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| author | Avantika Mathur | 2008-01-29 05:58:27 +0100 |
|---|---|---|
| committer | Theodore Ts'o | 2008-01-29 05:58:27 +0100 |
| commit | fd2d42912f9f09e5250cb3b024ee0625704e9cb7 (patch) | |
| tree | 23e85123e8cc06d518fd7cff665f93429e19e4e2 /fs/ext4/group.h | |
| parent | ext4 extents: remove unneeded casts (diff) | |
| download | kernel-qcow2-linux-fd2d42912f9f09e5250cb3b024ee0625704e9cb7.tar.gz kernel-qcow2-linux-fd2d42912f9f09e5250cb3b024ee0625704e9cb7.tar.xz kernel-qcow2-linux-fd2d42912f9f09e5250cb3b024ee0625704e9cb7.zip | |
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.h | 8 |
1 files changed, 5 insertions, 3 deletions
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 */ |