From 56fdaadc124a8ef9ec0fd8ff578233ec3b1137be Mon Sep 17 00:00:00 2001
From: "Weirich, Bernhard" <Bernhard.Weirich@riedel.net>
Date: Wed, 10 Jun 2009 14:00:37 +0200
Subject: [PATCH] ext2: fix inode size and calculations
Signed-off-by: unsik Kim <donari75@gmail.com>
Signed-off-by: Bernhard Weirich <bernhard.weirich@riedel.net>
Signed-off-by: Wolfgang Denk <wd@denx.de>
Tested-by: Wolfgang Denk <wd@denx.de>
---
fs/ext2/ext2fs.c | 53 +++++++++++++++++++++++++++++-------------------
1 file changed, 32 insertions(+), 21 deletions(-)
diff --git a/fs/ext2/ext2fs.c b/fs/ext2/ext2fs.c
index 436f4a4aa9..d54f60b30b 100644
--- a/fs/ext2/ext2fs.c
+++ b/fs/ext2/ext2fs.c
@@ -110,7 +110,7 @@ struct ext2_block_group {
uint32_t inode_table_id;
uint16_t free_blocks;
uint16_t free_inodes;
- uint16_t pad;
+ uint16_t used_dir_cnt;
uint32_t reserved[3];
};
@@ -182,14 +182,22 @@ int indir2_blkno = -1;
static int ext2fs_blockgroup
(struct ext2_data *data, int group, struct ext2_block_group *blkgrp) {
+ unsigned int blkno;
+ unsigned int blkoff;
+ unsigned int desc_per_blk;
+
+ desc_per_blk = EXT2_BLOCK_SIZE(data) / sizeof(struct ext2_block_group);
+
+ blkno = __le32_to_cpu(data->sblock.first_data_block) + 1 +
+ group / desc_per_blk;
+ blkoff = (group % desc_per_blk) * sizeof(struct ext2_block_group);
#ifdef DEBUG
- printf ("ext2fs read blockgroup\n");
+ printf ("ext2fs read %d group descriptor (blkno %d blkoff %d)\n",
+ group, blkno, blkoff);
#endif
- return (ext2fs_devread
- (((__le32_to_cpu (data->sblock.first_data_block) +
- 1) << LOG2_EXT2_BLOCK_SIZE (data)),
- group * sizeof (struct ext2_block_group),
- sizeof (struct ext2_block_group), (char *) blkgrp));
+ return (ext2fs_devread (blkno << LOG2_EXT2_BLOCK_SIZE(data),
+ blkoff, sizeof(struct ext2_block_group), (char *)blkgrp));
+
}
@@ -203,34 +211,37 @@ static int ext2fs_read_inode
unsigned int blkno;
unsigned int blkoff;
- /* It is easier to calculate if the first inode is 0. */
- ino--;
#ifdef DEBUG
printf ("ext2fs read inode %d\n", ino);
#endif
- status = ext2fs_blockgroup (data,
- ino /
- __le32_to_cpu (sblock->inodes_per_group),
- &blkgrp);
+ /* It is easier to calculate if the first inode is 0. */
+ ino--;
+ status = ext2fs_blockgroup (data, ino / __le32_to_cpu
+ (sblock->inodes_per_group), &blkgrp);
if (status == 0) {
return (0);
}
- inodes_per_block = EXT2_BLOCK_SIZE (data) / 128;
- blkno = (ino % __le32_to_cpu (sblock->inodes_per_group)) /
- inodes_per_block;
- blkoff = (ino % __le32_to_cpu (sblock->inodes_per_group)) %
- inodes_per_block;
+
+ inodes_per_block = EXT2_BLOCK_SIZE(data) / __le16_to_cpu(sblock->inode_size);
+
+#ifdef DEBUG
+ printf ("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff);
+#endif
+
+ blkno = __le32_to_cpu (blkgrp.inode_table_id) +
+ (ino % __le32_to_cpu (sblock->inodes_per_group))
+ / inodes_per_block;
+ blkoff = (ino % inodes_per_block) * __le16_to_cpu (sblock->inode_size);
#ifdef DEBUG
printf ("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff);
#endif
/* Read the inode. */
- status = ext2fs_devread (((__le32_to_cpu (blkgrp.inode_table_id) +
- blkno) << LOG2_EXT2_BLOCK_SIZE (data)),
- sizeof (struct ext2_inode) * blkoff,
+ status = ext2fs_devread (blkno << LOG2_EXT2_BLOCK_SIZE (data), blkoff,
sizeof (struct ext2_inode), (char *) inode);
if (status == 0) {
return (0);
}
+
return (1);
}
--
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