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authorAvantika Mathur <mathur@us.ibm.com>2008-01-28 23:58:27 -0500
committerTheodore Ts'o <tytso@mit.edu>2008-01-28 23:58:27 -0500
commitfd2d42912f9f09e5250cb3b024ee0625704e9cb7 (patch)
tree23e85123e8cc06d518fd7cff665f93429e19e4e2 /fs/ext4/group.h
parentbba907433b85ba2adae1bb3b6fd29b4e5f35c468 (diff)
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 <mathur@us.ibm.com>
Diffstat (limited to 'fs/ext4/group.h')
-rw-r--r--fs/ext4/group.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/ext4/group.h b/fs/ext4/group.h
index 1577910bb58..7eb0604e7ee 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 */