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[PATCH 07/10] add wal_compression_method: zstd 4+ messages / 3 participants [nested] [flat]
* [PATCH 07/10] add wal_compression_method: zstd @ 2021-03-12 20:43 Justin Pryzby <[email protected]> 0 siblings, 0 replies; 4+ messages in thread From: Justin Pryzby @ 2021-03-12 20:43 UTC (permalink / raw) --- configure | 163 ++++++++++++++++++ configure.ac | 26 +++ doc/src/sgml/config.sgml | 2 +- src/backend/access/transam/xlog.c | 3 + src/backend/access/transam/xloginsert.c | 18 +- src/backend/access/transam/xlogreader.c | 15 ++ src/backend/utils/misc/postgresql.conf.sample | 2 +- src/include/access/xlog_internal.h | 1 + src/include/pg_config.h.in | 3 + src/tools/msvc/Solution.pm | 1 + 10 files changed, 231 insertions(+), 3 deletions(-) diff --git a/configure b/configure index 8d76be00c1..81e23418b2 100755 --- a/configure +++ b/configure @@ -699,6 +699,9 @@ with_gnu_ld LD LDFLAGS_SL LDFLAGS_EX +ZSTD_LIBS +ZSTD_CFLAGS +with_zstd LZ4_LIBS LZ4_CFLAGS with_lz4 @@ -868,6 +871,7 @@ with_libxslt with_system_tzdata with_zlib with_lz4 +with_zstd with_gnu_ld with_ssl with_openssl @@ -897,6 +901,8 @@ XML2_CFLAGS XML2_LIBS LZ4_CFLAGS LZ4_LIBS +ZSTD_CFLAGS +ZSTD_LIBS LDFLAGS_EX LDFLAGS_SL PERL @@ -1576,6 +1582,7 @@ Optional Packages: use system time zone data in DIR --without-zlib do not use Zlib --without-lz4 build without LZ4 support + --with-zstd build with Zstd compression library --with-gnu-ld assume the C compiler uses GNU ld [default=no] --with-ssl=LIB use LIB for SSL/TLS support (openssl) --with-openssl obsolete spelling of --with-ssl=openssl @@ -1605,6 +1612,8 @@ Some influential environment variables: XML2_LIBS linker flags for XML2, overriding pkg-config LZ4_CFLAGS C compiler flags for LZ4, overriding pkg-config LZ4_LIBS linker flags for LZ4, overriding pkg-config + ZSTD_CFLAGS C compiler flags for ZSTD, overriding pkg-config + ZSTD_LIBS linker flags for ZSTD, overriding pkg-config LDFLAGS_EX extra linker flags for linking executables only LDFLAGS_SL extra linker flags for linking shared libraries only PERL Perl program @@ -8705,6 +8714,137 @@ fi CFLAGS="$LZ4_CFLAGS $CFLAGS" fi +# +# ZSTD +# +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build with zstd support" >&5 +$as_echo_n "checking whether to build with zstd support... " >&6; } + + + +# Check whether --with-zstd was given. +if test "${with_zstd+set}" = set; then : + withval=$with_zstd; + case $withval in + yes) + +$as_echo "#define USE_ZSTD 1" >>confdefs.h + + ;; + no) + : + ;; + *) + as_fn_error $? "no argument expected for --with-zstd option" "$LINENO" 5 + ;; + esac + +else + with_zstd=no + +fi + + +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_zstd" >&5 +$as_echo "$with_zstd" >&6; } + + +if test "$with_zstd" = yes; then + +pkg_failed=no +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libzstd" >&5 +$as_echo_n "checking for libzstd... " >&6; } + +if test -n "$ZSTD_CFLAGS"; then + pkg_cv_ZSTD_CFLAGS="$ZSTD_CFLAGS" + elif test -n "$PKG_CONFIG"; then + if test -n "$PKG_CONFIG" && \ + { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libzstd\""; } >&5 + ($PKG_CONFIG --exists --print-errors "libzstd") 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + pkg_cv_ZSTD_CFLAGS=`$PKG_CONFIG --cflags "libzstd" 2>/dev/null` + test "x$?" != "x0" && pkg_failed=yes +else + pkg_failed=yes +fi + else + pkg_failed=untried +fi +if test -n "$ZSTD_LIBS"; then + pkg_cv_ZSTD_LIBS="$ZSTD_LIBS" + elif test -n "$PKG_CONFIG"; then + if test -n "$PKG_CONFIG" && \ + { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libzstd\""; } >&5 + ($PKG_CONFIG --exists --print-errors "libzstd") 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; then + pkg_cv_ZSTD_LIBS=`$PKG_CONFIG --libs "libzstd" 2>/dev/null` + test "x$?" != "x0" && pkg_failed=yes +else + pkg_failed=yes +fi + else + pkg_failed=untried +fi + + + +if test $pkg_failed = yes; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + +if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then + _pkg_short_errors_supported=yes +else + _pkg_short_errors_supported=no +fi + if test $_pkg_short_errors_supported = yes; then + ZSTD_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libzstd" 2>&1` + else + ZSTD_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libzstd" 2>&1` + fi + # Put the nasty error message in config.log where it belongs + echo "$ZSTD_PKG_ERRORS" >&5 + + as_fn_error $? "Package requirements (libzstd) were not met: + +$ZSTD_PKG_ERRORS + +Consider adjusting the PKG_CONFIG_PATH environment variable if you +installed software in a non-standard prefix. + +Alternatively, you may set the environment variables ZSTD_CFLAGS +and ZSTD_LIBS to avoid the need to call pkg-config. +See the pkg-config man page for more details." "$LINENO" 5 +elif test $pkg_failed = untried; then + { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 +$as_echo "no" >&6; } + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "The pkg-config script could not be found or is too old. Make sure it +is in your PATH or set the PKG_CONFIG environment variable to the full +path to pkg-config. + +Alternatively, you may set the environment variables ZSTD_CFLAGS +and ZSTD_LIBS to avoid the need to call pkg-config. +See the pkg-config man page for more details. + +To get pkg-config, see <http://pkg-config.freedesktop.org/;. +See \`config.log' for more details" "$LINENO" 5; } +else + ZSTD_CFLAGS=$pkg_cv_ZSTD_CFLAGS + ZSTD_LIBS=$pkg_cv_ZSTD_LIBS + { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 +$as_echo "yes" >&6; } + +fi + LIBS="$ZSTD_LIBS $LIBS" + CFLAGS="$ZSTD_CFLAGS $CFLAGS" +fi + # # Assignments # @@ -13559,6 +13699,29 @@ done CPPFLAGS=$ac_save_CPPFLAGS fi +if test "$with_zstd" = yes; then + ac_save_CPPFLAGS=$CPPFLAGS + CPPFLAGS="$ZSTD_CFLAGS $CPPFLAGS" + + # Verify we have zstd's header files + for ac_header in zstd.h +do : + ac_fn_c_check_header_mongrel "$LINENO" "zstd.h" "ac_cv_header_zstd_h" "$ac_includes_default" +if test "x$ac_cv_header_zstd_h" = xyes; then : + cat >>confdefs.h <<_ACEOF +#define HAVE_ZSTD_H 1 +_ACEOF + +else + as_fn_error $? "zstd.h header file is required for zstd" "$LINENO" 5 +fi + +done + + + CPPFLAGS=$ac_save_CPPFLAGS +fi + if test "$with_gssapi" = yes ; then for ac_header in gssapi/gssapi.h do : diff --git a/configure.ac b/configure.ac index bfcdc88be0..d6f6349067 100644 --- a/configure.ac +++ b/configure.ac @@ -1001,6 +1001,21 @@ if test "$with_lz4" = yes; then CFLAGS="$LZ4_CFLAGS $CFLAGS" fi +# +# ZSTD +# +AC_MSG_CHECKING([whether to build with zstd support]) +PGAC_ARG_BOOL(with, zstd, no, [build with Zstd compression library], + [AC_DEFINE([USE_ZSTD], 1, [Define to 1 to build with zstd support. (--with-zstd)])]) +AC_MSG_RESULT([$with_zstd]) +AC_SUBST(with_zstd) + +if test "$with_zstd" = yes; then + PKG_CHECK_MODULES(ZSTD, libzstd) + LIBS="$ZSTD_LIBS $LIBS" + CFLAGS="$ZSTD_CFLAGS $CFLAGS" +fi + # # Assignments # @@ -1436,6 +1451,17 @@ if test "$with_lz4" = yes; then CPPFLAGS=$ac_save_CPPFLAGS fi +if test "$with_zstd" = yes; then + ac_save_CPPFLAGS=$CPPFLAGS + CPPFLAGS="$ZSTD_CFLAGS $CPPFLAGS" + + # Verify we have zstd's header files + AC_CHECK_HEADERS(zstd.h, [], + [AC_MSG_ERROR([zstd.h header file is required for zstd])]) + + CPPFLAGS=$ac_save_CPPFLAGS +fi + if test "$with_gssapi" = yes ; then AC_CHECK_HEADERS(gssapi/gssapi.h, [], [AC_CHECK_HEADERS(gssapi.h, [], [AC_MSG_ERROR([gssapi.h header file is required for GSSAPI])])]) diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 257775c83b..94dd6ef3e9 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -3083,7 +3083,7 @@ include_dir 'conf.d' This parameter selects the compression method used to compress WAL when <varname>wal_compression</varname> is enabled. The supported methods are pglz, zlib, and (if configured when - <productname>PostgreSQL</productname> was built) lz4. + <productname>PostgreSQL</productname> was built) lz4 and zstd. The default value is <literal>pglz</literal>. Only superusers can change this setting. </para> diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index 3657f74de9..307eee6626 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -189,6 +189,9 @@ const struct config_enum_entry wal_compression_options[] = { #endif #ifdef USE_LZ4 {"lz4", WAL_COMPRESSION_LZ4, false}, +#endif +#ifdef USE_ZSTD + {"zstd", WAL_COMPRESSION_ZSTD, false}, #endif {NULL, 0, false} }; diff --git a/src/backend/access/transam/xloginsert.c b/src/backend/access/transam/xloginsert.c index 3c15286bd8..4591e476c6 100644 --- a/src/backend/access/transam/xloginsert.c +++ b/src/backend/access/transam/xloginsert.c @@ -48,10 +48,17 @@ #define LZ4_MAX_BLCKSZ 0 #endif +#ifdef USE_ZSTD +#include "zstd.h" +#define ZSTD_MAX_BLCKSZ ZSTD_COMPRESSBOUND(BLCKSZ) +#else +#define ZSTD_MAX_BLCKSZ 0 +#endif + /* Buffer size required to store a compressed version of backup block image */ #define PGLZ_MAX_BLCKSZ PGLZ_MAX_OUTPUT(BLCKSZ) -#define COMPRESS_BUFSIZE Max(Max(PGLZ_MAX_BLCKSZ, ZLIB_MAX_BLCKSZ), LZ4_MAX_BLCKSZ) +#define COMPRESS_BUFSIZE Max(Max(Max(PGLZ_MAX_BLCKSZ, ZLIB_MAX_BLCKSZ), LZ4_MAX_BLCKSZ), ZSTD_MAX_BLCKSZ) /* * For each block reference registered with XLogRegisterBuffer, we fill in @@ -906,6 +913,15 @@ XLogCompressBackupBlock(char *page, uint16 hole_offset, uint16 hole_length, break; #endif +#ifdef USE_ZSTD + case WAL_COMPRESSION_ZSTD: + len = ZSTD_compress(dest, COMPRESS_BUFSIZE, source, orig_len, + ZSTD_CLEVEL_DEFAULT); + if (ZSTD_isError(len)) + len = -1; + break; +#endif + default: /* * It should be impossible to get here for unsupported algorithms, diff --git a/src/backend/access/transam/xlogreader.c b/src/backend/access/transam/xlogreader.c index 97165f1bb1..0f9d522087 100644 --- a/src/backend/access/transam/xlogreader.c +++ b/src/backend/access/transam/xlogreader.c @@ -41,6 +41,10 @@ #include "lz4.h" #endif +#ifdef USE_ZSTD +#include "zstd.h" +#endif + static void report_invalid_record(XLogReaderState *state, const char *fmt,...) pg_attribute_printf(2, 3); static bool allocate_recordbuf(XLogReaderState *state, uint32 reclength); @@ -1549,6 +1553,7 @@ struct walcompression walmethods[] = { {"pglz", WAL_COMPRESSION_PGLZ}, {"zlib", WAL_COMPRESSION_ZLIB}, {"lz4", WAL_COMPRESSION_LZ4}, + {"zstd", WAL_COMPRESSION_ZSTD}, }; /* @@ -1621,6 +1626,16 @@ RestoreBlockImage(XLogReaderState *record, uint8 block_id, char *page) break; #endif +#ifdef USE_ZSTD + case WAL_COMPRESSION_ZSTD: + decomp_result = ZSTD_decompress(tmp.data, BLCKSZ-bkpb->hole_length, + ptr, bkpb->bimg_len); + // XXX: ZSTD_getErrorName + if (ZSTD_isError(decomp_result)) + decomp_result = -1; + break; +#endif + default: report_invalid_record(record, "image at %X/%X is compressed with unsupported codec, block %d (%d/%s)", (uint32) (record->ReadRecPtr >> 32), diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample index 76f494cb9b..d372e2a817 100644 --- a/src/backend/utils/misc/postgresql.conf.sample +++ b/src/backend/utils/misc/postgresql.conf.sample @@ -213,7 +213,7 @@ # open_sync #full_page_writes = on # recover from partial page writes #wal_compression = off # enable compression of full-page writes -#wal_compression_method = pglz # pglz, zlib, lz4 +#wal_compression_method = pglz # pglz, zlib, lz4, zstd #wal_log_hints = off # also do full page writes of non-critical updates # (change requires restart) #wal_init_zero = on # zero-fill new WAL files diff --git a/src/include/access/xlog_internal.h b/src/include/access/xlog_internal.h index b908fa48de..fa8146645d 100644 --- a/src/include/access/xlog_internal.h +++ b/src/include/access/xlog_internal.h @@ -337,6 +337,7 @@ typedef enum WalCompression WAL_COMPRESSION_PGLZ, WAL_COMPRESSION_ZLIB, WAL_COMPRESSION_LZ4, + WAL_COMPRESSION_ZSTD, } WalCompression; extern const char *wal_compression_name(WalCompression compression); diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in index 0a6422da4f..ad26393352 100644 --- a/src/include/pg_config.h.in +++ b/src/include/pg_config.h.in @@ -902,6 +902,9 @@ /* Define to 1 to build with LZ4 support (--with-lz4) */ #undef USE_LZ4 +/* Define to 1 if you have the `zstd' library (-lzstd). */ +#undef USE_ZSTD + /* Define to select named POSIX semaphores. */ #undef USE_NAMED_POSIX_SEMAPHORES diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm index 14605371bb..fff0212087 100644 --- a/src/tools/msvc/Solution.pm +++ b/src/tools/msvc/Solution.pm @@ -486,6 +486,7 @@ sub GenerateFiles USE_LIBXML => undef, USE_LIBXSLT => undef, USE_LZ4 => undef, + USE_ZSTD => $self->{options}->{zstd} ? 1 : undef, USE_LDAP => $self->{options}->{ldap} ? 1 : undef, USE_LLVM => undef, USE_NAMED_POSIX_SEMAPHORES => undef, -- 2.17.0 --jozmn01XJZjDjM3N Content-Type: text/x-diff; charset=us-ascii Content-Disposition: attachment; filename="0008-Default-to-zstd.patch" ^ permalink raw reply [nested|flat] 4+ messages in thread
* Remove AUTH_REQ_KRB4 and AUTH_REQ_KRB5 in libpq code @ 2023-03-19 22:20 Michael Paquier <[email protected]> 0 siblings, 1 reply; 4+ messages in thread From: Michael Paquier @ 2023-03-19 22:20 UTC (permalink / raw) To: Postgres hackers <[email protected]> Hi all, $subject has been discussed here, still seems worth its own thread for clarity: https://www.postgresql.org/message-id/[email protected] Support for Kerberos v4 has been removed in a159ad3 (2005) and the same happened for v5 in 98de86e (2014, meaning that this is still possible with 9.2 and 9.3 backends). Anyway, the attached seems worth the simplifications now? This includes a cleanup of protocol.sgml. Thoughts? -- Michael Attachments: [text/x-diff] libpq-krb-cleanup.patch (3.4K, ../../ZBeKv%2FaCUV%[email protected]/2-libpq-krb-cleanup.patch) download | inline diff: diff --git a/src/include/libpq/pqcomm.h b/src/include/libpq/pqcomm.h index bff7dd18a2..8251639cd3 100644 --- a/src/include/libpq/pqcomm.h +++ b/src/include/libpq/pqcomm.h @@ -111,8 +111,8 @@ extern PGDLLIMPORT bool Db_user_namespace; /* These are the authentication request codes sent by the backend. */ #define AUTH_REQ_OK 0 /* User is authenticated */ -#define AUTH_REQ_KRB4 1 /* Kerberos V4. Not supported any more. */ -#define AUTH_REQ_KRB5 2 /* Kerberos V5. Not supported any more. */ +/* 1 is available. It was used for Kerberos V4, not supported any more */ +/* 2 is available. It was used for Kerberos V5, not supported any more */ #define AUTH_REQ_PASSWORD 3 /* Password */ #define AUTH_REQ_CRYPT 4 /* crypt password. Not supported any more. */ #define AUTH_REQ_MD5 5 /* md5 password */ diff --git a/src/interfaces/libpq/fe-auth.c b/src/interfaces/libpq/fe-auth.c index fa95f8e6e9..1ce0794f89 100644 --- a/src/interfaces/libpq/fe-auth.c +++ b/src/interfaces/libpq/fe-auth.c @@ -942,14 +942,6 @@ pg_fe_sendauth(AuthRequest areq, int payloadlen, PGconn *conn) case AUTH_REQ_OK: break; - case AUTH_REQ_KRB4: - libpq_append_conn_error(conn, "Kerberos 4 authentication not supported"); - return STATUS_ERROR; - - case AUTH_REQ_KRB5: - libpq_append_conn_error(conn, "Kerberos 5 authentication not supported"); - return STATUS_ERROR; - #if defined(ENABLE_GSS) || defined(ENABLE_SSPI) case AUTH_REQ_GSS: #if !defined(ENABLE_SSPI) diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml index 8b5e7b1ad7..ed7a3ceda1 100644 --- a/doc/src/sgml/protocol.sgml +++ b/doc/src/sgml/protocol.sgml @@ -271,20 +271,6 @@ </listitem> </varlistentry> - <varlistentry> - <term>AuthenticationKerberosV5</term> - <listitem> - <para> - The frontend must now take part in a Kerberos V5 - authentication dialog (not described here, part of the - Kerberos specification) with the server. If this is - successful, the server responds with an AuthenticationOk, - otherwise it responds with an ErrorResponse. This is no - longer supported. - </para> - </listitem> - </varlistentry> - <varlistentry> <term>AuthenticationCleartextPassword</term> <listitem> @@ -3318,41 +3304,6 @@ psql "dbname=postgres replication=database" -c "IDENTIFY_SYSTEM;" </listitem> </varlistentry> - <varlistentry id="protocol-message-formats-AuthenticationKerberosV5"> - <term>AuthenticationKerberosV5 (B)</term> - <listitem> - - <variablelist> - <varlistentry> - <term>Byte1('R')</term> - <listitem> - <para> - Identifies the message as an authentication request. - </para> - </listitem> - </varlistentry> - - <varlistentry> - <term>Int32(8)</term> - <listitem> - <para> - Length of message contents in bytes, including self. - </para> - </listitem> - </varlistentry> - - <varlistentry> - <term>Int32(2)</term> - <listitem> - <para> - Specifies that Kerberos V5 authentication is required. - </para> - </listitem> - </varlistentry> - </variablelist> - </listitem> - </varlistentry> - <varlistentry id="protocol-message-formats-AuthenticationCleartextPassword"> <term>AuthenticationCleartextPassword (B)</term> <listitem> [application/pgp-signature] signature.asc (833B, ../../ZBeKv%2FaCUV%[email protected]/3-signature.asc) download ^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Remove AUTH_REQ_KRB4 and AUTH_REQ_KRB5 in libpq code @ 2023-03-19 22:53 Tom Lane <[email protected]> parent: Michael Paquier <[email protected]> 0 siblings, 1 reply; 4+ messages in thread From: Tom Lane @ 2023-03-19 22:53 UTC (permalink / raw) To: Michael Paquier <[email protected]>; +Cc: Postgres hackers <[email protected]> Michael Paquier <[email protected]> writes: > $subject has been discussed here, still seems worth its own thread for > clarity: > https://www.postgresql.org/message-id/[email protected] > Support for Kerberos v4 has been removed in a159ad3 (2005) and the > same happened for v5 in 98de86e (2014, meaning that this is still > possible with 9.2 and 9.3 backends). Anyway, the attached seems worth > the simplifications now? This includes a cleanup of protocol.sgml. 9.2 is still within our "supported old versions" window, so it's at least plausible that somebody would hit this for KRB5. Still, the net effect would be that they'd get "authentication method 2 not supported" instead of "Kerberos 5 authentication not supported". I lean (weakly) to the idea that it's no longer worth the translation maintenance effort to keep the special message. A compromise could be to drop KRB4 but keep the KRB5 case for awhile yet. One other thought is that I don't really like these comments implying that recycling these AUTH_REQ codes might be a good thing to do: +/* 1 is available. It was used for Kerberos V4, not supported any more */ I think we'd be better off treating them as permanently retired. It's not like there's any shortage of code space to worry about. More, there might be other implementations of our wire protocol that still have support for these codes, so that re-using them could cause compatibility issues. So maybe write "reserved" instead of "available"? regards, tom lane ^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Remove AUTH_REQ_KRB4 and AUTH_REQ_KRB5 in libpq code @ 2023-03-19 23:48 Michael Paquier <[email protected]> parent: Tom Lane <[email protected]> 0 siblings, 0 replies; 4+ messages in thread From: Michael Paquier @ 2023-03-19 23:48 UTC (permalink / raw) To: Tom Lane <[email protected]>; +Cc: Postgres hackers <[email protected]> On Sun, Mar 19, 2023 at 06:53:28PM -0400, Tom Lane wrote: > 9.2 is still within our "supported old versions" window, so it's > at least plausible that somebody would hit this for KRB5. Still, > the net effect would be that they'd get "authentication method 2 > not supported" instead of "Kerberos 5 authentication not supported". > I lean (weakly) to the idea that it's no longer worth the translation > maintenance effort to keep the special message. > > A compromise could be to drop KRB4 but keep the KRB5 case for > awhile yet. Hmm. I think that I would still drop both of them at the end, even in v16 but I won't fight hard on that, either. The only difference is the verbosity of the error string generated, and there is still a trace of what the code numbers were in pqcomm.h. > One other thought is that I don't really like these comments > implying that recycling these AUTH_REQ codes might be a good > thing to do: > > +/* 1 is available. It was used for Kerberos V4, not supported any more */ > > I think we'd be better off treating them as permanently retired. > It's not like there's any shortage of code space to worry about. > More, there might be other implementations of our wire protocol > that still have support for these codes, so that re-using them > could cause compatibility issues. So maybe write "reserved" > instead of "available"? Okay, fine by me. -- Michael Attachments: [application/pgp-signature] signature.asc (833B, ../../[email protected]/2-signature.asc) download ^ permalink raw reply [nested|flat] 4+ messages in thread
end of thread, other threads:[~2023-03-19 23:48 UTC | newest] Thread overview: 4+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2021-03-12 20:43 [PATCH 07/10] add wal_compression_method: zstd Justin Pryzby <[email protected]> 2023-03-19 22:20 Remove AUTH_REQ_KRB4 and AUTH_REQ_KRB5 in libpq code Michael Paquier <[email protected]> 2023-03-19 22:53 ` Re: Remove AUTH_REQ_KRB4 and AUTH_REQ_KRB5 in libpq code Tom Lane <[email protected]> 2023-03-19 23:48 ` Re: Remove AUTH_REQ_KRB4 and AUTH_REQ_KRB5 in libpq code Michael Paquier <[email protected]>
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