static void
spgRedoPickSplit(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogPickSplit *xldata = (spgxlogPickSplit *) ptr;
SpGistInnerTuple innerTuple;
SpGistState state;
OffsetNumber *toDelete;
OffsetNumber *toInsert;
uint8 *leafPageSelect;
Buffer srcBuffer;
Buffer destBuffer;
Page page;
int bbi;
int i;
fillFakeState(&state, xldata->stateSrc);
ptr += MAXALIGN(sizeof(spgxlogPickSplit));
innerTuple = (SpGistInnerTuple) ptr;
ptr += innerTuple->size;
toDelete = (OffsetNumber *) ptr;
ptr += MAXALIGN(sizeof(OffsetNumber) * xldata->nDelete);
toInsert = (OffsetNumber *) ptr;
ptr += MAXALIGN(sizeof(OffsetNumber) * xldata->nInsert);
leafPageSelect = (uint8 *) ptr;
ptr += MAXALIGN(sizeof(uint8) * xldata->nInsert);
/* now ptr points to the list of leaf tuples */
/*
* It's a bit tricky to identify which pages have been handled as
* full-page images, so we explicitly count each referenced buffer.
*/
bbi = 0;
if (xldata->blknoSrc == SPGIST_HEAD_BLKNO)
{
/* when splitting root, we touch it only in the guise of new inner */
srcBuffer = InvalidBuffer;
}
else if (xldata->initSrc)
{
/* just re-init the source page */
srcBuffer = XLogReadBuffer(xldata->node, xldata->blknoSrc, true);
Assert(BufferIsValid(srcBuffer));
page = (Page) BufferGetPage(srcBuffer);
SpGistInitBuffer(srcBuffer, SPGIST_LEAF);
/* don't update LSN etc till we're done with it */
}
else
{
/* delete the specified tuples from source page */
if (!(record->xl_info & XLR_SET_BKP_BLOCK(bbi)))
{
srcBuffer = XLogReadBuffer(xldata->node, xldata->blknoSrc, false);
if (BufferIsValid(srcBuffer))
{
page = BufferGetPage(srcBuffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
/*
* We have it a bit easier here than in doPickSplit(),
* because we know the inner tuple's location already,
* so we can inject the correct redirection tuple now.
*/
if (!state.isBuild)
spgPageIndexMultiDelete(&state, page,
toDelete, xldata->nDelete,
SPGIST_REDIRECT,
SPGIST_PLACEHOLDER,
xldata->blknoInner,
xldata->offnumInner);
else
spgPageIndexMultiDelete(&state, page,
toDelete, xldata->nDelete,
SPGIST_PLACEHOLDER,
SPGIST_PLACEHOLDER,
InvalidBlockNumber,
InvalidOffsetNumber);
/* don't update LSN etc till we're done with it */
}
}
}
else
srcBuffer = InvalidBuffer;
bbi++;
}
/* try to access dest page if any */
if (xldata->blknoDest == InvalidBlockNumber)
{
destBuffer = InvalidBuffer;
}
else if (xldata->initDest)
{
/* just re-init the dest page */
destBuffer = XLogReadBuffer(xldata->node, xldata->blknoDest, true);
Assert(BufferIsValid(destBuffer));
page = (Page) BufferGetPage(destBuffer);
SpGistInitBuffer(destBuffer, SPGIST_LEAF);
/* don't update LSN etc till we're done with it */
}
else
{
if (!(record->xl_info & XLR_SET_BKP_BLOCK(bbi)))
destBuffer = XLogReadBuffer(xldata->node, xldata->blknoDest, false);
else
destBuffer = InvalidBuffer;
bbi++;
}
/* restore leaf tuples to src and/or dest page */
for (i = 0; i < xldata->nInsert; i++)
{
SpGistLeafTuple lt = (SpGistLeafTuple) ptr;
Buffer leafBuffer;
ptr += lt->size;
leafBuffer = leafPageSelect[i] ? destBuffer : srcBuffer;
if (!BufferIsValid(leafBuffer))
continue; /* no need to touch this page */
page = BufferGetPage(leafBuffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
addOrReplaceTuple(page, (Item) lt, lt->size, toInsert[i]);
}
}
/* Now update src and dest page LSNs */
if (BufferIsValid(srcBuffer))
{
page = BufferGetPage(srcBuffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(srcBuffer);
}
UnlockReleaseBuffer(srcBuffer);
}
if (BufferIsValid(destBuffer))
{
page = BufferGetPage(destBuffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(destBuffer);
}
UnlockReleaseBuffer(destBuffer);
}
/* restore new inner tuple */
if (!(record->xl_info & XLR_SET_BKP_BLOCK(bbi)))
{
Buffer buffer = XLogReadBuffer(xldata->node, xldata->blknoInner,
xldata->initInner);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (xldata->initInner)
SpGistInitBuffer(buffer, 0);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
addOrReplaceTuple(page, (Item) innerTuple, innerTuple->size,
xldata->offnumInner);
/* if inner is also parent, update link while we're here */
if (xldata->blknoInner == xldata->blknoParent)
{
SpGistInnerTuple parent;
parent = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(parent, xldata->nodeI,
xldata->blknoInner, xldata->offnumInner);
}
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
bbi++;
/* update parent downlink, unless we did it above */
if (xldata->blknoParent == InvalidBlockNumber)
{
/* no parent cause we split the root */
Assert(xldata->blknoInner == SPGIST_HEAD_BLKNO);
}
else if (xldata->blknoInner != xldata->blknoParent)
{
if (!(record->xl_info & XLR_SET_BKP_BLOCK(bbi)))
{
Buffer buffer = XLogReadBuffer(xldata->node, xldata->blknoParent, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
SpGistInnerTuple parent;
parent = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(parent, xldata->nodeI,
xldata->blknoInner, xldata->offnumInner);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
}
}
static void
spgRedoAddLeaf(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogAddLeaf *xldata = (spgxlogAddLeaf *) ptr;
SpGistLeafTuple leafTuple;
Buffer buffer;
Page page;
/* we assume this is adequately aligned */
ptr += sizeof(spgxlogAddLeaf);
leafTuple = (SpGistLeafTuple) ptr;
if (!(record->xl_info & XLR_BKP_BLOCK_1))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoLeaf,
xldata->newPage);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (xldata->newPage)
SpGistInitBuffer(buffer, SPGIST_LEAF);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
/* insert new tuple */
if (xldata->offnumLeaf != xldata->offnumHeadLeaf)
{
/* normal cases, tuple was added by SpGistPageAddNewItem */
addOrReplaceTuple(page, (Item) leafTuple, leafTuple->size,
xldata->offnumLeaf);
/* update head tuple's chain link if needed */
if (xldata->offnumHeadLeaf != InvalidOffsetNumber)
{
SpGistLeafTuple head;
head = (SpGistLeafTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumHeadLeaf));
Assert(head->nextOffset == leafTuple->nextOffset);
head->nextOffset = xldata->offnumLeaf;
}
}
else
{
/* replacing a DEAD tuple */
PageIndexTupleDelete(page, xldata->offnumLeaf);
if (PageAddItem(page,
(Item) leafTuple, leafTuple->size,
xldata->offnumLeaf, false, false) != xldata->offnumLeaf)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
leafTuple->size);
}
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
/* update parent downlink if necessary */
if (xldata->blknoParent != InvalidBlockNumber &&
!(record->xl_info & XLR_BKP_BLOCK_2))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoParent, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
SpGistInnerTuple tuple;
tuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(tuple, xldata->nodeI,
xldata->blknoLeaf, xldata->offnumLeaf);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
}
static void
spgRedoAddNode(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogAddNode *xldata = (spgxlogAddNode *) ptr;
SpGistInnerTuple innerTuple;
SpGistState state;
Buffer buffer;
Page page;
int bbi;
/* we assume this is adequately aligned */
ptr += sizeof(spgxlogAddNode);
innerTuple = (SpGistInnerTuple) ptr;
fillFakeState(&state, xldata->stateSrc);
if (xldata->blknoNew == InvalidBlockNumber)
{
/* update in place */
Assert(xldata->blknoParent == InvalidBlockNumber);
if (!(record->xl_info & XLR_BKP_BLOCK_1))
{
buffer = XLogReadBuffer(xldata->node, xldata->blkno, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
PageIndexTupleDelete(page, xldata->offnum);
if (PageAddItem(page, (Item) innerTuple, innerTuple->size,
xldata->offnum,
false, false) != xldata->offnum)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
innerTuple->size);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
}
else
{
/* Install new tuple first so redirect is valid */
if (!(record->xl_info & XLR_BKP_BLOCK_2))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoNew,
xldata->newPage);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (xldata->newPage)
SpGistInitBuffer(buffer, 0);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
addOrReplaceTuple(page, (Item) innerTuple,
innerTuple->size, xldata->offnumNew);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
/* Delete old tuple, replacing it with redirect or placeholder tuple */
if (!(record->xl_info & XLR_BKP_BLOCK_1))
{
buffer = XLogReadBuffer(xldata->node, xldata->blkno, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
SpGistDeadTuple dt;
if (state.isBuild)
dt = spgFormDeadTuple(&state, SPGIST_PLACEHOLDER,
InvalidBlockNumber,
InvalidOffsetNumber);
else
dt = spgFormDeadTuple(&state, SPGIST_REDIRECT,
xldata->blknoNew,
xldata->offnumNew);
PageIndexTupleDelete(page, xldata->offnum);
if (PageAddItem(page, (Item) dt, dt->size,
xldata->offnum,
false, false) != xldata->offnum)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
dt->size);
if (state.isBuild)
SpGistPageGetOpaque(page)->nPlaceholder++;
else
SpGistPageGetOpaque(page)->nRedirection++;
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
/*
* Update parent downlink. Since parent could be in either of the
* previous two buffers, it's a bit tricky to determine which BKP bit
* applies.
*/
if (xldata->blknoParent == xldata->blkno)
bbi = 0;
else if (xldata->blknoParent == xldata->blknoNew)
bbi = 1;
else
bbi = 2;
if (!(record->xl_info & XLR_SET_BKP_BLOCK(bbi)))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoParent, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
SpGistInnerTuple innerTuple;
innerTuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(innerTuple, xldata->nodeI,
xldata->blknoNew, xldata->offnumNew);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
}
}
static void
spgRedoSplitTuple(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogSplitTuple *xldata = (spgxlogSplitTuple *) ptr;
SpGistInnerTuple prefixTuple;
SpGistInnerTuple postfixTuple;
Buffer buffer;
Page page;
/* we assume this is adequately aligned */
ptr += sizeof(spgxlogSplitTuple);
prefixTuple = (SpGistInnerTuple) ptr;
ptr += prefixTuple->size;
postfixTuple = (SpGistInnerTuple) ptr;
/* insert postfix tuple first to avoid dangling link */
if (xldata->blknoPostfix != xldata->blknoPrefix &&
!(record->xl_info & XLR_BKP_BLOCK_2))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoPostfix,
xldata->newPage);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (xldata->newPage)
SpGistInitBuffer(buffer, 0);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
addOrReplaceTuple(page, (Item) postfixTuple,
postfixTuple->size, xldata->offnumPostfix);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
/* now handle the original page */
if (!(record->xl_info & XLR_BKP_BLOCK_1))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoPrefix, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
PageIndexTupleDelete(page, xldata->offnumPrefix);
if (PageAddItem(page, (Item) prefixTuple, prefixTuple->size,
xldata->offnumPrefix, false, false) != xldata->offnumPrefix)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
prefixTuple->size);
if (xldata->blknoPostfix == xldata->blknoPrefix)
addOrReplaceTuple(page, (Item) postfixTuple,
postfixTuple->size,
xldata->offnumPostfix);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
}
static void
spgRedoPickSplit(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogPickSplit *xldata = (spgxlogPickSplit *) ptr;
char *innerTuple;
SpGistInnerTupleData innerTupleHdr;
SpGistState state;
OffsetNumber *toDelete;
OffsetNumber *toInsert;
uint8 *leafPageSelect;
Buffer srcBuffer;
Buffer destBuffer;
Page srcPage;
Page destPage;
Buffer innerBuffer;
Page page;
int bbi;
int i;
XLogRedoAction action;
fillFakeState(&state, xldata->stateSrc);
ptr += SizeOfSpgxlogPickSplit;
toDelete = (OffsetNumber *) ptr;
ptr += sizeof(OffsetNumber) * xldata->nDelete;
toInsert = (OffsetNumber *) ptr;
ptr += sizeof(OffsetNumber) * xldata->nInsert;
leafPageSelect = (uint8 *) ptr;
ptr += sizeof(uint8) * xldata->nInsert;
innerTuple = ptr;
/* the inner tuple is unaligned, so make a copy to access its header */
memcpy(&innerTupleHdr, innerTuple, sizeof(SpGistInnerTupleData));
ptr += innerTupleHdr.size;
/* now ptr points to the list of leaf tuples */
/*
* It's a bit tricky to identify which pages have been handled as
* full-page images, so we explicitly count each referenced buffer.
*/
bbi = 0;
if (SpGistBlockIsRoot(xldata->blknoSrc))
{
/* when splitting root, we touch it only in the guise of new inner */
srcBuffer = InvalidBuffer;
srcPage = NULL;
}
else if (xldata->initSrc)
{
/* just re-init the source page */
srcBuffer = XLogReadBuffer(xldata->node, xldata->blknoSrc, true);
Assert(BufferIsValid(srcBuffer));
srcPage = (Page) BufferGetPage(srcBuffer);
SpGistInitBuffer(srcBuffer,
SPGIST_LEAF | (xldata->storesNulls ? SPGIST_NULLS : 0));
/* don't update LSN etc till we're done with it */
}
else
{
/*
* Delete the specified tuples from source page. (In case we're in
* Hot Standby, we need to hold lock on the page till we're done
* inserting leaf tuples and the new inner tuple, else the added
* redirect tuple will be a dangling link.)
*/
if (XLogReadBufferForRedo(lsn, record, bbi,
xldata->node, xldata->blknoSrc,
&srcBuffer) == BLK_NEEDS_REDO)
{
srcPage = BufferGetPage(srcBuffer);
/*
* We have it a bit easier here than in doPickSplit(), because we
* know the inner tuple's location already, so we can inject the
* correct redirection tuple now.
*/
if (!state.isBuild)
spgPageIndexMultiDelete(&state, srcPage,
toDelete, xldata->nDelete,
SPGIST_REDIRECT,
SPGIST_PLACEHOLDER,
xldata->blknoInner,
xldata->offnumInner);
else
spgPageIndexMultiDelete(&state, srcPage,
toDelete, xldata->nDelete,
SPGIST_PLACEHOLDER,
SPGIST_PLACEHOLDER,
InvalidBlockNumber,
InvalidOffsetNumber);
/* don't update LSN etc till we're done with it */
}
else
{
srcPage = NULL; /* don't do any page updates */
}
bbi++;
}
/* try to access dest page if any */
if (xldata->blknoDest == InvalidBlockNumber)
{
destBuffer = InvalidBuffer;
destPage = NULL;
}
else if (xldata->initDest)
{
/* just re-init the dest page */
destBuffer = XLogReadBuffer(xldata->node, xldata->blknoDest, true);
Assert(BufferIsValid(destBuffer));
destPage = (Page) BufferGetPage(destBuffer);
SpGistInitBuffer(destBuffer,
SPGIST_LEAF | (xldata->storesNulls ? SPGIST_NULLS : 0));
/* don't update LSN etc till we're done with it */
}
else
{
/*
* We could probably release the page lock immediately in the
* full-page-image case, but for safety let's hold it till later.
*/
if (XLogReadBufferForRedo(lsn, record, bbi,
xldata->node, xldata->blknoDest,
&destBuffer) == BLK_NEEDS_REDO)
{
destPage = (Page) BufferGetPage(destBuffer);
}
else
{
destPage = NULL; /* don't do any page updates */
}
bbi++;
}
/* restore leaf tuples to src and/or dest page */
for (i = 0; i < xldata->nInsert; i++)
{
char *leafTuple;
SpGistLeafTupleData leafTupleHdr;
/* the tuples are not aligned, so must copy to access the size field. */
leafTuple = ptr;
memcpy(&leafTupleHdr, leafTuple, sizeof(SpGistLeafTupleData));
ptr += leafTupleHdr.size;
page = leafPageSelect[i] ? destPage : srcPage;
if (page == NULL)
continue; /* no need to touch this page */
addOrReplaceTuple(page, (Item) leafTuple, leafTupleHdr.size,
toInsert[i]);
}
/* Now update src and dest page LSNs if needed */
if (srcPage != NULL)
{
PageSetLSN(srcPage, lsn);
MarkBufferDirty(srcBuffer);
}
if (destPage != NULL)
{
PageSetLSN(destPage, lsn);
MarkBufferDirty(destBuffer);
}
/* restore new inner tuple */
if (xldata->initInner)
{
innerBuffer = XLogReadBuffer(xldata->node, xldata->blknoInner, true);
SpGistInitBuffer(innerBuffer,
(xldata->storesNulls ? SPGIST_NULLS : 0));
action = BLK_NEEDS_REDO;
}
else
action = XLogReadBufferForRedo(lsn, record, bbi, xldata->node,
xldata->blknoInner, &innerBuffer);
if (action == BLK_NEEDS_REDO)
{
page = BufferGetPage(innerBuffer);
addOrReplaceTuple(page, (Item) innerTuple, innerTupleHdr.size,
xldata->offnumInner);
/* if inner is also parent, update link while we're here */
if (xldata->blknoInner == xldata->blknoParent)
{
SpGistInnerTuple parent;
parent = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(parent, xldata->nodeI,
xldata->blknoInner, xldata->offnumInner);
}
PageSetLSN(page, lsn);
MarkBufferDirty(innerBuffer);
}
if (BufferIsValid(innerBuffer))
UnlockReleaseBuffer(innerBuffer);
bbi++;
/*
* Now we can release the leaf-page locks. It's okay to do this before
* updating the parent downlink.
*/
if (BufferIsValid(srcBuffer))
UnlockReleaseBuffer(srcBuffer);
if (BufferIsValid(destBuffer))
UnlockReleaseBuffer(destBuffer);
/* update parent downlink, unless we did it above */
if (xldata->blknoParent == InvalidBlockNumber)
{
/* no parent cause we split the root */
Assert(SpGistBlockIsRoot(xldata->blknoInner));
}
else if (xldata->blknoInner != xldata->blknoParent)
{
Buffer parentBuffer;
if (XLogReadBufferForRedo(lsn, record, bbi,
xldata->node, xldata->blknoParent,
&parentBuffer) == BLK_NEEDS_REDO)
{
SpGistInnerTuple parent;
page = BufferGetPage(parentBuffer);
parent = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(parent, xldata->nodeI,
xldata->blknoInner, xldata->offnumInner);
PageSetLSN(page, lsn);
MarkBufferDirty(parentBuffer);
}
if (BufferIsValid(parentBuffer))
UnlockReleaseBuffer(parentBuffer);
}
}
static void
spgRedoMoveLeafs(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogMoveLeafs *xldata = (spgxlogMoveLeafs *) ptr;
SpGistState state;
OffsetNumber *toDelete;
OffsetNumber *toInsert;
int nInsert;
Buffer buffer;
Page page;
fillFakeState(&state, xldata->stateSrc);
nInsert = xldata->replaceDead ? 1 : xldata->nMoves + 1;
ptr += MAXALIGN(sizeof(spgxlogMoveLeafs));
toDelete = (OffsetNumber *) ptr;
ptr += MAXALIGN(sizeof(OffsetNumber) * xldata->nMoves);
toInsert = (OffsetNumber *) ptr;
ptr += MAXALIGN(sizeof(OffsetNumber) * nInsert);
/* now ptr points to the list of leaf tuples */
/* Insert tuples on the dest page (do first, so redirect is valid) */
if (!(record->xl_info & XLR_BKP_BLOCK_2))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoDst,
xldata->newPage);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (xldata->newPage)
SpGistInitBuffer(buffer, SPGIST_LEAF);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
int i;
for (i = 0; i < nInsert; i++)
{
SpGistLeafTuple lt = (SpGistLeafTuple) ptr;
addOrReplaceTuple(page, (Item) lt, lt->size, toInsert[i]);
ptr += lt->size;
}
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
/* Delete tuples from the source page, inserting a redirection pointer */
if (!(record->xl_info & XLR_BKP_BLOCK_1))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoSrc, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
spgPageIndexMultiDelete(&state, page, toDelete, xldata->nMoves,
state.isBuild ? SPGIST_PLACEHOLDER : SPGIST_REDIRECT,
SPGIST_PLACEHOLDER,
xldata->blknoDst,
toInsert[nInsert - 1]);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
/* And update the parent downlink */
if (!(record->xl_info & XLR_BKP_BLOCK_3))
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoParent, false);
if (BufferIsValid(buffer))
{
page = BufferGetPage(buffer);
if (!XLByteLE(lsn, PageGetLSN(page)))
{
SpGistInnerTuple tuple;
tuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(tuple, xldata->nodeI,
xldata->blknoDst, toInsert[nInsert - 1]);
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
}
UnlockReleaseBuffer(buffer);
}
}
}
static void
spgRedoSplitTuple(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogSplitTuple *xldata = (spgxlogSplitTuple *) ptr;
char *prefixTuple;
SpGistInnerTupleData prefixTupleHdr;
char *postfixTuple;
SpGistInnerTupleData postfixTupleHdr;
Buffer buffer;
Page page;
ptr += sizeof(spgxlogSplitTuple);
prefixTuple = ptr;
/* the prefix tuple is unaligned, so make a copy to access its header */
memcpy(&prefixTupleHdr, prefixTuple, sizeof(SpGistInnerTupleData));
ptr += prefixTupleHdr.size;
postfixTuple = ptr;
/* postfix tuple is also unaligned */
memcpy(&postfixTupleHdr, postfixTuple, sizeof(SpGistInnerTupleData));
/*
* In normal operation we would have both pages locked simultaneously; but
* in WAL replay it should be safe to update them one at a time, as long
* as we do it in the right order.
*/
/* insert postfix tuple first to avoid dangling link */
if (xldata->blknoPostfix != xldata->blknoPrefix)
{
XLogRedoAction action;
if (xldata->newPage)
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoPostfix, true);
/* SplitTuple is not used for nulls pages */
SpGistInitBuffer(buffer, 0);
action = BLK_NEEDS_REDO;
}
else
action = XLogReadBufferForRedo(lsn, record, 1,
xldata->node, xldata->blknoPostfix,
&buffer);
if (action == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
addOrReplaceTuple(page, (Item) postfixTuple,
postfixTupleHdr.size, xldata->offnumPostfix);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
/* now handle the original page */
if (XLogReadBufferForRedo(lsn, record, 0, xldata->node, xldata->blknoPrefix,
&buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
PageIndexTupleDelete(page, xldata->offnumPrefix);
if (PageAddItem(page, (Item) prefixTuple, prefixTupleHdr.size,
xldata->offnumPrefix, false, false) != xldata->offnumPrefix)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
prefixTupleHdr.size);
if (xldata->blknoPostfix == xldata->blknoPrefix)
addOrReplaceTuple(page, (Item) postfixTuple, postfixTupleHdr.size,
xldata->offnumPostfix);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
static void
spgRedoAddNode(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogAddNode *xldata = (spgxlogAddNode *) ptr;
char *innerTuple;
SpGistInnerTupleData innerTupleHdr;
SpGistState state;
Buffer buffer;
Page page;
int bbi;
XLogRedoAction action;
ptr += sizeof(spgxlogAddNode);
innerTuple = ptr;
/* the tuple is unaligned, so make a copy to access its header */
memcpy(&innerTupleHdr, innerTuple, sizeof(SpGistInnerTupleData));
fillFakeState(&state, xldata->stateSrc);
if (xldata->blknoNew == InvalidBlockNumber)
{
/* update in place */
Assert(xldata->blknoParent == InvalidBlockNumber);
if (XLogReadBufferForRedo(lsn, record, 0, xldata->node, xldata->blkno,
&buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
PageIndexTupleDelete(page, xldata->offnum);
if (PageAddItem(page, (Item) innerTuple, innerTupleHdr.size,
xldata->offnum, false, false) != xldata->offnum)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
innerTupleHdr.size);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
else
{
/*
* In normal operation we would have all three pages (source, dest,
* and parent) locked simultaneously; but in WAL replay it should be
* safe to update them one at a time, as long as we do it in the right
* order.
*
* The logic here depends on the assumption that blkno != blknoNew,
* else we can't tell which BKP bit goes with which page, and the LSN
* checks could go wrong too.
*/
Assert(xldata->blkno != xldata->blknoNew);
/* Install new tuple first so redirect is valid */
if (xldata->newPage)
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoNew, true);
/* AddNode is not used for nulls pages */
SpGistInitBuffer(buffer, 0);
action = BLK_NEEDS_REDO;
}
else
action = XLogReadBufferForRedo(lsn, record, 1,
xldata->node, xldata->blknoNew,
&buffer);
if (action == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
addOrReplaceTuple(page, (Item) innerTuple,
innerTupleHdr.size, xldata->offnumNew);
/*
* If parent is in this same page, don't advance LSN; doing so
* would fool us into not applying the parent downlink update
* below. We'll update the LSN when we fix the parent downlink.
*/
if (xldata->blknoParent != xldata->blknoNew)
{
PageSetLSN(page, lsn);
}
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
/* Delete old tuple, replacing it with redirect or placeholder tuple */
if (XLogReadBufferForRedo(lsn, record, 0, xldata->node, xldata->blkno,
&buffer) == BLK_NEEDS_REDO)
{
SpGistDeadTuple dt;
page = BufferGetPage(buffer);
if (state.isBuild)
dt = spgFormDeadTuple(&state, SPGIST_PLACEHOLDER,
InvalidBlockNumber,
InvalidOffsetNumber);
else
dt = spgFormDeadTuple(&state, SPGIST_REDIRECT,
xldata->blknoNew,
xldata->offnumNew);
PageIndexTupleDelete(page, xldata->offnum);
if (PageAddItem(page, (Item) dt, dt->size, xldata->offnum,
false, false) != xldata->offnum)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
dt->size);
if (state.isBuild)
SpGistPageGetOpaque(page)->nPlaceholder++;
else
SpGistPageGetOpaque(page)->nRedirection++;
/*
* If parent is in this same page, don't advance LSN; doing so
* would fool us into not applying the parent downlink update
* below. We'll update the LSN when we fix the parent downlink.
*/
if (xldata->blknoParent != xldata->blkno)
{
PageSetLSN(page, lsn);
}
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
/*
* Update parent downlink. Since parent could be in either of the
* previous two buffers, it's a bit tricky to determine which BKP bit
* applies.
*/
if (xldata->blknoParent == xldata->blkno)
bbi = 0;
else if (xldata->blknoParent == xldata->blknoNew)
bbi = 1;
else
bbi = 2;
if (record->xl_info & XLR_BKP_BLOCK(bbi))
{
if (bbi == 2) /* else we already did it */
(void) RestoreBackupBlock(lsn, record, bbi, false, false);
action = BLK_RESTORED;
buffer = InvalidBuffer;
}
else
{
action = XLogReadBufferForRedo(lsn, record, bbi, xldata->node,
xldata->blknoParent, &buffer);
Assert(action != BLK_RESTORED);
}
if (action == BLK_NEEDS_REDO)
{
SpGistInnerTuple innerTuple;
page = BufferGetPage(buffer);
innerTuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(innerTuple, xldata->nodeI,
xldata->blknoNew, xldata->offnumNew);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
}
static void
spgRedoMoveLeafs(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogMoveLeafs *xldata = (spgxlogMoveLeafs *) ptr;
SpGistState state;
OffsetNumber *toDelete;
OffsetNumber *toInsert;
int nInsert;
Buffer buffer;
Page page;
XLogRedoAction action;
fillFakeState(&state, xldata->stateSrc);
nInsert = xldata->replaceDead ? 1 : xldata->nMoves + 1;
ptr += SizeOfSpgxlogMoveLeafs;
toDelete = (OffsetNumber *) ptr;
ptr += sizeof(OffsetNumber) * xldata->nMoves;
toInsert = (OffsetNumber *) ptr;
ptr += sizeof(OffsetNumber) * nInsert;
/* now ptr points to the list of leaf tuples */
/*
* In normal operation we would have all three pages (source, dest, and
* parent) locked simultaneously; but in WAL replay it should be safe to
* update them one at a time, as long as we do it in the right order.
*/
/* Insert tuples on the dest page (do first, so redirect is valid) */
if (xldata->newPage)
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoDst, true);
SpGistInitBuffer(buffer,
SPGIST_LEAF | (xldata->storesNulls ? SPGIST_NULLS : 0));
action = BLK_NEEDS_REDO;
}
else
action = XLogReadBufferForRedo(lsn, record, 1,
xldata->node, xldata->blknoDst,
&buffer);
if (action == BLK_NEEDS_REDO)
{
int i;
page = BufferGetPage(buffer);
for (i = 0; i < nInsert; i++)
{
char *leafTuple;
SpGistLeafTupleData leafTupleHdr;
/*
* the tuples are not aligned, so must copy to access the size
* field.
*/
leafTuple = ptr;
memcpy(&leafTupleHdr, leafTuple, sizeof(SpGistLeafTupleData));
addOrReplaceTuple(page, (Item) leafTuple,
leafTupleHdr.size, toInsert[i]);
ptr += leafTupleHdr.size;
}
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
/* Delete tuples from the source page, inserting a redirection pointer */
if (XLogReadBufferForRedo(lsn, record, 0, xldata->node, xldata->blknoSrc,
&buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
spgPageIndexMultiDelete(&state, page, toDelete, xldata->nMoves,
state.isBuild ? SPGIST_PLACEHOLDER : SPGIST_REDIRECT,
SPGIST_PLACEHOLDER,
xldata->blknoDst,
toInsert[nInsert - 1]);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
/* And update the parent downlink */
if (XLogReadBufferForRedo(lsn, record, 2, xldata->node, xldata->blknoParent,
&buffer) == BLK_NEEDS_REDO)
{
SpGistInnerTuple tuple;
page = BufferGetPage(buffer);
tuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(tuple, xldata->nodeI,
xldata->blknoDst, toInsert[nInsert - 1]);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
static void
spgRedoAddLeaf(XLogRecPtr lsn, XLogRecord *record)
{
char *ptr = XLogRecGetData(record);
spgxlogAddLeaf *xldata = (spgxlogAddLeaf *) ptr;
char *leafTuple;
SpGistLeafTupleData leafTupleHdr;
Buffer buffer;
Page page;
XLogRedoAction action;
ptr += sizeof(spgxlogAddLeaf);
leafTuple = ptr;
/* the leaf tuple is unaligned, so make a copy to access its header */
memcpy(&leafTupleHdr, leafTuple, sizeof(SpGistLeafTupleData));
/*
* In normal operation we would have both current and parent pages locked
* simultaneously; but in WAL replay it should be safe to update the leaf
* page before updating the parent.
*/
if (xldata->newPage)
{
buffer = XLogReadBuffer(xldata->node, xldata->blknoLeaf, true);
SpGistInitBuffer(buffer,
SPGIST_LEAF | (xldata->storesNulls ? SPGIST_NULLS : 0));
action = BLK_NEEDS_REDO;
}
else
action = XLogReadBufferForRedo(lsn, record, 0,
xldata->node, xldata->blknoLeaf,
&buffer);
if (action == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
/* insert new tuple */
if (xldata->offnumLeaf != xldata->offnumHeadLeaf)
{
/* normal cases, tuple was added by SpGistPageAddNewItem */
addOrReplaceTuple(page, (Item) leafTuple, leafTupleHdr.size,
xldata->offnumLeaf);
/* update head tuple's chain link if needed */
if (xldata->offnumHeadLeaf != InvalidOffsetNumber)
{
SpGistLeafTuple head;
head = (SpGistLeafTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumHeadLeaf));
Assert(head->nextOffset == leafTupleHdr.nextOffset);
head->nextOffset = xldata->offnumLeaf;
}
}
else
{
/* replacing a DEAD tuple */
PageIndexTupleDelete(page, xldata->offnumLeaf);
if (PageAddItem(page, (Item) leafTuple, leafTupleHdr.size,
xldata->offnumLeaf, false, false) != xldata->offnumLeaf)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
leafTupleHdr.size);
}
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
/* update parent downlink if necessary */
if (xldata->blknoParent != InvalidBlockNumber)
{
if (XLogReadBufferForRedo(lsn, record, 1,
xldata->node, xldata->blknoParent,
&buffer) == BLK_NEEDS_REDO)
{
SpGistInnerTuple tuple;
page = BufferGetPage(buffer);
tuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(tuple, xldata->nodeI,
xldata->blknoLeaf, xldata->offnumLeaf);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
}
static void
spgRedoAddNode(XLogReaderState *record)
{
XLogRecPtr lsn = record->EndRecPtr;
char *ptr = XLogRecGetData(record);
spgxlogAddNode *xldata = (spgxlogAddNode *) ptr;
char *innerTuple;
SpGistInnerTupleData innerTupleHdr;
SpGistState state;
Buffer buffer;
Page page;
XLogRedoAction action;
ptr += sizeof(spgxlogAddNode);
innerTuple = ptr;
/* the tuple is unaligned, so make a copy to access its header */
memcpy(&innerTupleHdr, innerTuple, sizeof(SpGistInnerTupleData));
fillFakeState(&state, xldata->stateSrc);
if (!XLogRecHasBlockRef(record, 1))
{
/* update in place */
Assert(xldata->parentBlk == -1);
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
PageIndexTupleDelete(page, xldata->offnum);
if (PageAddItem(page, (Item) innerTuple, innerTupleHdr.size,
xldata->offnum,
false, false) != xldata->offnum)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
innerTupleHdr.size);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
else
{
BlockNumber blkno;
BlockNumber blknoNew;
XLogRecGetBlockTag(record, 0, NULL, NULL, &blkno);
XLogRecGetBlockTag(record, 1, NULL, NULL, &blknoNew);
/*
* In normal operation we would have all three pages (source, dest,
* and parent) locked simultaneously; but in WAL replay it should be
* safe to update them one at a time, as long as we do it in the right
* order. We must insert the new tuple before replacing the old tuple
* with the redirect tuple.
*/
/* Install new tuple first so redirect is valid */
if (xldata->newPage)
{
/* AddNode is not used for nulls pages */
buffer = XLogInitBufferForRedo(record, 1);
SpGistInitBuffer(buffer, 0);
action = BLK_NEEDS_REDO;
}
else
action = XLogReadBufferForRedo(record, 1, &buffer);
if (action == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
addOrReplaceTuple(page, (Item) innerTuple,
innerTupleHdr.size, xldata->offnumNew);
/*
* If parent is in this same page, update it now.
*/
if (xldata->parentBlk == 1)
{
SpGistInnerTuple parentTuple;
parentTuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(parentTuple, xldata->nodeI,
blknoNew, xldata->offnumNew);
}
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
/* Delete old tuple, replacing it with redirect or placeholder tuple */
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
SpGistDeadTuple dt;
page = BufferGetPage(buffer);
if (state.isBuild)
dt = spgFormDeadTuple(&state, SPGIST_PLACEHOLDER,
InvalidBlockNumber,
InvalidOffsetNumber);
else
dt = spgFormDeadTuple(&state, SPGIST_REDIRECT,
blknoNew,
xldata->offnumNew);
PageIndexTupleDelete(page, xldata->offnum);
if (PageAddItem(page, (Item) dt, dt->size,
xldata->offnum,
false, false) != xldata->offnum)
elog(ERROR, "failed to add item of size %u to SPGiST index page",
dt->size);
if (state.isBuild)
SpGistPageGetOpaque(page)->nPlaceholder++;
else
SpGistPageGetOpaque(page)->nRedirection++;
/*
* If parent is in this same page, update it now.
*/
if (xldata->parentBlk == 0)
{
SpGistInnerTuple parentTuple;
parentTuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(parentTuple, xldata->nodeI,
blknoNew, xldata->offnumNew);
}
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
/*
* Update parent downlink (if we didn't do it as part of the source or
* destination page update already).
*/
if (xldata->parentBlk == 2)
{
if (XLogReadBufferForRedo(record, 2, &buffer) == BLK_NEEDS_REDO)
{
SpGistInnerTuple parentTuple;
page = BufferGetPage(buffer);
parentTuple = (SpGistInnerTuple) PageGetItem(page,
PageGetItemId(page, xldata->offnumParent));
spgUpdateNodeLink(parentTuple, xldata->nodeI,
blknoNew, xldata->offnumNew);
PageSetLSN(page, lsn);
MarkBufferDirty(buffer);
}
if (BufferIsValid(buffer))
UnlockReleaseBuffer(buffer);
}
}
}