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The ndr token code keeps a temporary store of tokens which are
referred to a small number of times (often once) before being
discarded. The access patterns are somewhat stack-like, with recently
placed tokens being accessed most often.
The old code kept these tokens in a linked list, which we replace with
a self-resizing array.
This keeps everything roughly the same in big-O terms, but makes it
all faster in practice by vastly reducing the amount of tallocing and
pointer-chasing.
The peak memory use is strictly reduced. On a 64 bit machine each core
token struct fits in 16 bytes (after padding) while the two pointers
used by the DLIST add another 16 bytes, so the overall list allocation
is the same as the peak 2n array allocation -- except in the list case
it is dwarfed by the talloc and malloc metadata overhead.
Before settling on the resized arrays, we tried red-black trees, which
are bound to be better for large ndr structures. As it happens, we
don't deal with large structures (the size of replication clumps is
limited to 400 objects) and the asymptotic benefits of the trees are
not realised in practice.
With luck you should find graphs comparing the performance of these
various techniques at:
https://www.samba.org/~dbagnall/perf-tests/ndr-token/
This necessarily breaks the ABI because the linked list implementation
was publicly exposed.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Mar 2 08:38:22 CET 2017 on sn-devel-144
We were crashing earlier when calculating the length of NULL strings in
fixed size arrays (noticed while replying with an empty
spoolss_CorePrinterDriver struct within the spoolss_GetCorePrinterDrivers
call).
Guenther
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This allows processing of Windows Cabinet files (required for the MS-PAR
print protocol implementation)
Guenther
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This allows us to allocate only the correct size, not a default of 1024 bytes
per push.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This allows us to remove talloc() calls from GUID_from_ndr_blob().
To do this the struct ndr_pull is placed on the stack, and filled in there.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Switch values currently only have a peek variant, instead of a retrieve
variant for getting their values. This can create performance issues
with complex structures as the token list simply grows longer.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
From RFC 1035:
3.3.14. TXT RDATA format
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/ TXT-DATA /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
where:
TXT-DATA One or more <character-string>s.
TXT RRs are used to hold descriptive text. The semantics of the text
depends on the domain where it is found.
Each record contains an array of strings instead of just one string.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11128
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11686
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This is necessary because it has public headers.
Signed-off-by: Jelmer Vernooij <jelmer@jelmer.uk>
Reviewed-By: Andrew Bartlett <abartlet@samba.org>
Reviewed-By: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Jelmer Vernooij <jelmer@samba.org>
Autobuild-Date(master): Wed Jan 13 07:47:04 CET 2016 on sn-devel-144
'mdssvc' aka 'Metadata Search Service' is an RPC service used by Apple
for passing marshalled Spotlight search queries and results between
client to server.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
FSRVP server state must be retained persistently. This change adds IDL
definitions for the share map, shadow-copy and shadow-copy set types,
which will be used for marshalling and unmarshalling state alongside
database storage or retrieval.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is in preparation for adding NETWORK_INTERFACE_INFO Ioctl smbtorture test
case. This data structure is described in MS-SMB2 Sec. 2.2.32.5
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Anubhav Rakshit <anubhav.rakshit@gmail.com>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
This will make it easier in the future to NDR_PRINT a lease and
a lease key
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Jun 12 03:34:41 CEST 2014 on sn-devel-104
Change-Id: Iba3913d5a1c7f851b93f37e9beb6dbb20fbf7e55
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
See [MS-SWN] for the details.
Pair-Programmed-With: Gregor Beck <gbeck@sernet.de>
Signed-off-by: Gregor Beck <gbeck@sernet.de>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
This extracts the dcerpc_sec_verification_trailer from the end
of an ndr_pull structure, it found it reduces ndr->data_size.
NDR_ERR_ALLOC is the only possible error, all other errors
are ignored and a trailer with command count = 0 is returned.
Pair-Programmed-With: Gregor Beck <gbeck@sernet.de>
Signed-off-by: Gregor Beck <gbeck@sernet.de>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
See [MS-RPCE] 2.2.2.13 Verification Trailer for details.
Pair-Programmed-With: Gregor Beck <gbeck@sernet.de>
Signed-off-by: Gregor Beck <gbeck@sernet.de>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This is to create IDL-stored NFSv4 ACLs, just as we use for posix ACLs
to permit better testing.
Andrew Bartlett
Reviewed-by: Jeremy Allison <jra@samba.org>
This in turn causes an include of <net/if.h> to hang on some systems, as
/net/ means to run the automounter!
Andrew Bartlett
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Mon Oct 29 01:23:39 CET 2012 on sn-devel-104
This will allow us to marshall this into and from an NDR blob on disk, which will
allow us to fake up ACL support during make test, and to test the NT ACL emulation
using python bindings via the VFS.
Andrew Bartlett
there is a libsecurity on OSF1 which clasheѕ with our security lib. see bug #9023.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Björn Jacke <bj@sernet.de>
Autobuild-Date(master): Fri Aug 10 14:22:21 CEST 2012 on sn-devel-104
Windows returns multiple DNS_RPC_RECORDS structures, but there is
no well defined structure in [MS-DNSP] doc. Added hand-written
code to parse ndr.
Pair-Programmed-With: Andrew Tridgell <tridge@samba.org>
Signed-off-by: Andrew Tridgell <tridge@samba.org>
