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| 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_i.h | |
| parent | bba907433b85ba2adae1bb3b6fd29b4e5f35c468 (diff) | |
| download | op-kernel-dev-fd2d42912f9f09e5250cb3b024ee0625704e9cb7.zip op-kernel-dev-fd2d42912f9f09e5250cb3b024ee0625704e9cb7.tar.gz | |
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_i.h')
| -rw-r--r-- | include/linux/ext4_fs_i.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h index 6c610b6..2b4e370 100644 --- a/include/linux/ext4_fs_i.h +++ b/include/linux/ext4_fs_i.h @@ -30,6 +30,9 @@ typedef unsigned long long ext4_fsblk_t; /* data type for file logical block number */ typedef __u32 ext4_lblk_t; +/* data type for block group number */ +typedef unsigned long ext4_group_t; + struct ext4_reserve_window { ext4_fsblk_t _rsv_start; /* First byte reserved */ ext4_fsblk_t _rsv_end; /* Last byte reserved or 0 */ @@ -92,7 +95,7 @@ struct ext4_inode_info { * place a file's data blocks near its inode block, and new inodes * near to their parent directory's inode. */ - __u32 i_block_group; + ext4_group_t i_block_group; __u32 i_state; /* Dynamic state flags for ext4 */ /* block reservation info */ |
