Updating an attribute may imply decompressing runlists which are not
contiguous, leaving an unmapped region between them. When checking whether
the attribute has been made sparse, such unmapped regions should be ignored
This mostly happens after updating an index. (fix by Forrest Liu)
Windows server 2012 apparently uses files with no ACEs in their DACL,
thus denying any access to any process except system backup.
Such DACLs should however be considered valid.
When calling ntfstruncate() to expand a resident attribute, the function
is called again recursively, losing the requirement for not inserting
holes. This is for forwarding the requirement (used by ntfscp).
When testing whether a stream has been wiped out for possibly changing
its compression status, only the non-resident case was considered.
This fixes the test for streams which were never made non-resident.
Windows 8 does not zero any more the end of a compression block beyond
what is needed to reach the end of a file. We must now be careful not
to decompress more data than needed.
When translating Windows-type symlinks to Linux ones, the directory
separator has to be changed from '\' to '/'. The change was wrong
for multiple "..\" and ".\"
The file /etc/mtab is traditionally checked to avoid multiple mountings
of the same device, but this is not accurate enough in some conditions.
So use /proc/mounts when available and fall back to /etc/mtab on
systems which do not have /proc/mounts.
Author: Anton Altaparmakov <anton@tuxera.com>
Date: Tue Feb 12 10:33:55 2013 +0000
Modify libntfs-3g to make use of hd library to get the legacy BIOS geometry
from EDD. We scan all whole disk devices on the system and check if they
match the open ntfs device and if not we scan all partition devices on the
system and check if they match the open ntfs device.
If we find a partition device to match then we find its parent device again
using the hd library.
Once we have the parent of the partition device or we matched a whole disk
device we get the legacy EDD sectors per track and heads again using the hd
library.
Use of the hd library is auto detected (based on finding <hd.h> header file,
being able to link against libhd and finding the hd_list symbol in libhd.
Use can also be disabled/enabled/libhd prefix specified at ./configure time.
See ./configure --help for details.
Note this obviously requires libhd to be installed. On Ubuntu 12/04 systems
the relevant packages needed are libhd-dev and libhd16 (on older Ubuntu
versions it will be libhdN where N is some number <= 16 but an easy way to
get the right package is to simply install libhd-dev which by dependency
pulls in the correct libhdN package) whilst on SLES systems the relevant
packages needed are hwinfo and hwinfo-devel.
Upgrade the Win32 interface (win32_io.c) which was designed for Cygwin
so that it can be used for using the ntfsprogs utilities on native Windows.
Two new entries are added for truncating a file and creating a sparse
file, both of which not being supported through msvcrt.dll.
The MS_* flags originated from system constants. However the flags
passed to ntfs_mount were really unrelated to the system constants and
many new MS_* flags had to be introduced as different features were
added to the library. Those flags had no counterparts in any system
APIs, so using the same naming scheme is inappropriate.
Instead, let's namespace these flags similarly to what has already been
done in ntfsprogs/libntfs earlier. This avoids any possible conflicts
with system constants.
The values of the flags themselves are kept the same as earlier, so
backward compatibility is retained.
- Replaced 'ntfschar*' parameters with 'const ntfschar*' where
appropriate (the function does not need to modify the string).
- Replaced some instances of 'u8*' and 'char*' read-only buffer
arguments with 'const u8*' and 'const char*'.
Replace the obsolete definition of reparse tags in layout.h by the
current definitions from msdn, and use them in reparse.c instead of
redefining them.
As the path passed to ntfs-3g for getxattr(2)/setxattr(2) are not
guaranteed to be the one mentioned by the caller when there are hard links,
getting/setting DOS names have to be discontinued in that situation.
Getting/setting DOS names is still possible when there is a single
non-DOS name.
Windows 8 includes a "fast restart" feature for restarting without fully
remounting the internal volumes. When this mode is selected, metadata
stored in the cache (probably hiberfil.sys) is used instead of what
is actually on disk, and this may lead to inconsistencies when changes
have been made by ntfs-3g in the meantime.
This patch tries to prevent ntfs-3g from mounting in read-write mode
when a fast restart of Windows 8 is detected. It relies on the restart
pages in the $LogFile being identified as version 2.0, which is
apparently related to data being cached for hibernation or fast restarting.
External devices, such as USB keys, may have a switch to make them
temporarily unwriteable. When such a device is plugged in, mount it
as read-only by default.
In the $LogFile, Windows 8 defines restart pages with version 2.0.
The checks designed for version 1.1 appear to apply, so accept v 2.0
and apply the usual checks.
Accept security descriptors in which the SACL is present though it does not
contain any ACE. Such security descriptors have been found in Windows
installation files.
The type of special files (symlinks, fifos, etc.) was not returned in
readdir() and they appeared wrongly in the field d_type of "struct dirent".
This prevented some applications which relied on d_type (which does
not exist in Solaris) from navigating in an NTFS tree.
Appending data to a file is done in two steps : first extending the
file to the required size, then inserting data in the created space.
There is no need to recompute the runlist at the end of the first
step, just be sure the original configuration is rolled back if inserting
data leads to an error.
When the target of a junction or a Windows-type symlink references another
junction or symlink, the search for the full path on the current partition
and its translation for case-sensitive access is interrupted. The target can
now be dereferenced, provided the end of the path needed no translation.
So far the set-group-id flag could be set in a chmod. This patch enables
the inheritance of the group to files and subdirectories, and the
inheritance of the set-group-id flag to subdirectories.
The suggestion to use option remove_hiberfile was displayed in the
standard help and when a volume is found dirty. As this option may
lead to loss of data, only mention it in the manual, with a proper
warning.
Under some conditions, Windows defines an ACL inheritance for an
unidentified authenticated user. With this patch, such an unidentified
user is treated as any user (same as "world").
When the hide_dot_files option is set, a file is marked hidden if the
first character in its name is a dot. This patch updates the hidden flag
when the file is renamed or hard linked (useful for text editors which
create files with a temporary name)
When a file is deleted, there is no need to remove its last name in
the deleted MFT record. The name may be useful for undeleting the file
later (Windows also does not delete the name).
Checking supplementary groups permissions to access a file relies on
a supplementary group list available in /proc/PID. This patch adds a
variant to implement the checks based on the specific format used
by OpenIndiana.
On Windows XP and Vista, the system hibernation is identified by the
sequence "hibr" at the beginning of hiberfil.sys. This had been changed
to "HIBR" in Windows 7, so both sequences have to be accepted as
hibernation criteria.
When the cluster size is bigger than the index block size, the index
block size unit is 512 (not the sector size) instead of the cluster size.
The partitions formatted by mkntfs and used by ntfs-3g were not
interoperable with Windows when the cluster size is bigger than 4K
and the sector size is not 512.
When computing the runlist for the first non-resident write to an
attribute, an inconsistency was created between the attribute image
and the ntfs_attr structure, which could cause an MFT record overflow
when the first write is huge and fragmented (reported by Vito Caputo).
With the default mount options, compression of new files are now done
if the parent directory is marked for compression. The mount option
"compression" is not needed any more, but the option "nocompression"
can be used to disable compression of new files.
The default option also applies to applications using libntfs-3g with
no mount command.
Jean-Pierre André
Erik Larsson