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PostgreSQL 11 introduces configurable WAL segment sizes, from 1MB to 1GB. There are two areas that needed to be updated to support this: building the archive-get queue and checking that WAL has been archived after a backup. Both operations require the WAL segment size to properly build a list. Checking the archive after a backup is still implemented in Perl and has an active database connection, so just get the WAL segment size from the database. The archive-get command does not have a connection to the database, so get the WAL segment size from pg_control instead. This requires a deeper inspection of pg_control than has been done in the past, so it seemed best to copy the relevant data structures from each version of PostgreSQL and build a generic interface layer to address them. While this approach is a bit verbose, it has the advantage of being relatively simple, and can easily be updated for new versions of PostgreSQL. Since the integration tests generate pg_control files for testing, teach Perl how to generate files with the correct offsets for both 32-bit and 64-bit architectures.
86 lines
3.6 KiB
C
86 lines
3.6 KiB
C
/***********************************************************************************************************************************
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PostgreSQL 10 Interface
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***********************************************************************************************************************************/
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#include "common/debug.h"
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#include "common/log.h"
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#include "postgres/interface/v100.h"
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/***********************************************************************************************************************************
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Include PostgreSQL Types
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***********************************************************************************************************************************/
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#include "postgres/interface/v100.auto.c"
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/***********************************************************************************************************************************
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Is the control file for this version of PostgreSQL?
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***********************************************************************************************************************************/
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bool
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pgInterfaceIs100(const Buffer *controlFile)
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{
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FUNCTION_TEST_BEGIN();
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FUNCTION_TEST_PARAM(BUFFER, controlFile);
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FUNCTION_TEST_ASSERT(controlFile != NULL);
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FUNCTION_TEST_END();
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ControlFileData *controlData = (ControlFileData *)bufPtr(controlFile);
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FUNCTION_TEST_RESULT(
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BOOL, controlData->pg_control_version == PG_CONTROL_VERSION && controlData->catalog_version_no == CATALOG_VERSION_NO);
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}
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/***********************************************************************************************************************************
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Get information from pg_control in a common format
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***********************************************************************************************************************************/
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PgControl
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pgInterfaceControl100(const Buffer *controlFile)
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{
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FUNCTION_DEBUG_BEGIN(logLevelTrace);
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FUNCTION_DEBUG_PARAM(BUFFER, controlFile);
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FUNCTION_TEST_ASSERT(controlFile != NULL);
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FUNCTION_TEST_ASSERT(pgInterfaceIs100(controlFile));
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FUNCTION_DEBUG_END();
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PgControl result = {0};
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ControlFileData *controlData = (ControlFileData *)bufPtr(controlFile);
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result.systemId = controlData->system_identifier;
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result.controlVersion = controlData->pg_control_version;
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result.catalogVersion = controlData->catalog_version_no;
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result.pageSize = controlData->blcksz;
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result.walSegmentSize = controlData->xlog_seg_size;
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result.pageChecksum = controlData->data_checksum_version != 0;
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FUNCTION_DEBUG_RESULT(PG_CONTROL, result);
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}
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/***********************************************************************************************************************************
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Create pg_control for testing
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***********************************************************************************************************************************/
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#ifdef DEBUG
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void
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pgInterfaceControlTest100(PgControl pgControl, Buffer *buffer)
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{
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FUNCTION_TEST_BEGIN();
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FUNCTION_TEST_PARAM(PG_CONTROL, pgControl);
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FUNCTION_TEST_END();
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ControlFileData *controlData = (ControlFileData *)bufPtr(buffer);
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controlData->system_identifier = pgControl.systemId;
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controlData->pg_control_version = pgControl.controlVersion == 0 ? PG_CONTROL_VERSION : pgControl.controlVersion;
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controlData->catalog_version_no = pgControl.catalogVersion == 0 ? CATALOG_VERSION_NO : pgControl.catalogVersion;
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controlData->blcksz = pgControl.pageSize;
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controlData->xlog_seg_size = pgControl.walSegmentSize;
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controlData->data_checksum_version = pgControl.pageChecksum;
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FUNCTION_TEST_RESULT_VOID();
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}
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#endif
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