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This will support renameat2-like operations in future.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15693
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Nobody used that anymore, most callers had passed in NULL anyway.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Nobody does anything with this anymore, we just call ReadDirName() in
sequence or do a RewindDir(). So we don't have to look at offsets as
given by the file system anymore.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
If you set "create mask = 0600" no streams will be created....
Tested manually. Not creating an automated test for this, there are so
many places where this can go wrong that testing this individual
glitch does not gain us much confidence.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15357
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This prepares the later introduction of VFS_OPEN_HOW_RESOLVE_NO_SYMLINKS,
which will be used to make use of RESOLVE_NO_SYMLINKS on linux with openat2().
Right now all terminal VFS objects reject any resolve bits with ENOSYS.
So we only prepare the vfs layer for now without any real change.
But this will make backports to 4.17 much easier.
Pair-programmed-with: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Aug 6 02:39:11 UTC 2022 on sn-devel-184
The Linux prototype for openat2 looks like this:
long openat2(int dirfd, const char *pathname,
struct open_how *how, size_t size);
where "struct open_how" is defined in "linux/openat2.h". It is
designed to be extensible with further flags.
The "size" parameter is required because there is no type checking
between userland and kernelspace, so the way for Linux to find which
version of open_how is being passed in is looking at the size:
"open_how" is expected to only every grow with additional fields,
should a change be necessary in the future.
Samba does not have this problem, we can typecheck the struct and
pointers, we expect all VFS modules to be compiled against the current
vfs.h.
For now this adds no functionality, but it will make further patches
much smaller.
Pair-programmed-with: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The main optimization is to avoid non_widelink_open() for streams
opens based on the fact that all streams opens are relative to
fsp->base_fsp, which is a pathref fsp already.
Neither streams_xattr nor streams_depot referenced dirfsp for the
streams case. Make this more obvious in the callers by passing NULL
and asserting this: non-streams opens and streams opens are just
different things, streams-opens can and do reference a base fsp and
don't need the non_widelink_open logic.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
The only place where we could have entered the mark_valid() code path
is via openat(). In openat(":stream") with O_CREAT fsp->base_fsp() is
fully opened from within create_file_unixpath(). Change
streams_depot_openat() to call the FSETXATTR from mark_file_valid()
directly. This means we don't need the expensive synthetic_pathref()
call from stream_dir() anymore.
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): Wed Apr 6 17:09:59 UTC 2022 on sn-devel-184
In streams_depot_openat() we're sure to have a valid base_fsp with a
valid stat around. We don't need the additional SMB_VFS_NEXT_STAT() in
stream_dir() in this case.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
We don't need an explicit stat(), VALID_STAT on the existing base_fsp
is sufficient.
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 Apr 1 21:18:37 UTC 2022 on sn-devel-184
We now have a single OpenDir() function that returns an NTSTATUS.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Wed Mar 2 21:58:32 UTC 2022 on sn-devel-184
As we're dealing with absolute paths here, we just need
to temporarily replace the connectpath whilst enumerating
streams.
Remove knownfail file.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14760
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Noel Power <noel.power@suse.com>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Aug 19 17:04:44 UTC 2021 on sn-devel-184
Also remove the smb_fname_base variable, just use full_fname. If
is_named_stream(full_fname)) returns false, full_fname->stream_name will be
NULL.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
If we can access the path to a file, by default we have FILE_READ_ATTRIBUTES
from the containing directory. See the section: "Algorithm to Check Access to an
Existing File" in MS-FSA.pdf.
So it's also safe to use a root opened pathref fd, as the root open is done on
the final component after a chdir() to the parent directory was done while still
impersonating the use. Qed.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Most places take twrp from a local struct smb_filename variable that the
function is working on. Some don't for various reasons:
o synthetic_smb_fname_split() is only called in very few places where we don't
expect twrp paths
o implementations of SMB_VFS_GETWD(), SMB_VFS_FS_CAPABILITIES() and
SMB_VFS_REALPATH() return the systems view of cwd and realpath without twrp info
o VFS modules implementing previous-versions support (vfs_ceph_snapshots,
vfs_shadow_copy2, vfs_snapper) synthesize raw paths that are passed to VFS NEXT
functions and therefor do not use twrp
o vfs_fruit: macOS doesn't support VSS
o vfs_recycle: in recycle_create_dir() we need a raw OS path to create a directory
o vfs_virusfilter: a few places where we need raw OS paths
o vfs_xattr_tdb: needs a raw OS path for SMB_VFS_NEXT_STAT()
o printing and rpc server: don't support VSS
o vfs_default_durable_reconnect: no Durable Handles on VSS handles, this might
be enhances in the future. No idea if Windows supports this.
o get_real_filename_full_scan: hm.... FIXME??
o get_original_lcomp: working on a raw path
o msdfs: doesn't support VSS
o vfs_get_ntquota: synthesizes an smb_filename from ".", so doesn't support VSS
even though VFS modules implement it
o fd_open: conn_rootdir_fname is a raw path
o msg_file_was_renamed: obvious
o open_np_file: pipes don't support VSS
o Python bindings: get's a raw path from the caller
o set_conn_connectpath: raw path
o set_conn_connectpath: raw path
o torture: gets raw paths from the caller
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Make rmdir_fn() a wrapper function. This will
allow us to add the dirfsp parameter.
Fix DEBUG statement so it doesn't print the wrong function name.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This simplifies (and corrects) things in the VFS as there the caller is only
interested in whether a name is pointing to a real named stream most of the times.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Make streams_depot_unlink() a wrapper calling the internal version.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
