ext4: fix overhead calculation to account for the reserved gdt blocks
authorTheodore Ts'o <tytso@mit.edu>
Fri, 15 Apr 2022 01:31:27 +0000 (21:31 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 27 Apr 2022 11:14:11 +0000 (13:14 +0200)
commit4f658e7745517526f4af56bf88d74ea5047da980
tree31d430888655d516e7efd8ebc6483a2828584270
parentea5e8a8fe3ff5bacfba92ddc604486162d03bb9d
ext4: fix overhead calculation to account for the reserved gdt blocks

commit 10b01ee92df52c8d7200afead4d5e5f55a5c58b1 upstream.

The kernel calculation was underestimating the overhead by not taking
into account the reserved gdt blocks.  With this change, the overhead
calculated by the kernel matches the overhead calculation in mke2fs.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/ext4/super.c