return desc + offset;
}
-static inline int
-block_in_use(unsigned long block, struct super_block *sb, unsigned char *map)
-{
- return ext2_test_bit ((block -
- le32_to_cpu(EXT2_SB(sb)->s_es->s_first_data_block)) %
- EXT2_BLOCKS_PER_GROUP(sb), map);
-}
-
/*
* Read the bitmap for a given block_group, reading into the specified
* slot in the superblock's bitmap cache.
static struct buffer_head *
read_block_bitmap(struct super_block *sb, unsigned int block_group)
{
- int i;
struct ext2_group_desc * desc;
struct buffer_head * bh = NULL;
- unsigned int bitmap_blk;
-
+
desc = ext2_get_group_desc (sb, block_group, NULL);
if (!desc)
- return NULL;
- bitmap_blk = le32_to_cpu(desc->bg_block_bitmap);
- bh = sb_bread(sb, bitmap_blk);
+ goto error_out;
+ bh = sb_bread(sb, le32_to_cpu(desc->bg_block_bitmap));
if (!bh)
- ext2_error (sb, __FUNCTION__,
+ ext2_error (sb, "read_block_bitmap",
"Cannot read block bitmap - "
"block_group = %d, block_bitmap = %u",
block_group, le32_to_cpu(desc->bg_block_bitmap));
-
- /* check whether block bitmap block number is set */
- if (!block_in_use(bitmap_blk, sb, bh->b_data)) {
- /* bad block bitmap */
- goto error_out;
- }
- /* check whether the inode bitmap block number is set */
- bitmap_blk = le32_to_cpu(desc->bg_inode_bitmap);
- if (!block_in_use(bitmap_blk, sb, bh->b_data)) {
- /* bad block bitmap */
- goto error_out;
- }
- /* check whether the inode table block number is set */
- bitmap_blk = le32_to_cpu(desc->bg_inode_table);
- for (i = 0; i < EXT2_SB(sb)->s_itb_per_group; i++, bitmap_blk++) {
- if (!block_in_use(bitmap_blk, sb, bh->b_data)) {
- /* bad block bitmap */
- goto error_out;
- }
- }
-
- return bh;
-
error_out:
- brelse(bh);
- ext2_error(sb, __FUNCTION__,
- "Invalid block bitmap - "
- "block_group = %d, block = %u",
- block_group, bitmap_blk);
- return NULL;
+ return bh;
}
static void release_blocks(struct super_block *sb, int count)
in_range (block, le32_to_cpu(desc->bg_inode_table),
sbi->s_itb_per_group) ||
in_range (block + count - 1, le32_to_cpu(desc->bg_inode_table),
- sbi->s_itb_per_group))
+ sbi->s_itb_per_group)) {
ext2_error (sb, "ext2_free_blocks",
"Freeing blocks in system zones - "
"Block = %lu, count = %lu",
block, count);
+ goto error_return;
+ }
for (i = 0, group_freed = 0; i < count; i++) {
if (!ext2_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
in_range(ret_block, le32_to_cpu(gdp->bg_inode_table),
EXT2_SB(sb)->s_itb_per_group) ||
in_range(ret_block + num - 1, le32_to_cpu(gdp->bg_inode_table),
- EXT2_SB(sb)->s_itb_per_group))
+ EXT2_SB(sb)->s_itb_per_group)) {
ext2_error(sb, "ext2_new_blocks",
"Allocating block in system zone - "
"blocks from "E2FSBLK", length %lu",
ret_block, num);
+ goto out;
+ }
performed_allocation = 1;
#endif
}
-
static inline int test_root(int a, int b)
{
int num = b;