Commit Graph

33 Commits

Author SHA1 Message Date
Tom Lane
4a235efdda Make configure check for minimum required version of IPC::Run.
Per the discussion around 3eb1f4d09, let's have configure verify that
the available IPC::Run version is at least 0.79, the agreed-on minimum.
It seems unlikely that this could bite anybody anymore, but it's useful
as documentation.  (Based on that, there's little need to back-patch.)

For consistency, also supply a minimum version for the other Perl
module we have an explicit check for, Time::HiRes.  I used the
version that ships with Perl 5.8.3.

Discussion: https://postgr.es/m/E1mYY6Z-0006OL-QN@gemulon.postgresql.org
2021-10-11 16:49:49 -04:00
Tom Lane
76fa3db336 Remove configure-time thread safety checking (thread_test.c).
This testing was useful when it was written, nigh twenty years ago,
but it seems fairly pointless for any platform built in the last
dozen or more years.  (Compare also the comments at 8a2121185.)
Also we now have reports that the test program itself fails under
ThreadSanitizer.  Rather than invest effort in fixing it, let's
just drop it, and assume that the few people who still care
already know they need to use --disable-thread-safety.

Back-patch into v14, for consistency with 8a2121185.

Discussion: https://postgr.es/m/CADhDkKzPSiNvA3Hyq+wSR_icuPmazG0cFe=YnC3U-CFcYLc8Xw@mail.gmail.com
2021-07-24 12:16:39 -04:00
Thomas Munro
5865e064ab Portability fixes for sigwait.
Build farm animals running ancient HPUX and Solaris have a non-standard
sigwait() from draft versions of POSIX, so they didn't like commit
7c09d279.  To avoid the problem in general, only try to use sigwait() if
it's declared by <signal.h> and matches the expected declaration.  To
select the modern declaration on Solaris (even in non-threaded
programs), move -D_POSIX_PTHREAD_SEMANTICS into the right place to
affect all translation units.

Also fix the error checking.  Modern sigwait() doesn't set errno.

Thanks to Tom Lane for help with this.

Discussion: https://postgr.es/m/3187588.1626136248%40sss.pgh.pa.us
2021-07-15 12:34:31 +12:00
Tom Lane
f014b1b9bb Probe for preadv/pwritev in a more macOS-friendly way.
Apple's mechanism for dealing with functions that are available
in only some OS versions confuses AC_CHECK_FUNCS, and therefore
AC_REPLACE_FUNCS.  We can use AC_CHECK_DECLS instead, so long as
we enable -Werror=unguarded-availability-new.  This allows people
compiling for macOS to control whether or not preadv/pwritev are
used by setting MACOSX_DEPLOYMENT_TARGET, rather than supplying
a back-rev SDK.  (Of course, the latter still works, too.)

James Hilliard

Discussion: https://postgr.es/m/20210122193230.25295-1-james.hilliard1@gmail.com
2021-07-12 19:17:35 -04:00
Tom Lane
9f6be2e79f Fix busted test for ldap_initialize.
Sigh ... I was expecting AC_CHECK_LIB to do something it didn't,
namely update LIBS.  This led to not finding ldap_initialize.
Fix by moving the probe for ldap_initialize.  In some sense this
is more correct anyway, since (at least for now) we care about
whether ldap_initialize exists in libldap not libldap_r.

Per buildfarm member elver and local testing.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-10 13:19:30 -04:00
Tom Lane
53c38a086a Un-break AIX build, take 2.
I incorrectly diagnosed the reason why hoverfly is unhappy.
Looking closer, it appears that it fails to link libldap
unless libssl is also present; so the problem was my
idea of clearing LIBS before making the check.  Revert
to essentially the original coding, except that instead
of failing when libldap_r isn't there, use libldap.

Per buildfarm member hoverfly.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-09 16:59:07 -04:00
Tom Lane
31e8cfac58 Un-break AIX build.
In commit d0a02bdb8, I'd supposed that uniformly probing for
ldap_bind would make the intent clearer.  However, that seems
not to work on AIX, for obscure reasons (maybe it's a macro
there?).  Revert to the former behavior of probing
ldap_simple_bind for thread-safe cases and ldap_bind otherwise.

Per buildfarm member hoverfly.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-09 14:15:41 -04:00
Tom Lane
d0a02bdb8c Update configure's probe for libldap to work with OpenLDAP 2.5.
The separate libldap_r is gone and libldap itself is now always
thread-safe.  Unfortunately there seems no easy way to tell by
inspection whether libldap is thread-safe, so we have to take
it on faith that libldap is thread-safe if there's no libldap_r.
That should be okay, as it appears that libldap_r was a standard
part of the installation going back at least 20 years.

Report and patch by Adrian Ho.  Back-patch to all supported
branches, since people might try to build any of them with
a newer OpenLDAP.

Discussion: https://postgr.es/m/17083-a19190d9591946a7@postgresql.org
2021-07-09 12:38:55 -04:00
Andrew Dunstan
596b5af1d3
Stamp HEAD as 15devel.
Let the hacking begin ...
2021-06-28 11:31:16 -04:00
Joe Conway
bafad2c5b2 Stamp 14beta2. 2021-06-21 17:07:55 -04:00
Tom Lane
e4f9737fac Stamp 14beta1. 2021-05-17 16:11:18 -04:00
Michael Paquier
e6bdfd9700 Refactor HMAC implementations
Similarly to the cryptohash implementations, this refactors the existing
HMAC code into a single set of APIs that can be plugged with any crypto
libraries PostgreSQL is built with (only OpenSSL currently).  If there
is no such libraries, a fallback implementation is available.  Those new
APIs are designed similarly to the existing cryptohash layer, so there
is no real new design here, with the same logic around buffer bound
checks and memory handling.

HMAC has a dependency on cryptohashes, so all the cryptohash types
supported by cryptohash{_openssl}.c can be used with HMAC.  This
refactoring is an advantage mainly for SCRAM, that included its own
implementation of HMAC with SHA256 without relying on the existing
crypto libraries even if PostgreSQL was built with their support.

This code has been tested on Windows and Linux, with and without
OpenSSL, across all the versions supported on HEAD from 1.1.1 down to
1.0.1.  I have also checked that the implementations are working fine
using some sample results, a custom extension of my own, and doing
cross-checks across different major versions with SCRAM with the client
and the backend.

Author: Michael Paquier
Reviewed-by: Bruce Momjian
Discussion: https://postgr.es/m/X9m0nkEJEzIPXjeZ@paquier.xyz
2021-04-03 17:30:49 +09:00
Tom Lane
2c75f8a612 Remove useless configure probe for <lz4/lz4.h>.
This seems to have been just copied-and-pasted from some other
header checks.  But our C code is entirely unprepared to support
such a header name, so it's only wasting cycles to look for it.
If we did need to support it, some #ifdefs would be required.

(A quick trawl at codesearch.debian.net finds some packages that
reference lz4/lz4.h; but they use *only* that spelling, and
appear to be intending to reference their own copy rather than
a system-level installation of liblz4.  There's no evidence of
freestanding installations that require this spelling.)

Discussion: https://postgr.es/m/457962.1616362509@sss.pgh.pa.us
2021-03-22 11:20:44 -04:00
Tom Lane
4d399a6fbe Bring configure support for LZ4 up to snuff.
It's not okay to just shove the pkg_config results right into our
build flags, for a couple different reasons:

* This fails to maintain the separation between CPPFLAGS and CFLAGS,
as well as that between LDFLAGS and LIBS.  (The CPPFLAGS angle is,
I believe, the reason for warning messages reported when building
with MacPorts' liblz4.)

* If pkg_config emits anything other than -I/-D/-L/-l switches,
it's highly unlikely that we want to absorb those.  That'd be more
likely to break the build than do anything helpful.  (Even the -D
case is questionable; but we're doing that for libxml2, so I kept it.)

Also, it's not okay to skip doing an AC_CHECK_LIB probe, as
evidenced by recent build failure on topminnow; that should
have been caught at configure time.

Model fixes for this on configure's libxml2 support.

It appears that somebody overlooked an autoheader run, too.

Discussion: https://postgr.es/m/20210119190720.GL8560@telsasoft.com
2021-03-21 17:20:17 -04:00
Thomas Munro
61752afb26 Provide recovery_init_sync_method=syncfs.
Since commit 2ce439f3 we have opened every file in the data directory
and called fsync() at the start of crash recovery.  This can be very
slow if there are many files, leading to field complaints of systems
taking minutes or even hours to begin crash recovery.

Provide an alternative method, for Linux only, where we call syncfs() on
every possibly different filesystem under the data directory.  This is
equivalent, but avoids faulting in potentially many inodes from
potentially slow storage.

The new mode comes with some caveats, described in the documentation, so
the default value for the new setting is "fsync", preserving the older
behavior.

Reported-by: Michael Brown <michael.brown@discourse.org>
Reviewed-by: Fujii Masao <masao.fujii@oss.nttdata.com>
Reviewed-by: Paul Guo <guopa@vmware.com>
Reviewed-by: Bruce Momjian <bruce@momjian.us>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: David Steele <david@pgmasters.net>
Discussion: https://postgr.es/m/11bc2bb7-ecb5-3ad0-b39f-df632734cd81%40discourse.org
Discussion: https://postgr.es/m/CAEET0ZHGnbXmi8yF3ywsDZvb3m9CbdsGZgfTXscQ6agcbzcZAw%40mail.gmail.com
2021-03-20 12:07:28 +13:00
Robert Haas
bbe0a81db6 Allow configurable LZ4 TOAST compression.
There is now a per-column COMPRESSION option which can be set to pglz
(the default, and the only option in up until now) or lz4. Or, if you
like, you can set the new default_toast_compression GUC to lz4, and
then that will be the default for new table columns for which no value
is specified. We don't have lz4 support in the PostgreSQL code, so
to use lz4 compression, PostgreSQL must be built --with-lz4.

In general, TOAST compression means compression of individual column
values, not the whole tuple, and those values can either be compressed
inline within the tuple or compressed and then stored externally in
the TOAST table, so those properties also apply to this feature.

Prior to this commit, a TOAST pointer has two unused bits as part of
the va_extsize field, and a compessed datum has two unused bits as
part of the va_rawsize field. These bits are unused because the length
of a varlena is limited to 1GB; we now use them to indicate the
compression type that was used. This means we only have bit space for
2 more built-in compresison types, but we could work around that
problem, if necessary, by introducing a new vartag_external value for
any further types we end up wanting to add. Hopefully, it won't be
too important to offer a wide selection of algorithms here, since
each one we add not only takes more coding but also adds a build
dependency for every packager. Nevertheless, it seems worth doing
at least this much, because LZ4 gets better compression than PGLZ
with less CPU usage.

It's possible for LZ4-compressed datums to leak into composite type
values stored on disk, just as it is for PGLZ. It's also possible for
LZ4-compressed attributes to be copied into a different table via SQL
commands such as CREATE TABLE AS or INSERT .. SELECT.  It would be
expensive to force such values to be decompressed, so PostgreSQL has
never done so. For the same reasons, we also don't force recompression
of already-compressed values even if the target table prefers a
different compression method than was used for the source data.  These
architectural decisions are perhaps arguable but revisiting them is
well beyond the scope of what seemed possible to do as part of this
project.  However, it's relatively cheap to recompress as part of
VACUUM FULL or CLUSTER, so this commit adjusts those commands to do
so, if the configured compression method of the table happens not to
match what was used for some column value stored therein.

Dilip Kumar. The original patches on which this work was based were
written by Ildus Kurbangaliev, and those were patches were based on
even earlier work by Nikita Glukhov, but the design has since changed
very substantially, since allow a potentially large number of
compression methods that could be added and dropped on a running
system proved too problematic given some of the architectural issues
mentioned above; the choice of which specific compression method to
add first is now different; and a lot of the code has been heavily
refactored.  More recently, Justin Przyby helped quite a bit with
testing and reviewing and this version also includes some code
contributions from him. Other design input and review from Tomas
Vondra, Álvaro Herrera, Andres Freund, Oleg Bartunov, Alexander
Korotkov, and me.

Discussion: http://postgr.es/m/20170907194236.4cefce96%40wp.localdomain
Discussion: http://postgr.es/m/CAFiTN-uUpX3ck%3DK0mLEk-G_kUQY%3DSNOTeqdaNRR9FMdQrHKebw%40mail.gmail.com
2021-03-19 15:10:38 -04:00
Thomas Munro
de91c3b976 Fix new pthread code to respect --disable-thread-safety.
Don't try to compile src/port/pthread_barrier_wait.c if we opted out of
threads at configure time.  Revealed by build farm member gaur, which
can't compile this code because of problems with its pthread
implementation.  It shouldn't be trying to, because it's using
--disable-thread-safety.

Defect in commit 44bf3d50.

Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/2568537.1615603606%40sss.pgh.pa.us
2021-03-13 17:21:41 +13:00
Thomas Munro
44bf3d5083 Add missing pthread_barrier_t.
Supply a simple implementation of the missing pthread_barrier_t type and
functions, for macOS.

Discussion: https://postgr.es/m/20200227180100.zyvjwzcpiokfsqm2%40alap3.anarazel.de
2021-03-10 17:44:04 +13:00
Michael Paquier
a899ec1cb2 Fix inconsistent configure data for --with-ssl
This inconsistency was showing up after an autoreconf.

Reported-by: Antonin Houska
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/47255.1613716807@antos
2021-02-20 10:17:10 +09:00
Michael Paquier
fe61df7f82 Introduce --with-ssl={openssl} as a configure option
This is a replacement for the existing --with-openssl, extending the
logic to make easier the addition of new SSL libraries.  The grammar is
chosen to be similar to --with-uuid, where multiple values can be
chosen, with "openssl" as the only supported value for now.

The original switch, --with-openssl, is kept for compatibility.

Author: Daniel Gustafsson, Michael Paquier
Reviewed-by: Jacob Champion
Discussion: https://postgr.es/m/FAB21FC8-0F62-434F-AA78-6BD9336D630A@yesql.se
2021-02-01 19:19:44 +09:00
Michael Paquier
a8ed6bb8f4 Introduce SHA1 implementations in the cryptohash infrastructure
With this commit, SHA1 goes through the implementation provided by
OpenSSL via EVP when building the backend with it, and uses as fallback
implementation KAME which was located in pgcrypto and already shaped for
an integration with a set of init, update and final routines.
Structures and routines have been renamed to make things consistent with
the fallback implementations of MD5 and SHA2.

uuid-ossp has used for ages a shortcut with pgcrypto to fetch a copy of
SHA1 if needed.  This was built depending on the build options within
./configure, so this cleans up some code and removes the build
dependency between pgcrypto and uuid-ossp.

Note that this will help with the refactoring of HMAC, as pgcrypto
offers the option to use MD5, SHA1 or SHA2, so only the second option
was missing to make that possible.

Author: Michael Paquier
Reviewed-by: Heikki Linnakangas
Discussion: https://postgr.es/m/X9HXKTgrvJvYO7Oh@paquier.xyz
2021-01-23 11:33:04 +09:00
Thomas Munro
0d56acfbaa Move our p{read,write}v replacements into their own files.
macOS's ranlib issued a warning about an empty pread.o file with the
previous arrangement, on systems new enough to require no replacement
functions.  Let's go back to using configure's AC_REPLACE_FUNCS system
to build and include each .o in the library only if it's needed, which
requires moving the *v() functions to their own files.

Also move the _with_retry() wrapper to a more permanent home.

Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/1283127.1610554395%40sss.pgh.pa.us
2021-01-14 11:16:59 +13:00
Thomas Munro
13a021f3e8 Provide pg_preadv() and pg_pwritev().
Provide synchronous vectored file I/O routines.  These map to preadv()
and pwritev(), with fallback implementations for systems that don't have
them.  Also provide a wrapper pg_pwritev_with_retry() that automatically
retries on short writes.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA%2BhUKGJA%2Bu-220VONeoREBXJ9P3S94Y7J%2BkqCnTYmahvZJwM%3Dg%40mail.gmail.com
2021-01-11 15:24:38 +13:00
Bruce Momjian
ca3b37487b Update copyright for 2021
Backpatch-through: 9.5
2021-01-02 13:06:25 -05:00
Tom Lane
7ca37fb040 Use setenv() in preference to putenv().
Since at least 2001 we've used putenv() and avoided setenv(), on the
grounds that the latter was unportable and not in POSIX.  However,
POSIX added it that same year, and by now the situation has reversed:
setenv() is probably more portable than putenv(), since POSIX now
treats the latter as not being a core function.  And setenv() has
cleaner semantics too.  So, let's reverse that old policy.

This commit adds a simple src/port/ implementation of setenv() for
any stragglers (we have one in the buildfarm, but I'd not be surprised
if that code is never used in the field).  More importantly, extend
win32env.c to also support setenv().  Then, replace usages of putenv()
with setenv(), and get rid of some ad-hoc implementations of setenv()
wannabees.

Also, adjust our src/port/ implementation of unsetenv() to follow the
POSIX spec that it returns an error indicator, rather than returning
void as per the ancient BSD convention.  I don't feel a need to make
all the call sites check for errors, but the portability stub ought
to match real-world practice.

Discussion: https://postgr.es/m/2065122.1609212051@sss.pgh.pa.us
2020-12-30 12:56:06 -05:00
Michael Paquier
525e60b742 Fix compilation of uuid-ossp
This module had a dependency on pgcrypto's md5.c that got removed by
b67b57a.  Instead of the code from pgcrypto, this code can just use the
new cryptohash routines for MD5 as a drop-in replacement, so let's just
do this switch.  This has also the merit to simplify a bit the
compilation of uuid-ossp.

This requires --with-uuid to be reproduced, and I have used e2fs as a
way to reproduce the failure, then test this commit.

Per reports from buildfarm members longfin, florican and sifaka.

Discussion: https://postgr.es/m/X9GToVd3QmWeNvj8@paquier.xyz
2020-12-10 12:49:43 +09:00
Tom Lane
4823c4f6ac Remove configure-time probe for DocBook DTD.
Checking for DocBook being installed was valuable when we were on the
OpenSP docs toolchain, because that was rather hard to get installed
fully.  Nowadays, as long as you have xmllint and xsltproc installed,
you're good, because those programs will fetch the DocBook files off
the net at need.  Moreover, testing this at configure time means that
a network access may well occur whether or not you have any interest
in building the docs later.  That can be slow (typically 2 or 3
seconds, though much higher delays have been reported), and it seems
not very nice to be doing an off-machine access without warning, too.

Hence, drop the PGAC_CHECK_DOCBOOK probe, and adjust related
documentation.  Without that macro, there's not much left of
config/docbook.m4 at all, so I just removed it.

Back-patch to v11, where we started to use xmllint in the
PGAC_CHECK_DOCBOOK probe.

Discussion: https://postgr.es/m/E2EE6B76-2D96-408A-B961-CAE47D1A86F0@yesql.se
Discussion: https://postgr.es/m/A55A7FC9-FA60-47FE-98B5-139CDC57CE6E@gmail.com
2020-11-30 15:24:13 -05:00
Magnus Hagander
16f96c74d4 Remove ability to independently select random number generator
Remove the ability to select random number generator independently from
SSL library. Instead, use the random number generator from the SSL
library (today only OpenSSL supported) if one is configured. If no SSL
library is configured, use the platform default (which means use
CryptoAPI on Win32 and /dev/urandom on Linux).

This also restructures pg_strong_random.c to have three clearly separate
sections, one for each implementation, with two functions in each,
instead of a scattered set of ifdefs throughout the whole file.

Author: Daniel Gustafsson, Magnus Hagander, Michael Paquier
Discussion: https://postgr.es/m/632623.1605460616@sss.pgh.pa.us
2020-11-20 13:57:33 +01:00
Tom Lane
49407dc32a On macOS, use -isysroot in link steps as well as compile steps.
We previously put the -isysroot switch only into CPPFLAGS, theorizing
that it was only needed to find the right copies of include files.
However, it seems that we also need to use it while linking programs,
to find the right stub ".tbd" files for libraries.  We got away
without that up to now, but apparently that was mostly luck.  It may
also be that failures are only observed when the Xcode version is
noticeably out of sync with the host macOS version; the case that's
prompting action right now is that builds fail when using latest Xcode
(12.2) on macOS Catalina, even though it's fine on Big Sur.

Hence, add -isysroot to LDFLAGS as well.  (It seems that the more
common practice is to put it in CFLAGS, whence it'd be included at
both compile and link steps.  However, we can't mess with CFLAGS in
the platform template file without confusing configure's logic for
choosing default CFLAGS.)

This should be back-patched, but first let's see if the buildfarm
likes it on HEAD.

Report and patch by James Hilliard (some cosmetic mods by me)

Discussion: https://postgr.es/m/20201120003314.20560-1-james.hilliard1@gmail.com
2020-11-20 00:07:09 -05:00
Tom Lane
8a2121185b Remove the option to build thread_test.c outside configure.
Theoretically one could go into src/test/thread and build/run this
program there.  In practice, that hasn't worked since 96bf88d52,
and probably much longer on some platforms (likely including just
the sort of hoary leftovers where this test might be of interest).
While it wouldn't be too hard to repair the breakage, the fact that
nobody has noticed for two years shows that there is zero usefulness
in maintaining this build pathway.  Let's get rid of it and decree
that thread_test.c is *only* meant to be built/used in configure.

Given that decision, it makes sense to put thread_test.c under config/
and get rid of src/test/thread altogether, so that's what I did.

In passing, update src/test/README, which had been ignored by some
not-so-recent additions of subdirectories.

Discussion: https://postgr.es/m/227659.1603041612@sss.pgh.pa.us
2020-10-21 12:08:48 -04:00
Tom Lane
bed90759fc Fix our Windows stat() emulation to handle file sizes > 4GB.
Hack things so that our idea of "struct stat" is equivalent to Windows'
struct __stat64, allowing it to have a wide enough st_size field.

Instead of relying on native stat(), use GetFileInformationByHandle().
This avoids a number of issues with Microsoft's multiple and rather
slipshod emulations of stat().  We still need to jump through hoops
to deal with ERROR_DELETE_PENDING, though :-(

Pull the relevant support code out of dirmod.c and put it into
its own file, win32stat.c.

Still TODO: do we need to do something different with lstat(),
rather than treating it identically to stat()?

Juan José Santamaría Flecha, reviewed by Emil Iggland;
based on prior work by Michael Paquier, Sergey Zubkovsky, and others

Discussion: https://postgr.es/m/1803D792815FC24D871C00D17AE95905CF5099@g01jpexmbkw24
Discussion: https://postgr.es/m/15858-9572469fd3b73263@postgresql.org
2020-10-09 16:20:12 -04:00
Tom Lane
695de5d1ed Split Makefile symbol CFLAGS_VECTOR into two symbols.
Replace CFLAGS_VECTOR with CFLAGS_UNROLL_LOOPS and CFLAGS_VECTORIZE,
allowing us to distinguish whether we want to apply -funroll-loops,
-ftree-vectorize, or both to a particular source file.  Up to now
the only consumer of the symbol has been checksum.c which wants
both, so that there was no need to distinguish; but that's about
to change.

Amit Khandekar, reviewed and edited a little by me

Discussion: https://postgr.es/m/CAJ3gD9evtA_vBo+WMYMyT-u=keHX7-r8p2w7OSRfXf42LTwCZQ@mail.gmail.com
2020-09-06 21:28:16 -04:00
Peter Eisentraut
25244b8972 Rename configure.in to configure.ac
The new name has been preferred by Autoconf for a long time.  Future
versions of Autoconf will warn about the old name.

Discussion: https://www.postgresql.org/message-id/flat/e796c185-5ece-8569-248f-dd3799701be1%402ndquadrant.com
2020-07-24 10:42:08 +02:00