mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-27 05:23:34 +00:00
4101f68792
Use 'struct' instead of a typdef. Also since 'struct block_dev_desc' is long and causes 80-column violations, rename it to struct blk_desc. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Stephen Warren <swarren@nvidia.com>
111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/*
|
|
*
|
|
* based on code of fs/reiserfs/dev.c by
|
|
*
|
|
* (C) Copyright 2003 - 2004
|
|
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <zfs_common.h>
|
|
|
|
static struct blk_desc *zfs_blk_desc;
|
|
static disk_partition_t *part_info;
|
|
|
|
void zfs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
|
|
{
|
|
zfs_blk_desc = rbdd;
|
|
part_info = info;
|
|
}
|
|
|
|
/* err */
|
|
int zfs_devread(int sector, int byte_offset, int byte_len, char *buf)
|
|
{
|
|
short sec_buffer[SECTOR_SIZE/sizeof(short)];
|
|
char *sec_buf = (char *)sec_buffer;
|
|
unsigned block_len;
|
|
|
|
/*
|
|
* Check partition boundaries
|
|
*/
|
|
if ((sector < 0) ||
|
|
((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >=
|
|
part_info->size)) {
|
|
/* errnum = ERR_OUTSIDE_PART; */
|
|
printf(" ** zfs_devread() read outside partition sector %d\n", sector);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Get the read to the beginning of a partition.
|
|
*/
|
|
sector += byte_offset >> SECTOR_BITS;
|
|
byte_offset &= SECTOR_SIZE - 1;
|
|
|
|
debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len);
|
|
|
|
if (zfs_blk_desc == NULL) {
|
|
printf("** Invalid Block Device Descriptor (NULL)\n");
|
|
return 1;
|
|
}
|
|
|
|
if (byte_offset != 0) {
|
|
/* read first part which isn't aligned with start of sector */
|
|
if (zfs_blk_desc->block_read(zfs_blk_desc,
|
|
part_info->start + sector, 1,
|
|
(void *)sec_buf) != 1) {
|
|
printf(" ** zfs_devread() read error **\n");
|
|
return 1;
|
|
}
|
|
memcpy(buf, sec_buf + byte_offset,
|
|
min(SECTOR_SIZE - byte_offset, byte_len));
|
|
buf += min(SECTOR_SIZE - byte_offset, byte_len);
|
|
byte_len -= min(SECTOR_SIZE - byte_offset, byte_len);
|
|
sector++;
|
|
}
|
|
|
|
if (byte_len == 0)
|
|
return 0;
|
|
|
|
/* read sector aligned part */
|
|
block_len = byte_len & ~(SECTOR_SIZE - 1);
|
|
|
|
if (block_len == 0) {
|
|
u8 p[SECTOR_SIZE];
|
|
|
|
block_len = SECTOR_SIZE;
|
|
zfs_blk_desc->block_read(zfs_blk_desc,
|
|
part_info->start + sector,
|
|
1, (void *)p);
|
|
memcpy(buf, p, byte_len);
|
|
return 0;
|
|
}
|
|
|
|
if (zfs_blk_desc->block_read(zfs_blk_desc, part_info->start + sector,
|
|
block_len / SECTOR_SIZE,
|
|
(void *)buf) != block_len / SECTOR_SIZE) {
|
|
printf(" ** zfs_devread() read error - block\n");
|
|
return 1;
|
|
}
|
|
|
|
block_len = byte_len & ~(SECTOR_SIZE - 1);
|
|
buf += block_len;
|
|
byte_len -= block_len;
|
|
sector += block_len / SECTOR_SIZE;
|
|
|
|
if (byte_len != 0) {
|
|
/* read rest of data which are not in whole sector */
|
|
if (zfs_blk_desc->block_read(zfs_blk_desc,
|
|
part_info->start + sector,
|
|
1, (void *)sec_buf) != 1) {
|
|
printf(" ** zfs_devread() read error - last part\n");
|
|
return 1;
|
|
}
|
|
memcpy(buf, sec_buf, byte_len);
|
|
}
|
|
return 0;
|
|
}
|