The e2fsprogs and kernel implementation of directory hash tree has a
bug which causes the implementation to be dependent on whether
characters are signed or unsigned. Platforms such as the PowerPC,
Arm, and S/390 have signed characters by default, which means that
hash directories on those systems are incompatible with hash
directories on other systems, such as the x86.
To fix this we add a new flags field to the superblock, and define two
new bits in that field to indicate whether or not the directory should
be signed or unsigned. If the bits are not set, e2fsck and fixed
kernels will set them to the signed/unsigned value of the currently
running platform, and then respect those bits when calculating the
directory hash. This allows compatibility with current filesystems,
as well as allowing cross-architectural compatibility.
Addresses Debian Bug: #389772
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
for compatibility with FreeBSD. In $DEBUGFS commands, move the
-R arg argument first so that systems with non-GNU getopt()
can see the request argument (they would otherwise stop
parsing at the first non-option argument).
Mke2fs has been modified to honor the MKE2FS_SKIP_PROGRESS,
MKE2FS_DEVICE_SECTSIZE, and MKE2FS_SKIP_CHECK_MSG in order
facilitate the regression testing.
f_salveage_dir: Remove HTREE flag from the test image's
superblock. (It is not needed).
f_h_reindex: Skip this test of the htree is not enabled
f_dup_de: If htree is not enabled, clear the htree flag, and use
alternate expect scripts for the test.
Theodore Ts'o