#include "access/rmgr.h"
#include "access/xlogdefs.h"
#include "storage/block.h"
#include "storage/buf.h"
#include "storage/bufpage.h"
#include "storage/relfilelocator.h"
#include "utils/relcache.h"

Include dependency graph for xloginsert.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#define	XLR_NORMAL_MAX_BLOCK_ID 4

#define	XLR_NORMAL_RDATAS 20

#define	REGBUF_FORCE_IMAGE 0x01 /* force a full-page image */

#define	REGBUF_NO_IMAGE 0x02 /* don't take a full-page image */

#define	REGBUF_WILL_INIT

#define	REGBUF_STANDARD

#define	REGBUF_KEEP_DATA

#define	REGBUF_NO_CHANGE 0x20 /* intentionally register clean buffer */

Functions
void	XLogBeginInsert (void)

void	XLogSetRecordFlags (uint8 flags)

XLogRecPtr	XLogInsert (RmgrId rmid, uint8 info)

void	XLogEnsureRecordSpace (int max_block_id, int ndatas)

void	XLogRegisterData (const void *data, uint32 len)

void	XLogRegisterBuffer (uint8 block_id, Buffer buffer, uint8 flags)

void	XLogRegisterBlock (uint8 block_id, RelFileLocator rlocator, ForkNumber forknum, BlockNumber blknum, const PageData page, uint8 flags)

void	XLogRegisterBufData (uint8 block_id, const void *data, uint32 len)

void	XLogResetInsertion (void)

bool	XLogCheckBufferNeedsBackup (Buffer buffer)

XLogRecPtr	log_newpage (RelFileLocator *rlocator, ForkNumber forknum, BlockNumber blkno, Page page, bool page_std)

void	log_newpages (RelFileLocator rlocator, ForkNumber forknum, int num_pages, BlockNumber blknos, Page *pages, bool page_std)

XLogRecPtr	log_newpage_buffer (Buffer buffer, bool page_std)

void	log_newpage_range (Relation rel, ForkNumber forknum, BlockNumber startblk, BlockNumber endblk, bool page_std)

XLogRecPtr	XLogSaveBufferForHint (Buffer buffer, bool buffer_std)

void	InitXLogInsert (void)

Macro Definition Documentation

◆ REGBUF_FORCE_IMAGE

#define REGBUF_FORCE_IMAGE 0x01 /* force a full-page image */

Definition at line 32 of file xloginsert.h.

◆ REGBUF_KEEP_DATA

#define REGBUF_KEEP_DATA

Value:

0x10 /* include data even if a full-page image

* is taken */

Definition at line 36 of file xloginsert.h.

◆ REGBUF_NO_CHANGE

#define REGBUF_NO_CHANGE 0x20 /* intentionally register clean buffer */

Definition at line 37 of file xloginsert.h.

◆ REGBUF_NO_IMAGE

#define REGBUF_NO_IMAGE 0x02 /* don't take a full-page image */

Definition at line 33 of file xloginsert.h.

◆ REGBUF_STANDARD

#define REGBUF_STANDARD

Value:

                                     0x08   /* page follows "standard" page layout,
                                     * (data between pd_lower and pd_upper
                                     * will be skipped) */

Definition at line 35 of file xloginsert.h.

◆ REGBUF_WILL_INIT

#define REGBUF_WILL_INIT

Value:

(0x04 | 0x02) /* page will be re-initialized at

* replay (implies NO_IMAGE) */

Definition at line 34 of file xloginsert.h.

◆ XLR_NORMAL_MAX_BLOCK_ID

#define XLR_NORMAL_MAX_BLOCK_ID 4

Definition at line 28 of file xloginsert.h.

◆ XLR_NORMAL_RDATAS

#define XLR_NORMAL_RDATAS 20

Definition at line 29 of file xloginsert.h.

Function Documentation

◆ InitXLogInsert()

void InitXLogInsert ( void )

Definition at line 1348 of file xloginsert.c.

{
#ifdef USE_ASSERT_CHECKING
 
    /*
     * Check that any records assembled can be decoded.  This is capped based
     * on what XLogReader would require at its maximum bound.  The XLOG_BLCKSZ
     * addend covers the larger allocate_recordbuf() demand.  This code path
     * is called once per backend, more than enough for this check.
     */
    size_t      max_required =
        DecodeXLogRecordRequiredSpace(XLogRecordMaxSize + XLOG_BLCKSZ);
 
    Assert(AllocSizeIsValid(max_required));
#endif
 
    /* Initialize the working areas */
    if (xloginsert_cxt == NULL)
    {
        xloginsert_cxt = AllocSetContextCreate(TopMemoryContext,
                                               "WAL record construction",
                                               ALLOCSET_DEFAULT_SIZES);
    }
 
    if (registered_buffers == NULL)
    {
        registered_buffers = (registered_buffer *)
            MemoryContextAllocZero(xloginsert_cxt,
                                   sizeof(registered_buffer) * (XLR_NORMAL_MAX_BLOCK_ID + 1));
        max_registered_buffers = XLR_NORMAL_MAX_BLOCK_ID + 1;
    }
    if (rdatas == NULL)
    {
        rdatas = MemoryContextAlloc(xloginsert_cxt,
                                    sizeof(XLogRecData) * XLR_NORMAL_RDATAS);
        max_rdatas = XLR_NORMAL_RDATAS;
    }
 
    /*
     * Allocate a buffer to hold the header information for a WAL record.
     */
    if (hdr_scratch == NULL)
        hdr_scratch = MemoryContextAllocZero(xloginsert_cxt,
                                             HEADER_SCRATCH_SIZE);
}

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, AllocSizeIsValid, Assert(), DecodeXLogRecordRequiredSpace(), hdr_scratch, HEADER_SCRATCH_SIZE, max_rdatas, max_registered_buffers, MemoryContextAlloc(), MemoryContextAllocZero(), rdatas, registered_buffers, TopMemoryContext, xloginsert_cxt, XLogRecordMaxSize, XLR_NORMAL_MAX_BLOCK_ID, and XLR_NORMAL_RDATAS.

Referenced by BaseInit().

◆ log_newpage()

XLogRecPtr log_newpage	(	RelFileLocator *	rlocator,
		ForkNumber	forknum,
		BlockNumber	blkno,
		Page	page,
		bool	page_std
	)

Definition at line 1143 of file xloginsert.c.

{
    int         flags;
    XLogRecPtr  recptr;
 
    flags = REGBUF_FORCE_IMAGE;
    if (page_std)
        flags |= REGBUF_STANDARD;
 
    XLogBeginInsert();
    XLogRegisterBlock(0, rlocator, forknum, blkno, page, flags);
    recptr = XLogInsert(RM_XLOG_ID, XLOG_FPI);
 
    /*
     * The page may be uninitialized. If so, we can't set the LSN because that
     * would corrupt the page.
     */
    if (!PageIsNew(page))
    {
        PageSetLSN(page, recptr);
    }
 
    return recptr;
}

References PageIsNew(), PageSetLSN(), REGBUF_FORCE_IMAGE, REGBUF_STANDARD, XLOG_FPI, XLogBeginInsert(), XLogInsert(), and XLogRegisterBlock().

Referenced by _hash_alloc_buckets(), _hash_init(), and log_newpage_buffer().

◆ log_newpage_buffer()

XLogRecPtr log_newpage_buffer	(	Buffer	buffer,
		bool	page_std
	)

Definition at line 1237 of file xloginsert.c.

{
    Page        page = BufferGetPage(buffer);
    RelFileLocator rlocator;
    ForkNumber  forknum;
    BlockNumber blkno;
 
    /* Shared buffers should be modified in a critical section. */
    Assert(CritSectionCount > 0);
 
    BufferGetTag(buffer, &rlocator, &forknum, &blkno);
 
    return log_newpage(&rlocator, forknum, blkno, page, page_std);
}

References Assert(), BufferGetPage(), BufferGetTag(), CritSectionCount, and log_newpage().

Referenced by brin_initialize_empty_new_buffer(), brinbuildempty(), FreeSpaceMapPrepareTruncateRel(), ginbuildempty(), gistbuildempty(), heap_force_common(), lazy_scan_new_or_empty(), RelationCopyStorageUsingBuffer(), and visibilitymap_prepare_truncate().

◆ log_newpage_range()

void log_newpage_range	(	Relation	rel,
		ForkNumber	forknum,
		BlockNumber	startblk,
		BlockNumber	endblk,
		bool	page_std
	)

Definition at line 1270 of file xloginsert.c.

{
    int         flags;
    BlockNumber blkno;
 
    flags = REGBUF_FORCE_IMAGE;
    if (page_std)
        flags |= REGBUF_STANDARD;
 
    /*
     * Iterate over all the pages in the range. They are collected into
     * batches of XLR_MAX_BLOCK_ID pages, and a single WAL-record is written
     * for each batch.
     */
    XLogEnsureRecordSpace(XLR_MAX_BLOCK_ID - 1, 0);
 
    blkno = startblk;
    while (blkno < endblk)
    {
        Buffer      bufpack[XLR_MAX_BLOCK_ID];
        XLogRecPtr  recptr;
        int         nbufs;
        int         i;
 
        CHECK_FOR_INTERRUPTS();
 
        /* Collect a batch of blocks. */
        nbufs = 0;
        while (nbufs < XLR_MAX_BLOCK_ID && blkno < endblk)
        {
            Buffer      buf = ReadBufferExtended(rel, forknum, blkno,
                                                 RBM_NORMAL, NULL);
 
            LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);
 
            /*
             * Completely empty pages are not WAL-logged. Writing a WAL record
             * would change the LSN, and we don't want that. We want the page
             * to stay empty.
             */
            if (!PageIsNew(BufferGetPage(buf)))
                bufpack[nbufs++] = buf;
            else
                UnlockReleaseBuffer(buf);
            blkno++;
        }
 
        /* Nothing more to do if all remaining blocks were empty. */
        if (nbufs == 0)
            break;
 
        /* Write WAL record for this batch. */
        XLogBeginInsert();
 
        START_CRIT_SECTION();
        for (i = 0; i < nbufs; i++)
        {
            MarkBufferDirty(bufpack[i]);
            XLogRegisterBuffer(i, bufpack[i], flags);
        }
 
        recptr = XLogInsert(RM_XLOG_ID, XLOG_FPI);
 
        for (i = 0; i < nbufs; i++)
        {
            PageSetLSN(BufferGetPage(bufpack[i]), recptr);
            UnlockReleaseBuffer(bufpack[i]);
        }
        END_CRIT_SECTION();
    }
}

References buf, BUFFER_LOCK_EXCLUSIVE, BufferGetPage(), CHECK_FOR_INTERRUPTS, END_CRIT_SECTION, i, LockBuffer(), MarkBufferDirty(), PageIsNew(), PageSetLSN(), RBM_NORMAL, ReadBufferExtended(), REGBUF_FORCE_IMAGE, REGBUF_STANDARD, START_CRIT_SECTION, UnlockReleaseBuffer(), XLOG_FPI, XLogBeginInsert(), XLogEnsureRecordSpace(), XLogInsert(), XLogRegisterBuffer(), and XLR_MAX_BLOCK_ID.

Referenced by ginbuild(), gistbuild(), smgrDoPendingSyncs(), and spgbuild().

◆ log_newpages()

void log_newpages	(	RelFileLocator *	rlocator,
		ForkNumber	forknum,
		int	num_pages,
		BlockNumber *	blknos,
		Page *	pages,
		bool	page_std
	)

Definition at line 1175 of file xloginsert.c.

{
    int         flags;
    XLogRecPtr  recptr;
    int         i;
    int         j;
 
    flags = REGBUF_FORCE_IMAGE;
    if (page_std)
        flags |= REGBUF_STANDARD;
 
    /*
     * Iterate over all the pages. They are collected into batches of
     * XLR_MAX_BLOCK_ID pages, and a single WAL-record is written for each
     * batch.
     */
    XLogEnsureRecordSpace(XLR_MAX_BLOCK_ID - 1, 0);
 
    i = 0;
    while (i < num_pages)
    {
        int         batch_start = i;
        int         nbatch;
 
        XLogBeginInsert();
 
        nbatch = 0;
        while (nbatch < XLR_MAX_BLOCK_ID && i < num_pages)
        {
            XLogRegisterBlock(nbatch, rlocator, forknum, blknos[i], pages[i], flags);
            i++;
            nbatch++;
        }
 
        recptr = XLogInsert(RM_XLOG_ID, XLOG_FPI);
 
        for (j = batch_start; j < i; j++)
        {
            /*
             * The page may be uninitialized. If so, we can't set the LSN
             * because that would corrupt the page.
             */
            if (!PageIsNew(pages[j]))
            {
                PageSetLSN(pages[j], recptr);
            }
        }
    }
}

References batch_start(), i, j, PageIsNew(), PageSetLSN(), REGBUF_FORCE_IMAGE, REGBUF_STANDARD, XLOG_FPI, XLogBeginInsert(), XLogEnsureRecordSpace(), XLogInsert(), XLogRegisterBlock(), and XLR_MAX_BLOCK_ID.

Referenced by smgr_bulk_flush().

◆ XLogBeginInsert()

void XLogBeginInsert ( void )

Definition at line 149 of file xloginsert.c.

{
    Assert(max_registered_block_id == 0);
    Assert(mainrdata_last == (XLogRecData *) &mainrdata_head);
    Assert(mainrdata_len == 0);
 
    /* cross-check on whether we should be here or not */
    if (!XLogInsertAllowed())
        elog(ERROR, "cannot make new WAL entries during recovery");
 
    if (begininsert_called)
        elog(ERROR, "XLogBeginInsert was already called");
 
    begininsert_called = true;
}

References Assert(), begininsert_called, elog, ERROR, mainrdata_head, mainrdata_last, mainrdata_len, max_registered_block_id, and XLogInsertAllowed().

Referenced by _bt_allocbuf(), _bt_dedup_pass(), _bt_delitems_delete(), _bt_delitems_vacuum(), _bt_getroot(), _bt_insertonpg(), _bt_mark_page_halfdead(), _bt_newlevel(), _bt_set_cleanup_info(), _bt_split(), _bt_unlink_halfdead_page(), _hash_addovflpage(), _hash_doinsert(), _hash_expandtable(), _hash_freeovflpage(), _hash_init(), _hash_splitbucket(), _hash_squeezebucket(), _hash_vacuum_one_page(), addLeafTuple(), AssignTransactionId(), brin_doinsert(), brin_doupdate(), brinbuild(), brinRevmapDesummarizeRange(), CreateCheckPoint(), CreateDatabaseUsingFileCopy(), CreateDirAndVersionFile(), CreateEndOfRecoveryRecord(), CreateOverwriteContrecordRecord(), createPostingTree(), CreateTableSpace(), do_pg_backup_stop(), do_setval(), doPickSplit(), DropTableSpace(), EndPrepare(), ExecuteTruncateGuts(), fill_seq_fork_with_data(), GenericXLogFinish(), ginDeletePage(), ginHeapTupleFastInsert(), ginPlaceToPage(), ginUpdateStats(), ginVacuumPostingTreeLeaf(), gistXLogAssignLSN(), gistXLogDelete(), gistXLogPageDelete(), gistXLogPageReuse(), gistXLogSplit(), gistXLogUpdate(), hashbucketcleanup(), hashbulkdelete(), heap_abort_speculative(), heap_delete(), heap_finish_speculative(), heap_inplace_update_and_unlock(), heap_insert(), heap_lock_tuple(), heap_lock_updated_tuple_rec(), heap_multi_insert(), heap_update(), log_heap_new_cid(), log_heap_prune_and_freeze(), log_heap_update(), log_heap_visible(), log_newpage(), log_newpage_range(), log_newpages(), log_smgrcreate(), log_split_page(), LogAccessExclusiveLocks(), LogCurrentRunningXacts(), logical_heap_rewrite_flush_mappings(), LogLogicalInvalidations(), LogLogicalMessage(), LogStandbyInvalidations(), movedb(), moveLeafs(), MultiXactIdCreateFromMembers(), nextval_internal(), pg_truncate_visibility_map(), RelationTruncate(), remove_dbtablespaces(), replorigin_advance(), replorigin_state_clear(), RequestXLogSwitch(), revmap_physical_extend(), shiftList(), spgAddNodeAction(), spgSplitNodeAction(), test_custom_rmgrs_insert_wal_record(), UpdateFullPageWrites(), vacuumLeafPage(), vacuumLeafRoot(), vacuumRedirectAndPlaceholder(), write_relmap_file(), writeListPage(), WriteMTruncateXlogRec(), WriteMZeroPageXlogRec(), WriteTruncateXlogRec(), WriteZeroPageXlogRec(), XactLogAbortRecord(), XactLogCommitRecord(), XLogPutNextOid(), XLogReportParameters(), XLogRestorePoint(), XLogSaveBufferForHint(), and xlogVacuumPage().

◆ XLogCheckBufferNeedsBackup()

bool XLogCheckBufferNeedsBackup ( Buffer buffer )

Definition at line 1027 of file xloginsert.c.

{
    XLogRecPtr  RedoRecPtr;
    bool        doPageWrites;
    Page        page;
 
    GetFullPageWriteInfo(&RedoRecPtr, &doPageWrites);
 
    page = BufferGetPage(buffer);
 
    if (doPageWrites && PageGetLSN(page) <= RedoRecPtr)
        return true;            /* buffer requires backup */
 
    return false;               /* buffer does not need to be backed up */
}

References BufferGetPage(), doPageWrites, GetFullPageWriteInfo(), PageGetLSN(), and RedoRecPtr.

Referenced by heap_page_prune_and_freeze(), and log_heap_update().

◆ XLogEnsureRecordSpace()

void XLogEnsureRecordSpace	(	int	max_block_id,
		int	ndatas
	)

Definition at line 175 of file xloginsert.c.

{
    int         nbuffers;
 
    /*
     * This must be called before entering a critical section, because
     * allocating memory inside a critical section can fail. repalloc() will
     * check the same, but better to check it here too so that we fail
     * consistently even if the arrays happen to be large enough already.
     */
    Assert(CritSectionCount == 0);
 
    /* the minimum values can't be decreased */
    if (max_block_id < XLR_NORMAL_MAX_BLOCK_ID)
        max_block_id = XLR_NORMAL_MAX_BLOCK_ID;
    if (ndatas < XLR_NORMAL_RDATAS)
        ndatas = XLR_NORMAL_RDATAS;
 
    if (max_block_id > XLR_MAX_BLOCK_ID)
        elog(ERROR, "maximum number of WAL record block references exceeded");
    nbuffers = max_block_id + 1;
 
    if (nbuffers > max_registered_buffers)
    {
        registered_buffers = (registered_buffer *)
            repalloc(registered_buffers, sizeof(registered_buffer) * nbuffers);
 
        /*
         * At least the padding bytes in the structs must be zeroed, because
         * they are included in WAL data, but initialize it all for tidiness.
         */
        MemSet(&registered_buffers[max_registered_buffers], 0,
               (nbuffers - max_registered_buffers) * sizeof(registered_buffer));
        max_registered_buffers = nbuffers;
    }
 
    if (ndatas > max_rdatas)
    {
        rdatas = (XLogRecData *) repalloc(rdatas, sizeof(XLogRecData) * ndatas);
        max_rdatas = ndatas;
    }
}

References Assert(), CritSectionCount, elog, ERROR, max_rdatas, max_registered_buffers, MemSet, rdatas, registered_buffers, repalloc(), XLR_MAX_BLOCK_ID, XLR_NORMAL_MAX_BLOCK_ID, and XLR_NORMAL_RDATAS.

Referenced by _hash_freeovflpage(), _hash_squeezebucket(), EndPrepare(), gistplacetopage(), log_newpage_range(), log_newpages(), and shiftList().

◆ XLogInsert()

XLogRecPtr XLogInsert	(	RmgrId	rmid,
		uint8	info
	)

Definition at line 474 of file xloginsert.c.

{
    XLogRecPtr  EndPos;
 
    /* XLogBeginInsert() must have been called. */
    if (!begininsert_called)
        elog(ERROR, "XLogBeginInsert was not called");
 
    /*
     * The caller can set rmgr bits, XLR_SPECIAL_REL_UPDATE and
     * XLR_CHECK_CONSISTENCY; the rest are reserved for use by me.
     */
    if ((info & ~(XLR_RMGR_INFO_MASK |
                  XLR_SPECIAL_REL_UPDATE |
                  XLR_CHECK_CONSISTENCY)) != 0)
        elog(PANIC, "invalid xlog info mask %02X", info);
 
    TRACE_POSTGRESQL_WAL_INSERT(rmid, info);
 
    /*
     * In bootstrap mode, we don't actually log anything but XLOG resources;
     * return a phony record pointer.
     */
    if (IsBootstrapProcessingMode() && rmid != RM_XLOG_ID)
    {
        XLogResetInsertion();
        EndPos = SizeOfXLogLongPHD; /* start of 1st chkpt record */
        return EndPos;
    }
 
    do
    {
        XLogRecPtr  RedoRecPtr;
        bool        doPageWrites;
        bool        topxid_included = false;
        XLogRecPtr  fpw_lsn;
        XLogRecData *rdt;
        int         num_fpi = 0;
 
        /*
         * Get values needed to decide whether to do full-page writes. Since
         * we don't yet have an insertion lock, these could change under us,
         * but XLogInsertRecord will recheck them once it has a lock.
         */
        GetFullPageWriteInfo(&RedoRecPtr, &doPageWrites);
 
        rdt = XLogRecordAssemble(rmid, info, RedoRecPtr, doPageWrites,
                                 &fpw_lsn, &num_fpi, &topxid_included);
 
        EndPos = XLogInsertRecord(rdt, fpw_lsn, curinsert_flags, num_fpi,
                                  topxid_included);
    } while (EndPos == InvalidXLogRecPtr);
 
    XLogResetInsertion();
 
    return EndPos;
}

References begininsert_called, curinsert_flags, doPageWrites, elog, ERROR, GetFullPageWriteInfo(), InvalidXLogRecPtr, IsBootstrapProcessingMode, PANIC, RedoRecPtr, SizeOfXLogLongPHD, XLogInsertRecord(), XLogRecordAssemble(), XLogResetInsertion(), XLR_CHECK_CONSISTENCY, XLR_RMGR_INFO_MASK, and XLR_SPECIAL_REL_UPDATE.

Referenced by _bt_allocbuf(), _bt_dedup_pass(), _bt_delitems_delete(), _bt_delitems_vacuum(), _bt_getroot(), _bt_insertonpg(), _bt_mark_page_halfdead(), _bt_newlevel(), _bt_set_cleanup_info(), _bt_split(), _bt_unlink_halfdead_page(), _hash_addovflpage(), _hash_doinsert(), _hash_expandtable(), _hash_freeovflpage(), _hash_init(), _hash_splitbucket(), _hash_squeezebucket(), _hash_vacuum_one_page(), addLeafTuple(), AssignTransactionId(), brin_doinsert(), brin_doupdate(), brinbuild(), brinRevmapDesummarizeRange(), CreateCheckPoint(), CreateDatabaseUsingFileCopy(), CreateDirAndVersionFile(), CreateEndOfRecoveryRecord(), CreateOverwriteContrecordRecord(), createPostingTree(), CreateTableSpace(), do_pg_backup_stop(), do_setval(), doPickSplit(), DropTableSpace(), EndPrepare(), ExecuteTruncateGuts(), fill_seq_fork_with_data(), GenericXLogFinish(), ginDeletePage(), ginHeapTupleFastInsert(), ginPlaceToPage(), ginUpdateStats(), ginVacuumPostingTreeLeaf(), gistXLogAssignLSN(), gistXLogDelete(), gistXLogPageDelete(), gistXLogPageReuse(), gistXLogSplit(), gistXLogUpdate(), hashbucketcleanup(), hashbulkdelete(), heap_abort_speculative(), heap_delete(), heap_finish_speculative(), heap_inplace_update_and_unlock(), heap_insert(), heap_lock_tuple(), heap_lock_updated_tuple_rec(), heap_multi_insert(), heap_update(), log_heap_new_cid(), log_heap_prune_and_freeze(), log_heap_update(), log_heap_visible(), log_newpage(), log_newpage_range(), log_newpages(), log_smgrcreate(), log_split_page(), LogAccessExclusiveLocks(), LogCurrentRunningXacts(), logical_heap_rewrite_flush_mappings(), LogLogicalInvalidations(), LogLogicalMessage(), LogStandbyInvalidations(), movedb(), moveLeafs(), MultiXactIdCreateFromMembers(), nextval_internal(), pg_truncate_visibility_map(), RelationTruncate(), remove_dbtablespaces(), replorigin_advance(), replorigin_state_clear(), RequestXLogSwitch(), revmap_physical_extend(), shiftList(), spgAddNodeAction(), spgSplitNodeAction(), test_custom_rmgrs_insert_wal_record(), UpdateFullPageWrites(), vacuumLeafPage(), vacuumLeafRoot(), vacuumRedirectAndPlaceholder(), write_relmap_file(), writeListPage(), WriteMTruncateXlogRec(), WriteMZeroPageXlogRec(), WriteTruncateXlogRec(), WriteZeroPageXlogRec(), XactLogAbortRecord(), XactLogCommitRecord(), XLogPutNextOid(), XLogReportParameters(), XLogRestorePoint(), XLogSaveBufferForHint(), and xlogVacuumPage().

◆ XLogRegisterBlock()

void XLogRegisterBlock	(	uint8	block_id,
		RelFileLocator *	rlocator,
		ForkNumber	forknum,
		BlockNumber	blknum,
		const PageData *	page,
		uint8	flags
	)

Definition at line 309 of file xloginsert.c.

{
    registered_buffer *regbuf;
 
    Assert(begininsert_called);
 
    if (block_id >= max_registered_block_id)
        max_registered_block_id = block_id + 1;
 
    if (block_id >= max_registered_buffers)
        elog(ERROR, "too many registered buffers");
 
    regbuf = &registered_buffers[block_id];
 
    regbuf->rlocator = *rlocator;
    regbuf->forkno = forknum;
    regbuf->block = blknum;
    regbuf->page = page;
    regbuf->flags = flags;
    regbuf->rdata_tail = (XLogRecData *) &regbuf->rdata_head;
    regbuf->rdata_len = 0;
 
    /*
     * Check that this page hasn't already been registered with some other
     * block_id.
     */
#ifdef USE_ASSERT_CHECKING
    {
        int         i;
 
        for (i = 0; i < max_registered_block_id; i++)
        {
            registered_buffer *regbuf_old = &registered_buffers[i];
 
            if (i == block_id || !regbuf_old->in_use)
                continue;
 
            Assert(!RelFileLocatorEquals(regbuf_old->rlocator, regbuf->rlocator) ||
                   regbuf_old->forkno != regbuf->forkno ||
                   regbuf_old->block != regbuf->block);
        }
    }
#endif
 
    regbuf->in_use = true;
}

References Assert(), begininsert_called, registered_buffer::block, elog, ERROR, registered_buffer::flags, for(), registered_buffer::forkno, i, registered_buffer::in_use, max_registered_block_id, max_registered_buffers, registered_buffer::page, registered_buffer::rdata_head, registered_buffer::rdata_len, registered_buffer::rdata_tail, registered_buffers, RelFileLocatorEquals, and registered_buffer::rlocator.

Referenced by heap_inplace_update_and_unlock(), log_newpage(), log_newpages(), and XLogSaveBufferForHint().

◆ XLogRegisterBufData()

void XLogRegisterBufData	(	uint8	block_id,
		const void *	data,
		uint32	len
	)

Definition at line 405 of file xloginsert.c.

{
    registered_buffer *regbuf;
    XLogRecData *rdata;
 
    Assert(begininsert_called);
 
    /* find the registered buffer struct */
    regbuf = &registered_buffers[block_id];
    if (!regbuf->in_use)
        elog(ERROR, "no block with id %d registered with WAL insertion",
             block_id);
 
    /*
     * Check against max_rdatas and ensure we do not register more data per
     * buffer than can be handled by the physical data format; i.e. that
     * regbuf->rdata_len does not grow beyond what
     * XLogRecordBlockHeader->data_length can hold.
     */
    if (num_rdatas >= max_rdatas)
        ereport(ERROR,
                (errmsg_internal("too much WAL data"),
                 errdetail_internal("%d out of %d data segments are already in use.",
                                    num_rdatas, max_rdatas)));
    if (regbuf->rdata_len + len > UINT16_MAX || len > UINT16_MAX)
        ereport(ERROR,
                (errmsg_internal("too much WAL data"),
                 errdetail_internal("Registering more than maximum %u bytes allowed to block %u: current %u bytes, adding %u bytes.",
                                    UINT16_MAX, block_id, regbuf->rdata_len, len)));
 
    rdata = &rdatas[num_rdatas++];
 
    rdata->data = data;
    rdata->len = len;
 
    regbuf->rdata_tail->next = rdata;
    regbuf->rdata_tail = rdata;
    regbuf->rdata_len += len;
}

References Assert(), begininsert_called, XLogRecData::data, data, elog, ereport, errdetail_internal(), errmsg_internal(), ERROR, registered_buffer::in_use, XLogRecData::len, len, max_rdatas, XLogRecData::next, num_rdatas, registered_buffer::rdata_len, registered_buffer::rdata_tail, rdatas, and registered_buffers.

Referenced by _bt_dedup_pass(), _bt_delitems_delete(), _bt_delitems_vacuum(), _bt_getroot(), _bt_insertonpg(), _bt_newlevel(), _bt_set_cleanup_info(), _bt_split(), _bt_unlink_halfdead_page(), _hash_addovflpage(), _hash_doinsert(), _hash_expandtable(), _hash_freeovflpage(), _hash_squeezebucket(), brin_doinsert(), brin_doupdate(), dataExecPlaceToPageInternal(), dataExecPlaceToPageLeaf(), entryExecPlaceToPage(), GenericXLogFinish(), ginHeapTupleFastInsert(), ginVacuumPostingTreeLeaf(), gistXLogSplit(), gistXLogUpdate(), hashbucketcleanup(), heap_inplace_update_and_unlock(), heap_insert(), heap_multi_insert(), log_heap_prune_and_freeze(), log_heap_update(), and writeListPage().

◆ XLogRegisterBuffer()

void XLogRegisterBuffer	(	uint8	block_id,
		Buffer	buffer,
		uint8	flags
	)

Definition at line 242 of file xloginsert.c.

{
    registered_buffer *regbuf;
 
    /* NO_IMAGE doesn't make sense with FORCE_IMAGE */
    Assert(!((flags & REGBUF_FORCE_IMAGE) && (flags & (REGBUF_NO_IMAGE))));
    Assert(begininsert_called);
 
    /*
     * Ordinarily, buffer should be exclusive-locked and marked dirty before
     * we get here, otherwise we could end up violating one of the rules in
     * access/transam/README.
     *
     * Some callers intentionally register a clean page and never update that
     * page's LSN; in that case they can pass the flag REGBUF_NO_CHANGE to
     * bypass these checks.
     */
#ifdef USE_ASSERT_CHECKING
    if (!(flags & REGBUF_NO_CHANGE))
        Assert(BufferIsExclusiveLocked(buffer) && BufferIsDirty(buffer));
#endif
 
    if (block_id >= max_registered_block_id)
    {
        if (block_id >= max_registered_buffers)
            elog(ERROR, "too many registered buffers");
        max_registered_block_id = block_id + 1;
    }
 
    regbuf = &registered_buffers[block_id];
 
    BufferGetTag(buffer, &regbuf->rlocator, &regbuf->forkno, &regbuf->block);
    regbuf->page = BufferGetPage(buffer);
    regbuf->flags = flags;
    regbuf->rdata_tail = (XLogRecData *) &regbuf->rdata_head;
    regbuf->rdata_len = 0;
 
    /*
     * Check that this page hasn't already been registered with some other
     * block_id.
     */
#ifdef USE_ASSERT_CHECKING
    {
        int         i;
 
        for (i = 0; i < max_registered_block_id; i++)
        {
            registered_buffer *regbuf_old = &registered_buffers[i];
 
            if (i == block_id || !regbuf_old->in_use)
                continue;
 
            Assert(!RelFileLocatorEquals(regbuf_old->rlocator, regbuf->rlocator) ||
                   regbuf_old->forkno != regbuf->forkno ||
                   regbuf_old->block != regbuf->block);
        }
    }
#endif
 
    regbuf->in_use = true;
}

Referenced by _bt_dedup_pass(), _bt_delitems_delete(), _bt_delitems_vacuum(), _bt_getroot(), _bt_insertonpg(), _bt_mark_page_halfdead(), _bt_newlevel(), _bt_set_cleanup_info(), _bt_split(), _bt_unlink_halfdead_page(), _hash_addovflpage(), _hash_doinsert(), _hash_expandtable(), _hash_freeovflpage(), _hash_init(), _hash_splitbucket(), _hash_squeezebucket(), _hash_vacuum_one_page(), addLeafTuple(), brin_doinsert(), brin_doupdate(), brinbuild(), brinRevmapDesummarizeRange(), createPostingTree(), dataExecPlaceToPageInternal(), dataExecPlaceToPageLeaf(), do_setval(), doPickSplit(), entryExecPlaceToPage(), fill_seq_fork_with_data(), GenericXLogFinish(), ginDeletePage(), ginHeapTupleFastInsert(), ginPlaceToPage(), ginUpdateStats(), ginVacuumPostingTreeLeaf(), gistXLogDelete(), gistXLogPageDelete(), gistXLogSplit(), gistXLogUpdate(), hashbucketcleanup(), hashbulkdelete(), heap_abort_speculative(), heap_delete(), heap_finish_speculative(), heap_insert(), heap_lock_tuple(), heap_lock_updated_tuple_rec(), heap_multi_insert(), heap_update(), log_heap_prune_and_freeze(), log_heap_update(), log_heap_visible(), log_newpage_range(), log_split_page(), moveLeafs(), nextval_internal(), revmap_physical_extend(), shiftList(), spgAddNodeAction(), spgSplitNodeAction(), vacuumLeafPage(), vacuumLeafRoot(), vacuumRedirectAndPlaceholder(), writeListPage(), and xlogVacuumPage().

◆ XLogRegisterData()

void XLogRegisterData	(	const void *	data,
		uint32	len
	)

Definition at line 364 of file xloginsert.c.

{
    XLogRecData *rdata;
 
    Assert(begininsert_called);
 
    if (num_rdatas >= max_rdatas)
        ereport(ERROR,
                (errmsg_internal("too much WAL data"),
                 errdetail_internal("%d out of %d data segments are already in use.",
                                    num_rdatas, max_rdatas)));
    rdata = &rdatas[num_rdatas++];
 
    rdata->data = data;
    rdata->len = len;
 
    /*
     * we use the mainrdata_last pointer to track the end of the chain, so no
     * need to clear 'next' here.
     */
 
    mainrdata_last->next = rdata;
    mainrdata_last = rdata;
 
    mainrdata_len += len;
}

References Assert(), begininsert_called, XLogRecData::data, data, ereport, errdetail_internal(), errmsg_internal(), ERROR, XLogRecData::len, len, mainrdata_last, mainrdata_len, max_rdatas, XLogRecData::next, num_rdatas, and rdatas.

Referenced by _bt_allocbuf(), _bt_dedup_pass(), _bt_delitems_delete(), _bt_delitems_vacuum(), _bt_getroot(), _bt_insertonpg(), _bt_mark_page_halfdead(), _bt_newlevel(), _bt_split(), _bt_unlink_halfdead_page(), _hash_addovflpage(), _hash_doinsert(), _hash_expandtable(), _hash_freeovflpage(), _hash_init(), _hash_splitbucket(), _hash_squeezebucket(), _hash_vacuum_one_page(), addLeafTuple(), AssignTransactionId(), brin_doinsert(), brin_doupdate(), brinbuild(), brinRevmapDesummarizeRange(), CreateCheckPoint(), CreateDatabaseUsingFileCopy(), CreateDirAndVersionFile(), CreateEndOfRecoveryRecord(), CreateOverwriteContrecordRecord(), createPostingTree(), CreateTableSpace(), do_pg_backup_stop(), do_setval(), doPickSplit(), DropTableSpace(), EndPrepare(), ExecuteTruncateGuts(), fill_seq_fork_with_data(), ginDeletePage(), ginHeapTupleFastInsert(), ginPlaceToPage(), ginUpdateStats(), gistXLogAssignLSN(), gistXLogDelete(), gistXLogPageDelete(), gistXLogPageReuse(), gistXLogSplit(), gistXLogUpdate(), hashbucketcleanup(), hashbulkdelete(), heap_abort_speculative(), heap_delete(), heap_finish_speculative(), heap_inplace_update_and_unlock(), heap_insert(), heap_lock_tuple(), heap_lock_updated_tuple_rec(), heap_multi_insert(), heap_update(), log_heap_new_cid(), log_heap_prune_and_freeze(), log_heap_update(), log_heap_visible(), log_smgrcreate(), LogAccessExclusiveLocks(), LogCurrentRunningXacts(), logical_heap_rewrite_flush_mappings(), LogLogicalInvalidations(), LogLogicalMessage(), LogStandbyInvalidations(), movedb(), moveLeafs(), MultiXactIdCreateFromMembers(), nextval_internal(), pg_truncate_visibility_map(), RelationTruncate(), remove_dbtablespaces(), replorigin_advance(), replorigin_state_clear(), revmap_physical_extend(), shiftList(), spgAddNodeAction(), spgSplitNodeAction(), test_custom_rmgrs_insert_wal_record(), UpdateFullPageWrites(), vacuumLeafPage(), vacuumLeafRoot(), vacuumRedirectAndPlaceholder(), write_relmap_file(), writeListPage(), WriteMTruncateXlogRec(), WriteMZeroPageXlogRec(), WriteTruncateXlogRec(), WriteZeroPageXlogRec(), XactLogAbortRecord(), XactLogCommitRecord(), XLogPutNextOid(), XLogReportParameters(), and XLogRestorePoint().

◆ XLogResetInsertion()

void XLogResetInsertion ( void )

Definition at line 222 of file xloginsert.c.

{
    int         i;
 
    for (i = 0; i < max_registered_block_id; i++)
        registered_buffers[i].in_use = false;
 
    num_rdatas = 0;
    max_registered_block_id = 0;
    mainrdata_len = 0;
    mainrdata_last = (XLogRecData *) &mainrdata_head;
    curinsert_flags = 0;
    begininsert_called = false;
}

References begininsert_called, curinsert_flags, i, mainrdata_head, mainrdata_last, mainrdata_len, max_registered_block_id, num_rdatas, and registered_buffers.

Referenced by AbortSubTransaction(), AbortTransaction(), and XLogInsert().

◆ XLogSaveBufferForHint()

XLogRecPtr XLogSaveBufferForHint	(	Buffer	buffer,
		bool	buffer_std
	)

Definition at line 1065 of file xloginsert.c.

{
    XLogRecPtr  recptr = InvalidXLogRecPtr;
    XLogRecPtr  lsn;
    XLogRecPtr  RedoRecPtr;
 
    /*
     * Ensure no checkpoint can change our view of RedoRecPtr.
     */
    Assert((MyProc->delayChkptFlags & DELAY_CHKPT_START) != 0);
 
    /*
     * Update RedoRecPtr so that we can make the right decision
     */
    RedoRecPtr = GetRedoRecPtr();
 
    /*
     * We assume page LSN is first data on *every* page that can be passed to
     * XLogInsert, whether it has the standard page layout or not. Since we're
     * only holding a share-lock on the page, we must take the buffer header
     * lock when we look at the LSN.
     */
    lsn = BufferGetLSNAtomic(buffer);
 
    if (lsn <= RedoRecPtr)
    {
        int         flags = 0;
        PGAlignedBlock copied_buffer;
        char       *origdata = (char *) BufferGetBlock(buffer);
        RelFileLocator rlocator;
        ForkNumber  forkno;
        BlockNumber blkno;
 
        /*
         * Copy buffer so we don't have to worry about concurrent hint bit or
         * lsn updates. We assume pd_lower/upper cannot be changed without an
         * exclusive lock, so the contents bkp are not racy.
         */
        if (buffer_std)
        {
            /* Assume we can omit data between pd_lower and pd_upper */
            Page        page = BufferGetPage(buffer);
            uint16      lower = ((PageHeader) page)->pd_lower;
            uint16      upper = ((PageHeader) page)->pd_upper;
 
            memcpy(copied_buffer.data, origdata, lower);
            memcpy(copied_buffer.data + upper, origdata + upper, BLCKSZ - upper);
        }
        else
            memcpy(copied_buffer.data, origdata, BLCKSZ);
 
        XLogBeginInsert();
 
        if (buffer_std)
            flags |= REGBUF_STANDARD;
 
        BufferGetTag(buffer, &rlocator, &forkno, &blkno);
        XLogRegisterBlock(0, &rlocator, forkno, blkno, copied_buffer.data, flags);
 
        recptr = XLogInsert(RM_XLOG_ID, XLOG_FPI_FOR_HINT);
    }
 
    return recptr;
}

References Assert(), BufferGetBlock(), BufferGetLSNAtomic(), BufferGetPage(), BufferGetTag(), PGAlignedBlock::data, DELAY_CHKPT_START, PGPROC::delayChkptFlags, GetRedoRecPtr(), InvalidXLogRecPtr, lower(), MyProc, RedoRecPtr, REGBUF_STANDARD, upper(), XLOG_FPI_FOR_HINT, XLogBeginInsert(), XLogInsert(), and XLogRegisterBlock().

Referenced by MarkBufferDirtyHint().

◆ XLogSetRecordFlags()

void XLogSetRecordFlags ( uint8 flags )

Definition at line 456 of file xloginsert.c.

{
    Assert(begininsert_called);
    curinsert_flags |= flags;
}

References Assert(), begininsert_called, and curinsert_flags.

Referenced by EndPrepare(), ExecuteTruncateGuts(), gistXLogAssignLSN(), heap_delete(), heap_finish_speculative(), heap_insert(), heap_multi_insert(), log_heap_update(), LogAccessExclusiveLocks(), LogCurrentRunningXacts(), LogLogicalMessage(), RequestXLogSwitch(), test_custom_rmgrs_insert_wal_record(), XactLogAbortRecord(), and XactLogCommitRecord().

Macros

Functions

Macro Definition Documentation

◆ REGBUF_FORCE_IMAGE

◆ REGBUF_KEEP_DATA

◆ REGBUF_NO_CHANGE

◆ REGBUF_NO_IMAGE

◆ REGBUF_STANDARD

◆ REGBUF_WILL_INIT

◆ XLR_NORMAL_MAX_BLOCK_ID

◆ XLR_NORMAL_RDATAS

Function Documentation

◆ InitXLogInsert()

◆ log_newpage()

◆ log_newpage_buffer()

◆ log_newpage_range()

◆ log_newpages()

◆ XLogBeginInsert()

◆ XLogCheckBufferNeedsBackup()

◆ XLogEnsureRecordSpace()

◆ XLogInsert()

◆ XLogRegisterBlock()

◆ XLogRegisterBufData()

◆ XLogRegisterBuffer()

◆ XLogRegisterData()

◆ XLogResetInsertion()

◆ XLogSaveBufferForHint()

◆ XLogSetRecordFlags()