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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 destructor triggered by dbwrap_watched_watch_recv() will
remove the watcher instance via a dedicated dbwrap_do_locked(),
just calling dbwrap_watched_watch_remove_instance() inside.
But the typical caller triggers a dbwrap_do_locked() again after
dbwrap_watched_watch_recv() returned. Which means we call
dbwrap_do_locked() twice.
We now allow dbwrap_watched_watch_recv() to return the existing
instance id (if it still exists) and removes the destructor.
That way the caller can pass the given instance id to
dbwrap_watched_watch_remove_instance() from within its own dbwrap_do_locked(),
when it decides to leave the queue, because it's happy with the new
state of the record. In order to get the best performance
dbwrap_watched_watch_remove_instance() should be called before any
dbwrap_record_storev() or dbwrap_record_delete(),
because that will only trigger a single low level storev/delete.
If the caller found out that the state of the record doesn't meet the
expectations and the callers wants to continue watching the
record (from its current position, most likely the first one),
dbwrap_watched_watch_remove_instance() can be skipped and the
instance id can be passed to dbwrap_watched_watch_send() again,
in order to resume waiting on the existing instance.
Currently the watcher instance were always removed (most likely from
the first position) and re-added (to the last position), which may
cause unfair latencies.
In order to improve the overhead of adding a new watcher instance
the caller can call dbwrap_watched_watch_add_instance() before
any dbwrap_record_storev() or dbwrap_record_delete(), which
will only result in a single low level storev/delete.
The returned instance id is then passed to dbwrap_watched_watch_send(),
within the same dbwrap_do_locked() run.
It also adds a way to avoid alerting any callers during
the current dbwrap_do_locked() run.
Layers above may only want to wake up watchers
during specific situations and while it's useless to wake
others in other situations.
This will soon be used to add more fairness to the g_lock code.
Note that this commit only prepares the api for the above to be useful,
the instance returned by dbwrap_watched_watch_recv() is most likely 0,
which means the watcher entry was already removed, but that will change
in the following commits.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15125
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@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>
This reverts commit 322574834f1e71bc01f21be9059ca4d386517c84.
Not strictly a revert anymore, but for future work we do need "dirfsp"
in create_file_default() passed through the VFS.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This will enable a simplification in the stream-handling openat vfs
routines.
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>
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>
We currently allow setting the delete on close bit for
a directory containing only explicitly hidden/vetoed files
in the case where "delete veto files = yes" *and*
"delete veto files = no". For the "delete veto files = no"
case we should be denying setting the delete on close bit
when the client tries to set it (that's the only time Windows
looks at the bit and returns an error to the user). We
already do the in the dangling symlink case, we just
missed it in the !is_visible_fsp() case.
Mark SMB2-DEL-ON-CLOSE-NONWRITE-DELETE-NO as knownfail
for now.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15023
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Noel Power <npower@samba.org>
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
Run vfstest with this vfstest.cmd under valgrind and you'll see what
happens. Exact explanation a few patches further down...
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Trying to open a symlink as a terminal component should return
NT_STATUS_OBJECT_NAME_NOT_FOUND, not NT_STATUS_OBJECT_PATH_NOT_FOUND.
Mark as knownfail.d/simple_posix_open until we fix the server.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14911
Signed-off-by: Jeremy Allison <jra@samba.org>
fd_close() mostly wraps SMB_VFS_CLOSE() but also takes care of refcounting
fsp->fh properly and also makes sure that fsp->fh->fd is set to -1 after close.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This must be done before doing POSIX calls on a connection.
Remove the final entry in knownfail.d/posix_infolevel_fails
samba3.smbtorture_s3.plain.POSIX-BLOCKING-LOCK.smbtorture\(nt4_dc_smb1\)
And remove the file knownfail.d/posix_infolevel_fails itself.
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): Sat Dec 11 12:03:36 UTC 2021 on sn-devel-184
source3/torture/torture.c:4309:17: error: ‘pname’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
4309 | printf("qfilename gave different name? [%s] [%s]\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4310 | fname, pname);
| ~~~~~~~~~~~~~
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Dec 11 00:25:46 UTC 2021 on sn-devel-184
This is pre WindowXP SMB1 functionality, and we
need to remove this from the server in order to
move towards SMB2-only, so the test must go.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This is not strictly needed, but makes it easier to audit
that we don't miss important places.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14556
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Exposes an existing problem where "ret" is overwritten
in the directory scan.
Add knownfail.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14892
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Its initial commit in 2008 stated that it still needs to be integrated
into the test suite. As far as I can see, this never happened.
Why remove it? Without this we can make rpc_open_tcp() static for
easier refactoring.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This will allow the usage 'POSIX Basic Regular Expression'
instead of 'ms wildcard' strings.
We allow exactly one 'subexpression' starting with '\(' and
ending with '\)' in order to find a replacement (byte) region
in the matching string.
This will be used in the vfs_preopen module in the following
commits.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This aims to replace the current is_in_path() code in the long run.
For now it implements samba_path_matching_mswild_create()
in order to replace is_in_path() in the long run.
But there will be other "backends" using regexec() too.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
I want to assert at least some of the behavior as the
next commits will add a new abstraction that should
at least partly behave the same.
Note: case_[in]sensitive_idx is the index to the patterns
in the namelist, set to -1 on non-match, otherwise to
a value >= 0.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This ensure we never blunder into indirecting a NULL fsp pointer
in the server. Currently this crashes the server in several info
levels.
Add knownfail.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14742
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Noel Power <npower@samba.org>
