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Since 4.16 stat opens will have a real fd, the only case where currently the fd
can still be -1 is a POSIX request on a symlink.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
SMB_VFS_READLINKAT() just looks at the basename, we can avoid the
relname being talloc'ed
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Can easily be seen by doing make test TESTS=fruit
and looking in st/nt4_dc/smbd_test.log.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15210
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Wed Nov 16 06:00:56 UTC 2022 on sn-devel-184
This code is young enough to justify a README.Coding patch, at least
IMO.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Allows close_file_in_loop() to differentiate between SHUTDOWN_CLOSE
(previously it only used this close type) and ERROR_CLOSE - called
on error from smbXsrv_tcon_disconnect() in the error path. In that
case we want to close the fd, but not run any delete-on-close actions.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15128
Signed-off-by: Jeremy Allison <jra@samba.org>
Reivewed-by: Noel Power <npower@samba.org>
Autobuild-User(master): Noel Power <npower@samba.org>
Autobuild-Date(master): Thu Aug 18 14:10:18 UTC 2022 on sn-devel-184
Returns NT_STATUS_OBJECT_PATH_NOT_FOUND for directory component.
Note IS_VETO_PATH only looks at the last component, so we must
do it during the directory walk on each component.
Note, we also have to check after a call to get_real_filename_at()
as it may have demangled the client sent name into a filesystem
name that matches the "veto files" parameter.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15143
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This will reduce the amount of syscalls and the related cost drastically
for long path names.
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
This is no likely to happen as we use O_NOFOLLOW with O_DIRECTORY,
but it's better to be prepared...
This will be more important in the upcoming openat2(RESOLVE_NO_SYMLINK)
case, but we should be consitent...
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
I guess we should catch NT_STATUS_OBJECT_NAME_INVALID first,
currently the check is already done in check_path_syntax*,
but we may remove it in future.
But the most important reason for this is the
openat2(RESOLVE_NO_SYMLINK) optimization, which will
be introduced in the following commits.
Review with: git show -w
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
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>
Further up we add O_PATH manually. Initial development versions of
this code did set the is_pathref, but then I found this potential
problem. I forgot to remove this incarnation of is_pathref=true, doing
it now.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is a subtle one. The dirfsp returned by openat_pathref_dirfsp_nosymlink()
can be used inside open.c and passed to check_parent_access_fsp() to
check if a delete_on_close flag has been set on an existing "real"
open fsp. So the file_id must be correctly set in order for this
to work. Without it, samba3.base.delete fails in deltest20 when
we convert reply_open_and_X() to use filename_convert_dirfsp().
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Instead of just assigning smb_fname->fsp = fsp.
This makes the logic match that of openat_pathref_fullname() and parent_pathref()
when returning smb_fnames with associated pathref fsp's.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
This does a step-by-step path resolution for a directory by splitting
up the path into individual components and does a loop like that
for component in components:
fd = openat(dirfd, component, O_NOFOLLOW);
close(dirfd);
dirfd = fd
and it will report any symlink it finds in a way that will be
indirectly consumable for the smb2 symlink error response.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
The main point of this function was to avoid fd_openat() and thus the
expensive non_widelink_open(). Now that fd_openat() has the direct
SMB_VFS_OPENAT() fast-path for streams, we can avoid duplicating the
logic in open_stream_pathref_fsp() again.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Rename it to openat_pathref_fullname(), it will be used for stream
open next
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Would not have hurt either, but this makes the next patch easier to
verify properly
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Remove the implicit recursion
openat_pathref_fsp->openat_pathref_base_fsp->openat_pathref_fsp
by introducing openat_pathref_nostream() and use
open_stream_pathref_fsp() where possible. openat_pathref_nostream()
will change its name in further refactoring patches, but for
understanding this patch I think this name is good :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@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>
For the current callers this does not make a difference, they have
already allocated *_smb_fname as a talloc child of fsp, but the next
patches will add one where it does.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
"::$DATA" is the main file, we don't need the overhead of base_fsp here.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
We open "." fixed here, and fd_openat (or rather SMB_VFS_OPENAT) will
tell us if "dirfsp" does not point at a proper directory
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Björn Baumbach <bb@sernet.de>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Sat Jul 9 09:04:46 UTC 2022 on sn-devel-184
Originally I added the assert here as we can't return the error being in a
talloc destructor. But OEMs prefer error log messages over crashes.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Fri Jul 8 09:04:28 UTC 2022 on sn-devel-184
Tree-wide spellcheck for some common misspellings.
source3/utils/status.c has misspelled local variable (unkown_dialect).
"missmatch" is a known historical misspelling, only the incorrect
misspellings are fixed.
source3/locale/net/de.po has the spelling error (unkown) in two msgids -
it probably should be updated with current source.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Covscan:
source3/smbd/files.c:575: check_after_deref: Null-checking "fsp" suggests that it
may be null, but it has already been dereferenced on all paths leading to the check.
Signed-off-by: Pavel Filipenský <pfilipen@redhat.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat May 14 04:41:57 UTC 2022 on sn-devel-184
Signed-off-by: Pavel Filipenský <pfilipen@redhat.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
As part of the filename_convert() process, keep a pathref dirfsp of
the containing directory for later use. This avoids having to do
another non_widelink_open() on every SMB2_CREATE and ntcreate&x in
later patches.
Future work will be to go through other filename_convert() calls and
make them use filename_convert_dirfsp(). If we manage to convert all
of them except the one in filename_convert_dirfsp() itself, we can
simplify filename_convert() and unix_convert() significantly.
Too large a patch, but I don't know how to split this up into smaller
logic pieces.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
If we have a directory pathref fsp, do an openat(dirfd, ".", O_RDONLY)
to cheaply get a real directory handle.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
If openat_pathref_fsp() fails, callers might want to inspect the stat
info. If we really failed on STOPPED_ON_SYMLINK, the caller might need
to know this, although openat_pathref_fsp() masked this error.
As there is no smb_fname->fsp returned from openat_pathref_fsp() on
error, we need to pass this up in smb_fname itself.
This essentially reverts de439cd030, which does basically the same
thing but is too specific. We need to cover the general !O_PATH case
more broadly.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Slight simplification now possible after introducing and using
fsp_is_alternate_stream() almost everywhere.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
If doing an SMB_VFS_FSTAT() returning onto the stat struct stored in the fsp,
we must call vfs_stat_fsp() as this preserves the iflags.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15022
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
openat_pathref_fsp() does not need them anymore
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Fri Mar 11 19:19:21 UTC 2022 on sn-devel-184
With the simplifications in non_widelink_open() (don't depend on the
is_directory fsp flag) the main reason for requiring a valid stat
struct in openat_pathref_fsp() is gone. With this change
openat_pathref_fsp() is now capable of being the very first (and
authoritative) name-referencing operation with openat(O_PATH) for a
name.
Without having the stat information around before calling
openat_pathref_fsp(), the call to check_same_dev_ino() becomes
obsolete here.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
