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fs/ext4: Support device block sizes != 512 bytes

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The 512 byte block size was hard coded in the ext4 file systems.
Large harddisks today support bigger block sizes typically 4096
bytes.
This patch removes this limitation.

Signed-off-by: Egbert Eich <eich@suse.com>
This commit is contained in:
Egbert Eich 2013-05-01 01:13:19 +00:00 • committed by Tom Rini
parent b1e6c4c3d4
commit 50ce4c07df
8 changed files with 95 additions and 76 deletions
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12
include/ext_common.h
View file

@ -34,7 +34,6 @@
#define __EXT_COMMON__
#include <command.h>
#define SECTOR_SIZE 0x200
#define SECTOR_BITS 9
/* Magic value used to identify an ext2 filesystem. */
#define EXT2_MAGIC 0xEF53
@ -58,18 +57,13 @@
#define FILETYPE_INO_SYMLINK 0120000
#define EXT2_ROOT_INO 2 /* Root inode */
/* Bits used as offset in sector */
#define DISK_SECTOR_BITS 9
/* The size of an ext2 block in bytes. */
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
/* Log2 size of ext2 block in 512 blocks. */
#define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu \
(data->sblock.log2_block_size) + 1)
/* Log2 size of ext2 block in bytes. */
#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
(data->sblock.log2_block_size) + 10)
#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
(data->sblock.log2_block_size) \
+ EXT2_MIN_BLOCK_LOG_SIZE)
#define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \
(data->sblock.inode_size))