ext4: don't update checksum of new initialized bitmaps
authorTheodore Ts'o <tytso@mit.edu>
Mon, 19 Feb 2018 19:16:47 +0000 (14:16 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 19 Feb 2018 19:16:47 +0000 (14:16 -0500)
commit044e6e3d74a3d7103a0c8a9305dfd94d64000660
tree0979b1eb9ecf8bacd28b0eced5cf53463eb1856c
parent85e0c4e89c1b864e763c4e3bb15d0b6d501ad5d9
ext4: don't update checksum of new initialized bitmaps

When reading the inode or block allocation bitmap, if the bitmap needs
to be initialized, do not update the checksum in the block group
descriptor.  That's because we're not set up to journal those changes.
Instead, just set the verified bit on the bitmap block, so that it's
not necessary to validate the checksum.

When a block or inode allocation actually happens, at that point the
checksum will be calculated, and update of the bg descriptor block
will be properly journalled.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
fs/ext4/balloc.c
fs/ext4/ialloc.c