(dev_part_str, "-"))
dev_part_str = getenv("bootdevice");
/* If still no dev_part_str, it's an error */
if (!dev_part_str) {
printf("** No device specified **\n");
goto cleanup;
}
/* Separate device and partition ID specification */
part_str = strchr(dev_part_str, ':');
if (part_str) {
dup_str = strdup(dev_part_str);
dup_str[part_str - dev_part_str] = 0;
dev_str = dup_str;
part_str++;
} else {
dev_str = dev_part_str;
}
/* Look up the device */
dev = get_device(ifname, dev_str, dev_desc);
if (dev < 0)
goto cleanup;
/* Convert partition ID string to number */
if (!part_str || !*part_str) {
part = PART_UNSPECIFIED;
} else if (!strcmp(part_str, "auto")) {
part = PART_AUTO;
} else {
/* Something specified -> use exactly that */
part = (int)simple_strtoul(part_str, &ep, 16);
/*
* Less than whole string converted,
* or request for whole device, but caller requires partition.
*/
if (*ep || (part == 0 && !allow_whole_dev)) {
printf("** Bad partition specification %s %s **\n",
ifname, dev_part_str);
goto cleanup;
}
}
/*
* No partition table on device,
* or user requested partition 0 (entire device).
*/
if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
(part == 0)) {
if (!(*dev_desc)->lba) {
printf("** Bad device size - %s %s **\n", ifname,
dev_str);
goto cleanup;
}
/*
* If user specified a partition ID other than 0,
* or the calling command only accepts partitions,
* it's an error.
*/
if ((part > 0) || (!allow_whole_dev)) {
printf("** No partition table - %s %s **\n", ifname,
dev_str);
goto cleanup;
}
(*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
info->start = 0;
info->size = (*dev_desc)->lba;
info->blksz = (*dev_desc)->blksz;
info->bootable = 0;
strcpy((char *)info->type, BOOT_PART_TYPE);
strcpy((char *)info->name, "Whole Disk");
#ifdef CONFIG_PARTITION_UUIDS
info->uuid[0] = 0;
#endif
ret = 0;
goto cleanup;
}
/*
* Now there's known to be a partition table,
* not specifying a partition means to pick partition 1.
*/
if (part == PART_UNSPECIFIED)
part = 1;
/*
* If user didn't specify a partition number, or did specify something
* other than "auto", use that partition number directly.
*/
if (part != PART_AUTO) {
ret = get_partition_info(*dev_desc, part, info);
if (ret) {
printf("** Invalid partition %d **\n", part);
goto cleanup;
}
} else {
/*
* Find the first bootable partition.
* If none are bootable, fall back to the first valid partition.
*/
part = 0;
for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
ret = get_partition_info(*dev_desc, p, info);
if (ret)
continue;
/*
* First valid partition, or new better partition?
* If so, save partition ID.
*/
if (!part || info->bootable)
part = p;
/* Best possible partition? Stop searching. */
if (info->bootable)
break;
/*
* We now need to search further for best possible.
* If we what we just queried was the best so far,
* save the info since we over-write it next loop.
*/
if (part == p)
tmpinfo = *info;
}
/* If we found any acceptable partition */
if (part) {
/*
* If we searched all possible partition IDs,
* return the first valid partition we found.
*/
if (p == MAX_SEARCH_PARTITIONS + 1)
*info = tmpinfo;
} else {
printf("** No valid partitions found **\n");
ret = -1;
goto cleanup;
}
}
if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
printf("** Invalid partition type \"%.32s\""
" (expect \"" BOOT_PART_TYPE "\")\n",
info->type);
ret = -1;
goto cleanup;
}
(*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
ret = part;
goto cleanup;
cleanup:
free(dup_str);
return ret;
}
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