From: Egbert Eich
The 512 byte block size was hard coded in the ext4 file systems. Large
harddisks today support bigger block sizes typically 4096 bytes.
Signed-off-by: Egbert Eich
---
fs/ext4/dev.c | 60 +++
fs/ext4/ext4_common.c | 42 ++---
fs/ext4/ext4_common.h |2 +-
fs/ext4/ext4_journal.c |6 +---
fs/ext4/ext4_write.c | 32 +
fs/ext4/ext4fs.c | 14 ++
include/ext4fs.h |1 +
include/ext_common.h | 12 ++---
8 files changed, 94 insertions(+), 75 deletions(-)
diff --git a/fs/ext4/dev.c b/fs/ext4/dev.c
index 464a67d..7b6fd16 100644
--- a/fs/ext4/dev.c
+++ b/fs/ext4/dev.c
@@ -40,6 +40,7 @@
#include
#include
#include
+#include "ext4_common.h"
unsigned long part_offset;
@@ -48,37 +49,41 @@ static disk_partition_t *part_info;
void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
{
+ assert(rbdd->blksz == (1 << rbdd->log2blksz));
ext4fs_block_dev_desc = rbdd;
part_info = info;
part_offset = info->start;
- get_fs()->total_sect = (info->size * info->blksz) / SECTOR_SIZE;
+ get_fs()->total_sect = (info->size * info->blksz) >>
+ get_fs()->dev_desc->log2blksz;
get_fs()->dev_desc = rbdd;
}
int ext4fs_devread(int sector, int byte_offset, int byte_len, char *buf)
{
- ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, SECTOR_SIZE);
unsigned block_len;
+ int log2blksz = ext4fs_block_dev_desc->log2blksz;
+ ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, (ext4fs_block_dev_desc ?
+ext4fs_block_dev_desc->blksz :
+0));
+ if (ext4fs_block_dev_desc == NULL) {
+ printf("** Invalid Block Device Descriptor (NULL)\n");
+ return 0;
+ }
/* Check partition boundaries */
if ((sector < 0)
- || ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >=
- part_info->size)) {
+ || ((sector + ((byte_offset + byte_len - 1) >> log2blksz))
+ >= part_info->size)) {
printf("%s read outside partition %d\n", __func__, sector);
return 0;
}
/* Get the read to the beginning of a partition */
- sector += byte_offset >> SECTOR_BITS;
- byte_offset &= SECTOR_SIZE - 1;
+ sector += byte_offset >> log2blksz;
+ byte_offset &= ext4fs_block_dev_desc->blksz - 1;
debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len);
- if (ext4fs_block_dev_desc == NULL) {
- printf("** Invalid Block Device Descriptor (NULL)\n");
- return 0;
- }
-
if (byte_offset != 0) {
/* read first part which isn't aligned with start of sector */
if (ext4fs_block_dev_desc->
@@ -89,9 +94,12 @@ int ext4fs_devread(int sector, int byte_offset, int
byte_len, char *buf)
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);
+ min(ext4fs_block_dev_desc->blksz
+ - byte_offset, byte_len));
+ buf += min(ext4fs_block_dev_desc->blksz
+ - byte_offset, byte_len);
+ byte_len -= min(ext4fs_block_dev_desc->blksz
+ - byte_offset, byte_len);
sector++;
}
@@ -99,12 +107,12 @@ int ext4fs_devread(int sector, int byte_offset, int
byte_len, char *buf)
return 1;
/* read sector aligned part */
- block_len = byte_len & ~(SECTOR_SIZE - 1);
+ block_len = byte_len & ~(ext4fs_block_dev_desc->blksz - 1);
if (block_len == 0) {
- ALLOC_CACHE_ALIGN_BUFFER(u8, p, SECTOR_SIZE);
+ ALLOC_CACHE_ALIGN_BUFFER(u8, p, ext4fs_block_dev_desc->blksz);
- block_len = SECTOR_SIZE;
+ block_len = ext4fs_block_dev_desc->blksz;
ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
part_info->start + sector,
1, (unsigned long *)p);
@@ -114,16 +122,16 @@ int ext4fs_devread(int sector, int byte_offset, int
byte_len, char *buf)
if (ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
part_info->start + sector,
- block_len / SECTOR_SIZE,
+ block_len >> log2blksz,
(unsigned long *) buf) !=
-
