bareos2015: bareos-14.2 2242e405
|mvwieringen||mvwieringen||bareos-14.2||2013-12-09 15:12:52||bareos-14.2 3bdfdd8f||Pending|
|Affected Issues||0000008: Handle Windows Encrypted Files using Win raw encryption|
|0000228: Some windows file attributes are not handled.|
|Changeset||Bring windows support up to Windows 2012 server.
This commit bring the windows code to support all new
features that have been added to windows up till windows
2012 server. We also reindented a lot of code along the
way to be more readable and fixes most comments.
The actual added features:
- Volume Mountpoints support (VMP).
Windows for some version now supports so called Volume
MountPoint which allow you to mount a volume somewhere
in the filesystem layout analog to what UNIX has been
doing since it inception without assigning a drive letter.
We need to make sure we also add the VMPs to the VSS snapshot
list otherwise the backup will fail.
- Use GetFileInformationByHandleEx to get real changetime.
As it seems ctime in the stat struct on UNIX means for
some time now the last change time of the inode and not
the creation time. On Windows we need a special API to
get the actual change time named GetFileInformationByHandleEx().
While implementing this new feature we reformated some of
the layout and dropped some unused code.
- Windows dedup support
Windows 2012 has dedup support which needs handling.
To get rehydrated data when reading the file you should open
the file without the FILE_FLAG_OPEN_REPARSE_POINT flag set.
If you want to read the deduped data effeciently you need to
write new code which interfaces to a new API which is currently
out of scope. The original file on the filesystem is replaced
with a so called reparse point so if we open the reparse point
instead of where it points to we get data which has a pointer
to a map of all the data streams and chunks required to
ârehydrateâ the file and not its actual data.
We now changed the stat emulation functions to detect the special
reparse point with type IO_REPARSE_TAG_DEDUP which indicates
a deduped file.
When that is set we set a special bit on the file so we know we
need to open the file with the O_NOFOLLOW flag which will open
the file without the FILE_FLAG_OPEN_REPARSE_POINT flag set.
More info at:
- Store all file attributes
Windows has gathered quite some special specific file
flags over the years but not all are saved during backup so
some are never restored by the restore process. The most
important ones are the ARCHIVE flag which is "misused" by
some programs for storing some special information. Others
that are known not to be stored are the COMPRESSED flag which
means that a restored file looses it and will be restored as
an uncompressed file.
As we are running out of opportunities to store the special
flags as some mode in the st_mode member of the stat struct
a redesign was needed to store the unique file flag somewhere
else. We are reusing the st_rdev field. That is already used for
reparse points in older versions but as those are never restored
anyway we can reuse them without breaking backwards compatability.
- Support for Windows EFS filesystems
Windows has for quite some time now support for a so called EFS
filesystem. This is an encrypted filesystem, to be able to backup the
data and to restore it we need to use a special API. With this API you
in essence export the data on backup and import it on restore. This
way you never have access to the unencrypted data but just import and
export the encrypted data. This is the cleanest way of handling
encryption by just seeing the data as some opaque data and not try to
do anything special with it. The problem with the restore API is
however that it kind of works in a completely different way then a
normal read/write API. You call a import function and that call the
read callback multiple times until all data is imported/restored. As
we don't want to rewrite the whole internal works of the filed for
this we now create a seperate thread that runs during the whole
restore of a filesystem and behaves as a consumer/producer problem
(well known in the pthreads world). In this solution the producer is
the filed that produces encrypted data out of the incoming data
streams from the storage daemon and the seperate thread consumes that
data by returning it as encrypted data in the callback function issues
by the special EFS import API. There is some synchronization between
the different threads so it knows when one file is done and it should
end the import of that file. We also keep some of the buffers
lingering around so we don't need to do malloc/free/malloc loops all
the time, we cleanup the whole thread and the buffers used at the end
of the whole restore process.
Fixes 0000228: Some windows file attributes are not handled.
Fixes 0000008: Handle Windows Encrypted Files using Win raw encryption
Signed-off-by: Marco van Wieringen <email@example.com>
|mod - src/filed/backup.c||Diff File|
|mod - src/filed/crypto.c||Diff File|
|mod - src/filed/dir_cmd.c||Diff File|
|mod - src/filed/fd_plugins.c||Diff File|
|mod - src/filed/filed.c||Diff File|
|mod - src/filed/fileset.c||Diff File|
|mod - src/filed/protos.h||Diff File|
|mod - src/filed/restore.c||Diff File|
|mod - src/filed/verify.c||Diff File|
|mod - src/findlib/attribs.c||Diff File|
|mod - src/findlib/bfile.c||Diff File|
|mod - src/findlib/bfile.h||Diff File|
|mod - src/findlib/create_file.c||Diff File|
|mod - src/findlib/find.c||Diff File|
|mod - src/findlib/find.h||Diff File|
|mod - src/findlib/find_one.c||Diff File|
|mod - src/findlib/mkpath.c||Diff File|
|mod - src/findlib/protos.h||Diff File|
|mod - src/include/baconfig.h||Diff File|
|mod - src/include/bareos.h||Diff File|
|mod - src/include/bc_types.h||Diff File|
|mod - src/include/jcr.h||Diff File|
|mod - src/lib/Makefile.in||Diff File|
|add - src/lib/cbuf.c||Diff File|
|add - src/lib/cbuf.h||Diff File|
|mod - src/plugins/filed/fd_common.h||Diff File|
|mod - src/win32/Makefile||Diff File|
|mod - src/win32/Makefile.inc||Diff File|
|mod - src/win32/compat/compat.c||Diff File|
|mod - src/win32/compat/include/compat.h||Diff File|
|mod - src/win32/compat/include/mingwconfig.h||Diff File|
|mod - src/win32/compat/print.c||Diff File|
|mod - src/win32/compat/winapi.c||Diff File|
|mod - src/win32/console/Makefile||Diff File|
|mod - src/win32/filed/Makefile||Diff File|
|mod - src/win32/filed/vss.c||Diff File|
|mod - src/win32/filed/vss_generic.c||Diff File|
|mod - src/win32/findlib/Makefile||Diff File|
|add - src/win32/findlib/win32.c||Diff File|
|mod - src/win32/include/vss.h||Diff File|
|mod - src/win32/include/winapi.h||Diff File|
|mod - src/win32/lib/Makefile||Diff File|
|mod - src/win32/plugins/filed/Makefile||Diff File|