When looking up the lowercase equivalent of a Unicode character in
ntfs_fix_file_name, no byte swapping was performed on the ntfschar used
as index into the 'locase' array. This would lead to very strange
results on big-endian systems.
This commit addresses issues where little-endian variables are emitted
raw to a log or output stream which is to be interpreted by the user.
Outputting data in non-native endianness can cause confusion for anybody
attempting to debug issues with a file system.
When the security attribute is present, chkdsk may set a null security id
in the standard attributes, and this should not be considered as an error.
(this partially reverts commit [70e5b1])
This patch changes the algorithm to use hash chains instead of binary
trees, with much stronger hashing. It also introduces useful (for
performance) parameters, such as the "nice match length" and "maximum
search depth", that are similar to those used in other commonly used
compression algorithms such as zlib's DEFLATE implementation.
The speed improvement is very significant, with some loss of compression
rate. The compression rate is still better than then Windows one.
Contributed by Eric Biggers
The new way goes via /sys/dev/block/MAJOR:MINOR to map partitions to
devices and get discard parameters of the parent device. It also ensures
that the partition is aligned to the discard block size.
Contributed by Richard W.M. Jones
fstrim(8) discards unused blocks on a mounted filesystem. It is useful for
solid-state drives (SSDs) and thinly-provisioned storage.
Only trimming the full device (with no option) is supported.
Contributed by Richard W.M. Jones
When Posix ACLs are used, the umask is ignored and the initial permissions
of created files are taken for the parent directory. However the umask
should still be used when the Posix ACLs are not enabled in the mount
options.
Ownership of files should always represent the creator of files.
This fixes a situation, currently disabled, where there is no user
mapping and the owner of the parent directory is used as the owner
of the created file.
When using Windows inheritance, the cacheing of ACLs for files created
within a directory only depended on the directory. Actually it also
depends on the user who creates the file. With the patch, only the ACLs
created by the owner of the directory are cached.
Erik Larsson
Jean-Pierre André