*/
#include <common.h>
-
-#if (CONFIG_COMMANDS & CFG_CMD_EXT2)
#include <ext2fs.h>
#include <malloc.h>
#include <asm/byteorder.h>
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];
};
uint32_t *indir2_block = NULL;
int indir2_size = 0;
int indir2_blkno = -1;
+static unsigned int inode_size;
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));
+
}
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);
+ printf ("ext2fs read inode %d, inode_size %d\n", ino, inode_size);
#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) / inode_size;
+
+ blkno = __le32_to_cpu (blkgrp.inode_table_id) +
+ (ino % __le32_to_cpu (sblock->inodes_per_group))
+ / inodes_per_block;
+ blkoff = (ino % inodes_per_block) * 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);
}
int blockcnt;
int log2blocksize = LOG2_EXT2_BLOCK_SIZE (node->data);
int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS);
- unsigned int filesize = node->inode.size;
+ unsigned int filesize = __le32_to_cpu(node->inode.size);
/* Adjust len so it we can't read past the end of the file. */
if (len > filesize) {
return (-1);
}
} else {
- memset (buf, blocksize - skipfirst, 0);
+ memset (buf, 0, blocksize - skipfirst);
}
buf += blocksize - skipfirst;
}
symlinknest = 0;
- if (!path || path[0] != '/') {
+ if (!path) {
return (0);
}
int len;
if (ext2fs_root == NULL) {
- return (0);
+ return (-1);
}
ext2fs_file = NULL;
status = ext2fs_find_file (filename, &ext2fs_root->diropen, &fdiro,
ext2fs_file = fdiro;
return (len);
- fail:
+fail:
ext2fs_free_node (fdiro, &ext2fs_root->diropen);
- return (0);
+ return (-1);
}
if (__le16_to_cpu (data->sblock.magic) != EXT2_MAGIC) {
goto fail;
}
+ if (__le32_to_cpu(data->sblock.revision_level == 0)) {
+ inode_size = 128;
+ } else {
+ inode_size = __le16_to_cpu(data->sblock.inode_size);
+ }
+#ifdef DEBUG
+ printf("EXT2 rev %d, inode_size %d\n",
+ __le32_to_cpu(data->sblock.revision_level), inode_size);
+#endif
data->diropen.data = data;
data->diropen.ino = 2;
data->diropen.inode_read = 1;
ext2fs_root = NULL;
return (0);
}
-
-#endif /* CFG_CMD_EXT2FS */