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ReFS doesn't support compression, but responds to set-compression FSCTLs
with NT_STATUS_OK if (and only if) the requested compression format is
COMPRESSION_FORMAT_NONE.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12144
Reported-by: Nick Barrett <nick@barrett.org.nz>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Jan 9 23:14:28 CET 2017 on sn-devel-144
This is described in
https://msdn.microsoft.com/en-us/library/cc232053.aspx
which is section 2.3.67 in the FSCC version available 2016-10-13.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Oct 14 05:31:07 CEST 2016 on sn-devel-144
ReFS doesn't support compression, but responds to get-compression FSCTLs
with a successful COMPRESSION_FORMAT_NONE response. set-compression
results in NT_STATUS_NOT_SUPPORTED.
This commit modifies Samba to match the ReFS behaviour, when run atop
a VFS that doesn't expose compression support.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12144
Reported-by: Nick Barrett
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This change implements support for FSCTL_QUERY_ALLOCATED_RANGES using
the SEEK_HOLE/SEEK_DATA functionality of lseek().
Files marked non-sparse are always reported by the ioctl as fully
allocated, regardless of any potential "strict allocate = no" savings.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
FSCTL_SET_ZERO_DATA can be used in two ways.
- When requested against a file marked as sparse, it provides a
mechanism for requesting that the server deallocate the underlying
disk space for the corresponding zeroed range.
- When requested against a non-sparse file, it indicates that the server
should allocate and zero the corresponding range.
Both use cases can be handled in Samba using fallocate(). The Linux
specific FALLOC_FL_PUNCH_HOLE flag can be used to deallocate the
underlying disk space. After doing so, a normal fallocate() call can
be used to ensure that the zeroed range is allocated on non-sparse
files.
FSCTL_SET_ZERO_DATA requests must not result in a change to the file
size. The FSCTL_SET_ZERO_DATA handler always calls fallocate() with the
KEEP_SIZE flag set, ensuring that Samba meets this requirement.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
In line with MS-FSCC 2.3.47, the FSCTL_SET_COMPRESSION ioctl allows
remote SMB2 clients to enable and disable compression on a
per-file or per-directory basis.
Compression state can be retrieved using the FSCTL_GET_COMPRESSION
request.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Add per device type ioctl handler source files for FSCTL_DFS,
FSCTL_FILESYSTEM, FSCTL_NAMED_PIPE and FSCTL_NETWORK_FILESYSTEM.
Reviewed by: Jeremy Allison <jra@samba.org>
