#include <common.h>
-#if (CONFIG_COMMANDS & CFG_CMD_EXT2) || defined(CONFIG_CMD_EXT2)
-
#include <config.h>
#include <ext2fs.h>
static block_dev_desc_t *ext2fs_block_dev_desc;
static disk_partition_t part_info;
-int ext2fs_set_blk_dev (block_dev_desc_t * rbdd, int part)
+int ext2fs_set_blk_dev(block_dev_desc_t *rbdd, int part)
{
ext2fs_block_dev_desc = rbdd;
return 0;
}
}
- return (part_info.size);
+ return part_info.size;
}
-int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf) {
- char sec_buf[SECTOR_SIZE];
- unsigned block_len;
+int ext2fs_devread(int sector, int byte_offset, int byte_len, char *buf)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, SECTOR_SIZE);
+ unsigned sectors;
-/*
- * Check partition boundaries
- */
- if ((sector < 0)
- || ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >=
+ /*
+ * Check partition boundaries
+ */
+ if ((sector < 0) ||
+ ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >=
part_info.size)) {
- /* errnum = ERR_OUTSIDE_PART; */
- printf (" ** ext2fs_devread() read outside partition sector %d\n", sector);
- return (0);
+ /* errnum = ERR_OUTSIDE_PART; */
+ printf(" ** %s read outside partition sector %d\n",
+ __func__,
+ sector);
+ return 0;
}
-/*
- * Get the read to the beginning of a partition.
- */
+ /*
+ * 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);
+ debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len);
if (ext2fs_block_dev_desc == NULL) {
- printf ("** Invalid Block Device Descriptor (NULL)\n");
- return (0);
+ printf(" ** %s Invalid Block Device Descriptor (NULL)\n",
+ __func__);
+ return 0;
}
if (byte_offset != 0) {
/* read first part which isn't aligned with start of sector */
if (ext2fs_block_dev_desc->
- block_read (ext2fs_block_dev_desc->dev,
- part_info.start + sector, 1,
- (unsigned long *) sec_buf) != 1) {
- printf (" ** ext2fs_devread() read error **\n");
- return (0);
+ block_read(ext2fs_block_dev_desc->dev,
+ part_info.start + sector, 1,
+ (unsigned long *) sec_buf) != 1) {
+ printf(" ** %s read error **\n", __func__);
+ return 0;
}
- 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);
+ 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++;
}
/* read sector aligned part */
- block_len = byte_len & ~(SECTOR_SIZE - 1);
- if (ext2fs_block_dev_desc->block_read (ext2fs_block_dev_desc->dev,
- part_info.start + sector,
- block_len / SECTOR_SIZE,
- (unsigned long *) buf) !=
- block_len / SECTOR_SIZE) {
- printf (" ** ext2fs_devread() read error - block\n");
- return (0);
+ sectors = byte_len / SECTOR_SIZE;
+
+ if (sectors > 0) {
+ if (ext2fs_block_dev_desc->block_read(
+ ext2fs_block_dev_desc->dev,
+ part_info.start + sector,
+ sectors,
+ (unsigned long *) buf) != sectors) {
+ printf(" ** %s read error - block\n", __func__);
+ return 0;
+ }
+
+ buf += sectors * SECTOR_SIZE;
+ byte_len -= sectors * SECTOR_SIZE;
+ sector += sectors;
}
- 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 (ext2fs_block_dev_desc->
- block_read (ext2fs_block_dev_desc->dev,
- part_info.start + sector, 1,
- (unsigned long *) sec_buf) != 1) {
- printf (" ** ext2fs_devread() read error - last part\n");
- return (0);
+ block_read(ext2fs_block_dev_desc->dev,
+ part_info.start + sector, 1,
+ (unsigned long *) sec_buf) != 1) {
+ printf(" ** %s read error - last part\n", __func__);
+ return 0;
}
- memcpy (buf, sec_buf, byte_len);
+ memcpy(buf, sec_buf, byte_len);
}
- return (1);
+ return 1;
}
-#endif /* CFG_CMD_EXT2FS */