From fd2d42912f9f09e5250cb3b024ee0625704e9cb7 Mon Sep 17 00:00:00 2001 From: Avantika Mathur Date: Mon, 28 Jan 2008 23:58:27 -0500 Subject: ext4: add ext4_group_t, and change all group variables to this type. In many places variables for block group are of type int, which limits the maximum number of block groups to 2^31. Each block group can have up to 2^15 blocks, with a 4K block size, and the max filesystem size is limited to 2^31 * (2^15 * 2^12) = 2^58 -- or 256 PB This patch introduces a new type ext4_group_t, of type unsigned long, to represent block group numbers in ext4. All occurrences of block group variables are converted to type ext4_group_t. Signed-off-by: Avantika Mathur --- fs/ext4/group.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'fs/ext4/group.h') diff --git a/fs/ext4/group.h b/fs/ext4/group.h index 1577910bb58b..7eb0604e7eea 100644 --- a/fs/ext4/group.h +++ b/fs/ext4/group.h @@ -14,14 +14,16 @@ extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group, extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group, struct ext4_group_desc *gdp); struct buffer_head *read_block_bitmap(struct super_block *sb, - unsigned int block_group); + ext4_group_t block_group); extern unsigned ext4_init_block_bitmap(struct super_block *sb, - struct buffer_head *bh, int group, + struct buffer_head *bh, + ext4_group_t group, struct ext4_group_desc *desc); #define ext4_free_blocks_after_init(sb, group, desc) \ ext4_init_block_bitmap(sb, NULL, group, desc) extern unsigned ext4_init_inode_bitmap(struct super_block *sb, - struct buffer_head *bh, int group, + struct buffer_head *bh, + ext4_group_t group, struct ext4_group_desc *desc); extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap); #endif /* _LINUX_EXT4_GROUP_H */ -- cgit v1.2.3