diff options
| author | Avantika Mathur <mathur@us.ibm.com> | 2008-01-28 23:58:27 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-01-28 23:58:27 -0500 |
| commit | fd2d42912f9f09e5250cb3b024ee0625704e9cb7 (patch) | |
| tree | 23e85123e8cc06d518fd7cff665f93429e19e4e2 /include/linux/ext4_fs.h | |
| parent | bba907433b85ba2adae1bb3b6fd29b4e5f35c468 (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 'include/linux/ext4_fs.h')
| -rw-r--r-- | include/linux/ext4_fs.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h index 5e2da0974d16..e1103c2a0d42 100644 --- a/include/linux/ext4_fs.h +++ b/include/linux/ext4_fs.h @@ -830,7 +830,7 @@ struct ext4_iloc { struct buffer_head *bh; unsigned long offset; - unsigned long block_group; + ext4_group_t block_group; }; static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) @@ -855,7 +855,7 @@ struct dir_private_info { /* calculate the first block number of the group */ static inline ext4_fsblk_t -ext4_group_first_block_no(struct super_block *sb, unsigned long group_no) +ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) { return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); @@ -886,8 +886,9 @@ extern unsigned int ext4_block_group(struct super_block *sb, ext4_fsblk_t blocknr); extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, ext4_fsblk_t blocknr); -extern int ext4_bg_has_super(struct super_block *sb, int group); -extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group); +extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); +extern unsigned long ext4_bg_num_gdb(struct super_block *sb, + ext4_group_t group); extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode, ext4_fsblk_t goal, int *errp); extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode, @@ -900,7 +901,7 @@ extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb, extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *); extern void ext4_check_blocks_bitmap (struct super_block *); extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, - unsigned int block_group, + ext4_group_t block_group, struct buffer_head ** bh); extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); extern void ext4_init_block_alloc_info(struct inode *); |