tree 23e85123e8cc06d518fd7cff665f93429e19e4e2
parent bba907433b85ba2adae1bb3b6fd29b4e5f35c468
author Avantika Mathur <mathur@us.ibm.com> 1201582707 -0500
committer Theodore Ts'o <tytso@mit.edu> 1201582707 -0500

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>