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Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Signed-off-by: Trever L. Adams <trever.adams@gmail.com>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Fri Oct 14 01:44:02 CEST 2016 on sn-devel-144
* tevent_update_timer() and tevent_req_reset_endtime() have been added
* documentation updates
* it is now safe to talloc_free() a tevent_threaded_context,
all running threads keep running until they're finished,
but we no longer abort().
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Wed Oct 5 15:32:35 CEST 2016 on sn-devel-144
We might decide at some point that we don't want a request to
time out
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
I did not find a way to do this safely without a mutex per threaded_context.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This prepares tevent run-down with active threads.
It has the advantage to not depend on talloc'ed structs. It is needed to make
talloc_free(tevent_context) safe when tevent_threaded_contexts are still
around.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This makes the reading end of the signalling pipe special: If we have eventfd,
this is the same as the write fd. Without eventfd, it will have to be a
separate fd. This moves the requirement to #ifdef from the writing end to the
reading end. Why? We'll use the writing end somewhere else too soon, and this
patch avoids an #ifdef in that new place.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This will be a quicker way to time out sending sockets in messaging_dgm. Right
now cleanup of out-sockets is a bit coarse. The ideal would be to kill a socket
after being idle n seconds. This would mean to free and re-install a timer on
every packet. tevent_update_timer will be quite a bit cheaper.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Look for an exact match first, before a free slot.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12272
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Sep 19 07:12:00 CEST 2016 on sn-devel-144
This ensures the destructors get called in the proper order.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12272
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
The server principal is required, so if not set create an obscure one.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This reverts commit c0e8616669.
The krb5_init_keyblock function from MIT allocates the key but we
operate only on the contents.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Sep 6 23:16:34 CEST 2016 on sn-devel-144
Signed-off-by: Anoop C S <anoopcs@redhat.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Thu Sep 1 21:02:54 CEST 2016 on sn-devel-144
This allows us to find links that need to be expunged
without passing the whole DB up in the search response.
While each message still needs to be examined, this code
only has to do memory allocation for entries with links
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This also removes the asn1util dependency from krb5_wrap and moves it to
libads which is the only user.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
krb5_free_error() is availalbe in MIT and Heimdal. Both implementations
free the contents and the pointer. krb5_free_data_contents() is Heimdal
only. Which function you need to call depends.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Use a better and consistent name and switch the arguments to reflect the
name.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
LDB_UNPACK_DATA_FLAG_NO_VALUES_ALLOC allows us to consolidate some of these allocations
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Douglas Bagnall <dbagnall@samba.org>
Autobuild-Date(master): Wed Aug 31 10:53:09 CEST 2016 on sn-devel-144
Instead, we pay the cost of allocating a copy of the whole message once
and we pay the cost of allocating a "struct ldb_val" that will not be used
for each element in that message.
This differes from the approach of ldb_unpack_data_only_attr_list()
in that we need not allocate each value for a message that we do not
return, so is more efficient for large multi-valued attributes and
un-indexed or poorly indexed searches
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12168
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Aug 24 05:32:15 CEST 2016 on sn-devel-144
* add tevent_threaded_context_create() and tevent_threaded_schedule_immediate()
They add a way to pass the thread result from a helper thread into
the main event loop.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
According to the manpage, eventfd is cheaper than a pipe. At least, we can save
a file descriptor and space for it in struct tevent_context :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Purely cosmetic change: This moves closing the signal/thread event pipe
to where it's opened. This prepares the eventfd support, making the
"magic" for eventfd more obvious.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
No functionality change. This just looks better in objdump --disassemble :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is infrastructure to improve our async r/w result handling and latency.
The pthreadpool signalling goes through a pipe. This has downsides: The main
event loop has to go through a read on the pipe before it can ship the result.
Also, it is not guaranteed by poll/epoll that the pthreadpool signal pipe is
handled with top priority. When an async pread/pwrite has finished, we should
immediately ship the result to the client, not waiting for anything else.
This patch enables tevent_immediate structs as job signalling. This means a
busy main tevent loop will handle the threaded job completion before any timed
or file descriptor events. Opposite to Jeremy's tevent_thread_proxy this is
done by a modification of the main event loop by looking at a linked list under
a central mutex.
Regarding performance: In a later commit I've created a test that does nothing
but fire one immediate over and over again. If you add a phread_mutex_lock and
unlock pair in the immediate handler, you lose roughly 25% of rounds per
second, so it is measurable. It is questionable that will be measurable in the
real world, but to counter concerns activation of immediates needs to go
through a new struct tevent_threaded_context. Only if such a
tevent_threaded_context exists for a tevent context, the main loop takes the
hit to look at the mutex'ed list of finished jobs.
This patch by design does not care about talloc hierarchies. The idea is that
the main thread owning the tevent context creates a chunk of memory and
prepares the tevent_immediate indication job completion. The main thread hands
the memory chunk together with the immediate as a job description over to a
helper thread. The helper thread does its job and upon completion calls
tevent_threaded_schedule_immediate with the already-prepared immediate. From
that point on memory ownership is again transferred to the main thread.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signalling the main event loop will also happen from threads soon, and
that will use the same mechanism. This also keeps the pipe open after the last
signal handler is removed. Threaded jobs will come and go very frequently, and
always setting up and tearing down the pipe for each job will be expensive.
Also, this is "just" two file descriptors, and with eventfd just one.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This will be used in tevent soon
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Sat Aug 20 13:38:37 CEST 2016 on sn-devel-144
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Aug 11 23:49:38 CEST 2016 on sn-devel-144
This can be used to emulate folder quotas, as explained in the
modified manpage.
Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Aug 9 18:20:00 CEST 2016 on sn-devel-144
Allow callers to pass in socket fds that where already passed to an
earlier call of async_connect_send(). Callers expect this behaviour and
it was working until 05d4dbda83 broke it.
The proper fix would be to change callers to close the fd and start from
scratch with a fresh socket.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12105
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Thu Aug 4 05:03:21 CEST 2016 on sn-devel-144
This avoids allocation of every value during a re-index scan
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This is used in the index code in particular to avoid an allocation per value
(as there may be one value per DB object at times
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Because the memory layout will change in the next commit, we need to add
a talloc_steal() of msg, which holds the memory on one big chunk.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This function allows us to control allocation of memory during parse
of the packed ldb data.
This in turn can have an important performance impact as each
small allocation can have a large overhead
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
talloc_realloc() requires that we know the correct parent to do the 0 -> free behaviour
and we do not have the correct parent here, list->dn may be a child of the module->idxptr
cache.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This avoids a number of pointless and pointlessly-large allocations
in inner loops.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This DN can not already be in the list, because it is being
added to this DB for the first time just now.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Pair-programmed-with: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Jul 26 16:42:16 CEST 2016 on sn-devel-144
Heimdal and MIT Kerberos have different API to copy credentials from a
ccache. Wrap it via lib/krb5_wrap/.
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Mon Jul 25 21:27:58 CEST 2016 on sn-devel-144
Guenther
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Sat Jul 23 09:50:46 CEST 2016 on sn-devel-144
This adds 40 bytes, but they are needed for correctness :-)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Fri Jul 22 23:33:57 CEST 2016 on sn-devel-144
This is one of or hottest code paths, I think every bit counts here.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This is one of or hottest code paths, I think every bit counts here.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
For any reasonably large domain, the old KCC is impractical as the dense
mesh topology causes replication pulses.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
MIT only defined this as CKSUMTYPE_HMAC_SHA1_96_AES128,
while Heimdal has CKSUMTYPE_HMAC_SHA1_96_AES_128.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
If it is called in the middle of a script such as samba-tool, memory
would be hanging from both the actual NULL context and the
talloc_null_context (causing a segfault at system_exit).
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
To keep line lengths short, the code is re-factored to the
early return pattern.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
We must not list any services that we skip building, as otherwise all RPC services fail to start.
We now build without the source4 spoolss server in non-developer builds
This fixes commit 0b4c741b9c
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12025
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This reverts commit 5d85fd8546.
Breaks compile for older (<= 4.4) gccs.
Needs to be done differently.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This reverts commit 2991f77099.
Breaks compile for older (<= 4.4) gccs.
Needs to be done differently.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This reverts commit 7c9505e651.
Breaks compile for older (<= 4.4) gccs.
Needs to be done differently.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This gains a few percent in tdbbackup
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Fri Jul 15 00:52:00 CEST 2016 on sn-devel-144
We expect these macros to generate tautological compares
intentionally, so disabling the warning is just fine.
This lets --pick-developer work with gcc6 and newer.
Pair-Programmed-With: Michael Adam <obnox@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Signed-off-by: Ira Cooper <ira@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Jul 14 05:44:21 CEST 2016 on sn-devel-144
We expect these macros to generate tautological compares
intentionally, so disabling the warning is just fine.
This lets --picky-developer work with gcc6 and newer.
Pair-Programmed-With: Ira Cooper <ira@samba.org>
Signed-off-by: Ira Cooper <ira@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
We expect these macros to generate tautological compares
intentionally, so disabling the warning is just fine.
This lets --picky-developer work with gcc6 and newer.
Pair-Programmed-With: Michael Adam <obnox@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Signed-off-by: Ira Cooper <ira@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Comment on two similar conditions in tevent_standard.c, which,
otherwise, at a first glance, seem useless, i.e. always true.
The conditions checking glue->epoll_ops for being non-NULL, imply that
it *can* be NULL. A casual reader would not generally expect a "member"
function to modify its container's pointer in a container higher up, and
would assume that glue->epoll_ops could be NULL before the call,
resulting in a near-NULL pointer dereference.
However, in this case epoll_ops is indeed cleared in those "member"
functions, in the case of an epoll interface failure, to signify
fallback to poll interface.
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
Autobuild-User(master): Uri Simchoni <uri@samba.org>
Autobuild-Date(master): Tue Jul 12 13:56:41 CEST 2016 on sn-devel-144
In contrast to source3, this is run as root and without substitution.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Bob Campbell <bobcampbell@catalyst.net.nz>
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Pair-programmed-with: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sun Jul 3 18:11:30 CEST 2016 on sn-devel-144
Make it use a struct talloc_chunk *tc parameter. Define _talloc_free_internal()
in terms of _tc_free_internal().
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Rename 'ptc' pointer to parent as it's re-used as
that name later in the function.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Define talloc_vasprintf() in terms of _vasprintf_tc().
We will use _vasprintf_tc() internally later.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
First argument is now struct talloc_chunk *tc.
Ensure all callers pass correct talloc chunk from given pointer.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
We will be adding more and it ensures a consistent naming scheme.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Make sure the lrbsda pointer is not allocated and we will
not end up dereferencing a NULL pointer. In practice this
can't happen, but this change links the pointer with the
code that uses it.
Found by Coverity.
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): Thu Jun 30 02:53:02 CEST 2016 on sn-devel-144
The name must be a hard-coded value from struct ldb_dn_extended_syntax
so just point to that constant pointer
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
systemd 230 version finally deprecated
libsystemd-daemon/libsystemd-journal split and put everything in
libsystemd library.
Make sure HAVE_LIBSYSTEMD define is supported in the code (we already
have it defined by the waf).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11936
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Richard Sharpe <rsharpe@samba.org>
Autobuild-User(master): Richard Sharpe <sharpe@samba.org>
Autobuild-Date(master): Mon Jun 27 00:01:55 CEST 2016 on sn-devel-144
Just a small typo fix where type and variable were flipped.
Signed-off-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Sat Jun 25 22:43:27 CEST 2016 on sn-devel-144
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Mon Jun 20 04:47:26 CEST 2016 on sn-devel-144
The GUID_from_ndr_blob() is pointless and costly
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Jun 17 18:13:56 CEST 2016 on sn-devel-144
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Mon Jun 13 14:11:11 CEST 2016 on sn-devel-144
There is closefrom in some BSDs, but Linux ships this only as part
of libbsd. Add a new implementation of it in libreplace. The one in
libbsd of jessie and upstream differ and it has for example optimizations
for FreeBSD, but it gets some of the array calculations slightly wrong
from my point of view. If you want those, use libbsd. This replacement
is optimized on Linux only looking at /proc/self/fd/, everything else
would do the OPEN_MAX brute force fallback.
Signed-off-by: Volker Lendecke <vl@samba.org>
