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libext2fs: change EXT2_MAX_BLOCKS_PER_GROUP() to be cluster size aware 

Change the EXT2_MAX_BLOCKS_PER_GROUP so that it takes the cluster size
into account.  This way we can open bigalloc file systems without
ext2fs_open() thinking that they are corrupt.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
bitmap-optimize
Theodore Ts'o 2011-06-04 16:40:26 -04:00
parent 6220b6715f
commit ae9e37cd11
1 changed files with 5 additions and 1 deletions
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6
lib/ext2fs/ext2_fs.h
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@ -225,9 +225,13 @@ struct ext2_dx_countlimit {
#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
#define EXT2_CLUSTERS_PER_GROUP(s) (EXT2_SB(s)->s_clusters_per_group)
#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s))
/* limits imposed by 16-bit value gd_free_{blocks,inode}_count */
#define EXT2_MAX_BLOCKS_PER_GROUP(s) ((1 << 16) - 8)
#define EXT2_MAX_BLOCKS_PER_GROUP(s) (((1 << 16) - 8) * \
(EXT2_CLUSTER_SIZE(s) / \
EXT2_BLOCK_SIZE(s)))
#define EXT2_MAX_CLUSTERS_PER_GROUP(s) ((1 << 16) - 8)
#define EXT2_MAX_INODES_PER_GROUP(s) ((1 << 16) - EXT2_INODES_PER_BLOCK(s))
#ifdef __KERNEL__
#define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)