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pg_filedump.c
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/*
* pg_filedump.c - PostgreSQL file dump utility for dumping and
* formatting heap (data), index and control files.
*
* Copyright (c) 2002-2010 Red Hat, Inc.
* Copyright (c) 2011-2014, PostgreSQL Global Development Group
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original Author: Patrick Macdonald <[email protected]>
*/
#define WIN32
#include "pg_filedump.h"
#include "utils/pg_crc_tables.h"
/* checksum_impl.h uses Assert, which doesn't work outside the server */
#undef Assert
#define Assert(X)
#include "storage/checksum.h"
#include "storage/checksum_impl.h"
#undef printf
#undef fopen
#undef sprintf
#include <stdio.h>
/***
* Global variables for ease of use mostly
*/
/* File to dump or format */
static FILE *fp = NULL;
/* File name for display */
static char *fileName = NULL;
/* Cache for current block */
static char *buffer = NULL;
/* Current block size */
static unsigned int blockSize = 0;
/* Current block in file */
static unsigned int currentBlock = 0;
/* Offset of current block */
static unsigned int pageOffset = 0;
/* Number of bytes to format */
static unsigned int bytesToFormat = 0;
/* Block version number */
static unsigned int blockVersion = 0;
/***
* Function Prototypes
*/
static void DisplayOptions(unsigned int validOptions);
static unsigned int ConsumeOptions(int numOptions, char **options);
static int GetOptionValue(char *optionString);
static void FormatBlock(BlockNumber blkno);
static unsigned int GetBlockSize();
static unsigned int GetSpecialSectionType(Page page);
static bool IsBtreeMetaPage(Page page);
static void CreateDumpFileHeader(int numOptions, char **options);
static int FormatHeader(Page page, BlockNumber blkno);
static void FormatItemBlock(Page page);
static void FormatItem(unsigned int numBytes, unsigned int startIndex,
unsigned int formatAs);
static void FormatSpecial();
static void FormatControl();
static void FormatBinary(unsigned int numBytes, unsigned int startIndex);
static void DumpBinaryBlock();
static void DumpFileContents();
/* Send properly formed usage information to the user. */
static void
DisplayOptions(unsigned int validOptions)
{
if (validOptions == OPT_RC_COPYRIGHT)
printf
("\nVersion %s (for %s)"
"\nCopyright (c) 2002-2010 Red Hat, Inc."
"\nCopyright (c) 2011-2014, PostgreSQL Global Development Group\n",
FD_VERSION, FD_PG_VERSION);
printf
("\nUsage: pg_filedump [-abcdfhikxy] [-R startblock [endblock]] [-S blocksize] file\n\n"
"Display formatted contents of a PostgreSQL heap/index/control file\n"
"Defaults are: relative addressing, range of the entire file, block\n"
" size as listed on block 0 in the file\n\n"
"The following options are valid for heap and index files:\n"
" -a Display absolute addresses when formatting (Block header\n"
" information is always block relative)\n"
" -b Display binary block images within a range (Option will turn\n"
" off all formatting options)\n"
" -d Display formatted block content dump (Option will turn off\n"
" all other formatting options)\n"
" -f Display formatted block content dump along with interpretation\n"
" -h Display this information\n"
" -i Display interpreted item details\n"
" -k Verify block checksums\n"
" -R Display specific block ranges within the file (Blocks are\n"
" indexed from 0)\n" " [startblock]: block to start at\n"
" [endblock]: block to end at\n"
" A startblock without an endblock will format the single block\n"
" -S Force block size to [blocksize]\n"
" -x Force interpreted formatting of block items as index items\n"
" -y Force interpreted formatting of block items as heap items\n\n"
"The following options are valid for control files:\n"
" -c Interpret the file listed as a control file\n"
" -f Display formatted content dump along with interpretation\n"
" -S Force block size to [blocksize]\n"
"\nReport bugs to <[email protected]>\n");
}
/* Iterate through the provided options and set the option flags. */
/* An error will result in a positive rc and will force a display */
/* of the usage information. This routine returns enum */
/* optionReturnCode values. */
static unsigned int
ConsumeOptions(int numOptions, char **options)
{
unsigned int rc = OPT_RC_VALID;
unsigned int x;
unsigned int optionStringLength;
char *optionString;
char duplicateSwitch = 0x00;
for (x = 1; x < numOptions; x++)
{
optionString = options[x];
optionStringLength = strlen(optionString);
/* Range is a special case where we have to consume the next 1 or 2 */
/* parameters to mark the range start and end */
if ((optionStringLength == 2) && (strcmp(optionString, "-R") == 0))
{
int range = 0;
SET_OPTION(blockOptions, BLOCK_RANGE, 'R');
/* Only accept the range option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* Make sure there are options after the range identifier */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing range start identifier.\n");
break;
}
/*
* Mark that we have the range and advance the option to what
* should
*/
/* be the range start. Check the value of the next parameter */
optionString = options[++x];
if ((range = GetOptionValue(optionString)) < 0)
{
rc = OPT_RC_INVALID;
printf("Error: Invalid range start identifier <%s>.\n",
optionString);
break;
}
/* The default is to dump only one block */
blockStart = blockEnd = (unsigned int) range;
/* We have our range start marker, check if there is an end */
/* marker on the option line. Assume that the last option */
/* is the file we are dumping, so check if there are options */
/* range start marker and the file */
if (x <= (numOptions - 3))
{
if ((range = GetOptionValue(options[x + 1])) >= 0)
{
/* End range must be => start range */
if (blockStart <= range)
{
blockEnd = (unsigned int) range;
x++;
}
else
{
rc = OPT_RC_INVALID;
printf("Error: Requested block range start <%d> is "
"greater than end <%d>.\n", blockStart, range);
break;
}
}
}
}
/* Check for the special case where the user forces a block size */
/* instead of having the tool determine it. This is useful if */
/* the header of block 0 is corrupt and gives a garbage block size */
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-S") == 0))
{
int localBlockSize;
SET_OPTION(blockOptions, BLOCK_FORCED, 'S');
/* Only accept the forced size option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -S is the block size */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing block size identifier.\n");
break;
}
/* Next option encountered must be forced block size */
optionString = options[++x];
if ((localBlockSize = GetOptionValue(optionString)) > 0)
blockSize = (unsigned int) localBlockSize;
else
{
rc = OPT_RC_INVALID;
printf("Error: Invalid block size requested <%s>.\n",
optionString);
break;
}
}
/* The last option MUST be the file name */
else if (x == (numOptions - 1))
{
/* Check to see if this looks like an option string before opening */
if (optionString[0] != '-')
{
fp = fopen(optionString, "rb");
if (fp)
fileName = options[x];
else
{
rc = OPT_RC_FILE;
printf("Error: Could not open file <%s>.\n", optionString);
break;
}
}
else
{
/* Could be the case where the help flag is used without a */
/* filename. Otherwise, the last option isn't a file */
if (strcmp(optionString, "-h") == 0)
rc = OPT_RC_COPYRIGHT;
else
{
rc = OPT_RC_FILE;
printf("Error: Missing file name to dump.\n");
}
break;
}
}
else
{
unsigned int y;
/* Option strings must start with '-' and contain switches */
if (optionString[0] != '-')
{
rc = OPT_RC_INVALID;
printf("Error: Invalid option string <%s>.\n", optionString);
break;
}
/* Iterate through the singular option string, throw out */
/* garbage, duplicates and set flags to be used in formatting */
for (y = 1; y < optionStringLength; y++)
{
switch (optionString[y])
{
/* Use absolute addressing */
case 'a':
SET_OPTION(blockOptions, BLOCK_ABSOLUTE, 'a');
break;
/* Dump the binary contents of the page */
case 'b':
SET_OPTION(blockOptions, BLOCK_BINARY, 'b');
break;
/* Dump the listed file as a control file */
case 'c':
SET_OPTION(controlOptions, CONTROL_DUMP, 'c');
break;
/* Do not interpret the data. Format to hex and ascii. */
case 'd':
SET_OPTION(blockOptions, BLOCK_NO_INTR, 'd');
break;
/*
* Format the contents of the block with
* interpretation
*/
/* of the headers */
case 'f':
SET_OPTION(blockOptions, BLOCK_FORMAT, 'f');
break;
/* Display the usage screen */
case 'h':
rc = OPT_RC_COPYRIGHT;
break;
/* Format the items in detail */
case 'i':
SET_OPTION(itemOptions, ITEM_DETAIL, 'i');
break;
/* Verify block checksums */
case 'k':
SET_OPTION(blockOptions, BLOCK_CHECKSUMS, 'k');
break;
/* Interpret items as standard index values */
case 'x':
SET_OPTION(itemOptions, ITEM_INDEX, 'x');
if (itemOptions & ITEM_HEAP)
{
rc = OPT_RC_INVALID;
printf("Error: Options <y> and <x> are "
"mutually exclusive.\n");
}
break;
/* Interpret items as heap values */
case 'y':
SET_OPTION(itemOptions, ITEM_HEAP, 'y');
if (itemOptions & ITEM_INDEX)
{
rc = OPT_RC_INVALID;
printf("Error: Options <x> and <y> are "
"mutually exclusive.\n");
}
break;
default:
rc = OPT_RC_INVALID;
printf("Error: Unknown option <%c>.\n", optionString[y]);
break;
}
if (rc)
break;
}
}
}
if (rc == OPT_RC_DUPLICATE)
printf("Error: Duplicate option listed <%c>.\n", duplicateSwitch);
/* If the user requested a control file dump, a pure binary */
/* block dump or a non-interpreted formatted dump, mask off */
/* all other block level options (with a few exceptions) */
if (rc == OPT_RC_VALID)
{
/* The user has requested a control file dump, only -f and */
/* -S are valid... turn off all other formatting */
if (controlOptions & CONTROL_DUMP)
{
if ((blockOptions & ~(BLOCK_FORMAT | BLOCK_FORCED))
|| (itemOptions))
{
rc = OPT_RC_INVALID;
printf("Error: Invalid options used for Control File dump.\n"
" Only options <Sf> may be used with <c>.\n");
}
else
{
controlOptions |=
(blockOptions & (BLOCK_FORMAT | BLOCK_FORCED));
blockOptions = itemOptions = 0;
}
}
/* The user has requested a binary block dump... only -R and */
/* -f are honoured */
else if (blockOptions & BLOCK_BINARY)
{
blockOptions &= (BLOCK_BINARY | BLOCK_RANGE | BLOCK_FORCED);
itemOptions = 0;
}
/* The user has requested a non-interpreted dump... only -a, */
/* -R and -f are honoured */
else if (blockOptions & BLOCK_NO_INTR)
{
blockOptions &=
(BLOCK_NO_INTR | BLOCK_ABSOLUTE | BLOCK_RANGE | BLOCK_FORCED);
itemOptions = 0;
}
}
return (rc);
}
/* Given the index into the parameter list, convert and return the */
/* current string to a number if possible */
static int
GetOptionValue(char *optionString)
{
unsigned int x;
int value = -1;
int optionStringLength = strlen(optionString);
/* Verify the next option looks like a number */
for (x = 0; x < optionStringLength; x++)
if (!isdigit((int) optionString[x]))
break;
/* Convert the string to a number if it looks good */
if (x == optionStringLength)
value = atoi(optionString);
return (value);
}
/* Read the page header off of block 0 to determine the block size */
/* used in this file. Can be overridden using the -S option. The */
/* returned value is the block size of block 0 on disk */
static unsigned int
GetBlockSize()
{
unsigned int pageHeaderSize = sizeof(PageHeaderData);
unsigned int localSize = 0;
int bytesRead = 0;
char localCache[sizeof(PageHeaderData)];
/* Read the first header off of block 0 to determine the block size */
bytesRead = fread(&localCache, 1, pageHeaderSize, fp);
rewind(fp);
if (bytesRead == pageHeaderSize)
localSize = (unsigned int) PageGetPageSize(&localCache);
else
printf("Error: Unable to read full page header from block 0.\n"
" ===> Read %u bytes", bytesRead);
return (localSize);
}
/* Determine the contents of the special section on the block and */
/* return this enum value */
static unsigned int
GetSpecialSectionType(Page page)
{
unsigned int rc;
unsigned int specialOffset;
unsigned int specialSize;
unsigned int specialValue;
PageHeader pageHeader = (PageHeader) page;
/* If this is not a partial header, check the validity of the */
/* special section offset and contents */
if (bytesToFormat > sizeof(PageHeaderData))
{
specialOffset = (unsigned int) pageHeader->pd_special;
/* Check that the special offset can remain on the block or */
/* the partial block */
if ((specialOffset == 0) ||
(specialOffset > blockSize) || (specialOffset > bytesToFormat))
rc = SPEC_SECT_ERROR_BOUNDARY;
else
{
/* we may need to examine last 2 bytes of page to identify index */
uint16 *ptype = (uint16 *) (buffer + blockSize - sizeof(uint16));
specialSize = blockSize - specialOffset;
/* If there is a special section, use its size to guess its */
/* contents, checking the last 2 bytes of the page in cases */
/* that are ambiguous. Note we don't attempt to dereference */
/* the pointers without checking bytesToFormat == blockSize. */
if (specialSize == 0)
rc = SPEC_SECT_NONE;
else if (specialSize == MAXALIGN(sizeof(uint32)))
{
/* If MAXALIGN is 8, this could be either a sequence or */
/* SP-GiST or GIN. */
if (bytesToFormat == blockSize)
{
specialValue = *((int *) (buffer + specialOffset));
if (specialValue == SEQUENCE_MAGIC)
rc = SPEC_SECT_SEQUENCE;
else if (specialSize == MAXALIGN(sizeof(SpGistPageOpaqueData)) &&
*ptype == SPGIST_PAGE_ID)
rc = SPEC_SECT_INDEX_SPGIST;
else if (specialSize == MAXALIGN(sizeof(GinPageOpaqueData)))
rc = SPEC_SECT_INDEX_GIN;
else
rc = SPEC_SECT_ERROR_UNKNOWN;
}
else
rc = SPEC_SECT_ERROR_UNKNOWN;
}
/* SP-GiST and GIN have same size special section, so check */
/* the page ID bytes first. */
else if (specialSize == MAXALIGN(sizeof(SpGistPageOpaqueData)) &&
bytesToFormat == blockSize &&
*ptype == SPGIST_PAGE_ID)
rc = SPEC_SECT_INDEX_SPGIST;
else if (specialSize == MAXALIGN(sizeof(GinPageOpaqueData)))
rc = SPEC_SECT_INDEX_GIN;
else if (specialSize > 2 && bytesToFormat == blockSize)
{
/* As of 8.3, BTree, Hash, and GIST all have the same size */
/* special section, but the last two bytes of the section */
/* can be checked to determine what's what. */
if (*ptype <= MAX_BT_CYCLE_ID &&
specialSize == MAXALIGN(sizeof(BTPageOpaqueData)))
rc = SPEC_SECT_INDEX_BTREE;
else if (*ptype == HASHO_PAGE_ID &&
specialSize == MAXALIGN(sizeof(HashPageOpaqueData)))
rc = SPEC_SECT_INDEX_HASH;
else if (*ptype == GIST_PAGE_ID &&
specialSize == MAXALIGN(sizeof(GISTPageOpaqueData)))
rc = SPEC_SECT_INDEX_GIST;
else
rc = SPEC_SECT_ERROR_UNKNOWN;
}
else
rc = SPEC_SECT_ERROR_UNKNOWN;
}
}
else
rc = SPEC_SECT_ERROR_UNKNOWN;
return (rc);
}
/* Check whether page is a btree meta page */
static bool
IsBtreeMetaPage(Page page)
{
PageHeader pageHeader = (PageHeader) page;
if ((PageGetSpecialSize(page) == (MAXALIGN(sizeof(BTPageOpaqueData))))
&& (bytesToFormat == blockSize))
{
BTPageOpaque btpo =
(BTPageOpaque) ((char *) page + pageHeader->pd_special);
/* Must check the cycleid to be sure it's really btree. */
if ((btpo->btpo_cycleid <= MAX_BT_CYCLE_ID) &&
(btpo->btpo_flags & BTP_META))
return true;
}
return false;
}
/* Display a header for the dump so we know the file name, the options */
/* used and the time the dump was taken */
static void
CreateDumpFileHeader(int numOptions, char **options)
{
unsigned int x;
char optionBuffer[52] = "\0";
time_t rightNow = time(NULL);
/* Iterate through the options and cache them. */
/* The maximum we can display is 50 option characters + spaces. */
for (x = 1; x < (numOptions - 1); x++)
{
if ((strlen(optionBuffer) + strlen(options[x])) > 50)
break;
strcat(optionBuffer, options[x]);
strcat(optionBuffer, " ");
}
printf
("\n*******************************************************************\n"
"* PostgreSQL File/Block Formatted Dump Utility - Version %s\n"
"*\n"
"* File: %s\n"
"* Options used: %s\n*\n"
"* Dump created on: %s"
"*******************************************************************\n",
FD_VERSION, fileName, (strlen(optionBuffer)) ? optionBuffer : "None",
ctime(&rightNow));
}
/* Dump out a formatted block header for the requested block */
static int
FormatHeader(Page page, BlockNumber blkno)
{
int rc = 0;
unsigned int headerBytes;
PageHeader pageHeader = (PageHeader) page;
printf("<Header> -----\n");
/* Only attempt to format the header if the entire header (minus the item */
/* array) is available */
if (bytesToFormat < offsetof(PageHeaderData, pd_linp[0]))
{
headerBytes = bytesToFormat;
rc = EOF_ENCOUNTERED;
}
else
{
XLogRecPtr pageLSN = PageGetLSN(page);
int maxOffset = PageGetMaxOffsetNumber(page);
char flagString[100];
headerBytes = offsetof(PageHeaderData, pd_linp[0]);
blockVersion = (unsigned int) PageGetPageLayoutVersion(page);
/* The full header exists but we have to check that the item array */
/* is available or how far we can index into it */
if (maxOffset > 0)
{
unsigned int itemsLength = maxOffset * sizeof(ItemIdData);
if (bytesToFormat < (headerBytes + itemsLength))
{
headerBytes = bytesToFormat;
rc = EOF_ENCOUNTERED;
}
else
headerBytes += itemsLength;
}
flagString[0] = '\0';
if (pageHeader->pd_flags & PD_HAS_FREE_LINES)
strcat(flagString, "HAS_FREE_LINES|");
if (pageHeader->pd_flags & PD_PAGE_FULL)
strcat(flagString, "PAGE_FULL|");
if (pageHeader->pd_flags & PD_ALL_VISIBLE)
strcat(flagString, "ALL_VISIBLE|");
if (strlen(flagString))
flagString[strlen(flagString) - 1] = '\0';
/* Interpret the content of the header */
printf
(" Block Offset: 0x%08x Offsets: Lower %4u (0x%04hx)\n"
" Block: Size %4d Version %4u Upper %4u (0x%04hx)\n"
" LSN: logid %6d recoff 0x%08x Special %4u (0x%04hx)\n"
" Items: %4d Free Space: %4u\n"
" Checksum: 0x%04x Prune XID: 0x%08x Flags: 0x%04x (%s)\n"
" Length (including item array): %u\n\n",
pageOffset, pageHeader->pd_lower, pageHeader->pd_lower,
(int) PageGetPageSize(page), blockVersion,
pageHeader->pd_upper, pageHeader->pd_upper,
(uint32) (pageLSN >> 32), (uint32) pageLSN,
pageHeader->pd_special, pageHeader->pd_special,
maxOffset, pageHeader->pd_upper - pageHeader->pd_lower,
pageHeader->pd_checksum, pageHeader->pd_prune_xid,
pageHeader->pd_flags, flagString,
headerBytes);
/* If it's a btree meta page, print the contents of the meta block. */
if (IsBtreeMetaPage(page))
{
BTMetaPageData *btpMeta = BTPageGetMeta(buffer);
printf(" BTree Meta Data: Magic (0x%08x) Version (%u)\n"
" Root: Block (%u) Level (%u)\n"
" FastRoot: Block (%u) Level (%u)\n\n",
btpMeta->btm_magic, btpMeta->btm_version,
btpMeta->btm_root, btpMeta->btm_level,
btpMeta->btm_fastroot, btpMeta->btm_fastlevel);
headerBytes += sizeof(BTMetaPageData);
}
/* Eye the contents of the header and alert the user to possible */
/* problems. */
if ((maxOffset < 0) ||
(maxOffset > blockSize) ||
(blockVersion != PG_PAGE_LAYOUT_VERSION) || /* only one we support */
(pageHeader->pd_upper > blockSize) ||
(pageHeader->pd_upper > pageHeader->pd_special) ||
(pageHeader->pd_lower <
(sizeof(PageHeaderData) - sizeof(ItemIdData)))
|| (pageHeader->pd_lower > blockSize)
|| (pageHeader->pd_upper < pageHeader->pd_lower)
|| (pageHeader->pd_special > blockSize))
printf(" Error: Invalid header information.\n\n");
if (blockOptions & BLOCK_CHECKSUMS)
{
uint16 calc_checksum = pg_checksum_page(page, blkno);
if (calc_checksum != pageHeader->pd_checksum)
printf(" Error: checksum failure: calculated 0x%04x.\n\n",
calc_checksum);
}
}
/* If we have reached the end of file while interpreting the header, let */
/* the user know about it */
if (rc == EOF_ENCOUNTERED)
printf
(" Error: End of block encountered within the header."
" Bytes read: %4u.\n\n", bytesToFormat);
/* A request to dump the formatted binary of the block (header, */
/* items and special section). It's best to dump even on an error */
/* so the user can see the raw image. */
if (blockOptions & BLOCK_FORMAT)
FormatBinary(headerBytes, 0);
return (rc);
}
/* Dump out formatted items that reside on this block */
static void
FormatItemBlock(Page page)
{
unsigned int x;
unsigned int itemSize;
unsigned int itemOffset;
unsigned int itemFlags;
ItemId itemId;
int maxOffset = PageGetMaxOffsetNumber(page);
/* If it's a btree meta page, the meta block is where items would normally */
/* be; don't print garbage. */
if (IsBtreeMetaPage(page))
return;
printf("<Data> ------ \n");
/* Loop through the items on the block. Check if the block is */
/* empty and has a sensible item array listed before running */
/* through each item */
if (maxOffset == 0)
printf(" Empty block - no items listed \n\n");
else if ((maxOffset < 0) || (maxOffset > blockSize))
printf(" Error: Item index corrupt on block. Offset: <%d>.\n\n",
maxOffset);
else
{
int formatAs;
char textFlags[16];
/* First, honour requests to format items a special way, then */
/* use the special section to determine the format style */
if (itemOptions & ITEM_INDEX)
formatAs = ITEM_INDEX;
else if (itemOptions & ITEM_HEAP)
formatAs = ITEM_HEAP;
else
switch (specialType)
{
case SPEC_SECT_INDEX_BTREE:
case SPEC_SECT_INDEX_HASH:
case SPEC_SECT_INDEX_GIST:
case SPEC_SECT_INDEX_GIN:
formatAs = ITEM_INDEX;
break;
case SPEC_SECT_INDEX_SPGIST:
{
SpGistPageOpaque spgpo =
(SpGistPageOpaque) ((char *) page +
((PageHeader) page)->pd_special);
if (spgpo->flags & SPGIST_LEAF)
formatAs = ITEM_SPG_LEAF;
else
formatAs = ITEM_SPG_INNER;
}
break;
default:
formatAs = ITEM_HEAP;
break;
}
for (x = 1; x < (maxOffset + 1); x++)
{
itemId = PageGetItemId(page, x);
itemFlags = (unsigned int) ItemIdGetFlags(itemId);
itemSize = (unsigned int) ItemIdGetLength(itemId);
itemOffset = (unsigned int) ItemIdGetOffset(itemId);
switch (itemFlags)
{
case LP_UNUSED:
strcpy(textFlags, "UNUSED");
break;
case LP_NORMAL:
strcpy(textFlags, "NORMAL");
break;
case LP_REDIRECT:
strcpy(textFlags, "REDIRECT");
break;
case LP_DEAD:
strcpy(textFlags, "DEAD");
break;
default:
/* shouldn't be possible */
sprintf(textFlags, "0x%02x", itemFlags);
break;
}
printf(" Item %3u -- Length: %4u Offset: %4u (0x%04x)"
" Flags: %s\n", x, itemSize, itemOffset, itemOffset,
textFlags);
/* Make sure the item can physically fit on this block before */
/* formatting */
if ((itemOffset + itemSize > blockSize) ||
(itemOffset + itemSize > bytesToFormat))
printf(" Error: Item contents extend beyond block.\n"
" BlockSize<%d> Bytes Read<%d> Item Start<%d>.\n",
blockSize, bytesToFormat, itemOffset + itemSize);
else
{
/* If the user requests that the items be interpreted as */
/* heap or index items... */
if (itemOptions & ITEM_DETAIL)
FormatItem(itemSize, itemOffset, formatAs);
/* Dump the items contents in hex and ascii */
if (blockOptions & BLOCK_FORMAT)
FormatBinary(itemSize, itemOffset);
if (x == maxOffset)
printf("\n");
}
}
}
}
/* Interpret the contents of the item based on whether it has a special */
/* section and/or the user has hinted */
static void
FormatItem(unsigned int numBytes, unsigned int startIndex,
unsigned int formatAs)
{
static const char *const spgist_tupstates[4] = {
"LIVE",
"REDIRECT",
"DEAD",
"PLACEHOLDER"
};
if (formatAs == ITEM_INDEX)
{
/* It is an IndexTuple item, so dump the index header */
if (numBytes < SizeOfIptrData)
{
if (numBytes)
printf(" Error: This item does not look like an index item.\n");
}
else
{
IndexTuple itup = (IndexTuple) (&(buffer[startIndex]));
printf(" Block Id: %u linp Index: %u Size: %d\n"
" Has Nulls: %u Has Varwidths: %u\n\n",
((uint32) ((itup->t_tid.ip_blkid.bi_hi << 16) |
(uint16) itup->t_tid.ip_blkid.bi_lo)),
itup->t_tid.ip_posid,
(int) IndexTupleSize(itup),
IndexTupleHasNulls(itup) ? 1 : 0,
IndexTupleHasVarwidths(itup) ? 1 : 0);
if (numBytes != IndexTupleSize(itup))
printf(" Error: Item size difference. Given <%u>, "
"Internal <%d>.\n", numBytes, (int) IndexTupleSize(itup));
}
}
else if (formatAs == ITEM_SPG_INNER)
{
/* It is an SpGistInnerTuple item, so dump the index header */
if (numBytes < SGITHDRSZ)
{
if (numBytes)
printf(" Error: This item does not look like an SPGiST item.\n");
}
else
{
SpGistInnerTuple itup = (SpGistInnerTuple) (&(buffer[startIndex]));
printf(" State: %s allTheSame: %d nNodes: %u prefixSize: %u\n\n",
spgist_tupstates[itup->tupstate],
itup->allTheSame,
itup->nNodes,
itup->prefixSize);
if (numBytes != itup->size)
printf(" Error: Item size difference. Given <%u>, "
"Internal <%d>.\n", numBytes, (int) itup->size);
else if (itup->prefixSize == MAXALIGN(itup->prefixSize))
{
int i;
SpGistNodeTuple node;
/* Dump the prefix contents in hex and ascii */
if ((blockOptions & BLOCK_FORMAT) &&
SGITHDRSZ + itup->prefixSize <= numBytes)
FormatBinary(SGITHDRSZ + itup->prefixSize, startIndex);
/* Try to print the nodes, but only while pointer is sane */
SGITITERATE(itup, i, node)
{
int off = (char *) node - (char *) itup;
if (off + SGNTHDRSZ > numBytes)
break;
printf(" Node %2u: Downlink: %u/%u Size: %d Null: %u\n",
i,
((uint32) ((node->t_tid.ip_blkid.bi_hi << 16) |
(uint16) node->t_tid.ip_blkid.bi_lo)),
node->t_tid.ip_posid,
(int) IndexTupleSize(node),
IndexTupleHasNulls(node) ? 1 : 0);
/* Dump the node's contents in hex and ascii */
if ((blockOptions & BLOCK_FORMAT) &&
off + IndexTupleSize(node) <= numBytes)
FormatBinary(IndexTupleSize(node), startIndex + off);
if (IndexTupleSize(node) != MAXALIGN(IndexTupleSize(node)))
break;
}
}
printf("\n");
}
}
else if (formatAs == ITEM_SPG_LEAF)
{
/* It is an SpGistLeafTuple item, so dump the index header */
if (numBytes < SGLTHDRSZ)
{
if (numBytes)
printf(" Error: This item does not look like an SPGiST item.\n");
}
else
{
SpGistLeafTuple itup = (SpGistLeafTuple) (&(buffer[startIndex]));
printf(" State: %s nextOffset: %u Block Id: %u linp Index: %u\n\n",
spgist_tupstates[itup->tupstate],
itup->nextOffset,
((uint32) ((itup->heapPtr.ip_blkid.bi_hi << 16) |
(uint16) itup->heapPtr.ip_blkid.bi_lo)),
itup->heapPtr.ip_posid);
if (numBytes != itup->size)
printf(" Error: Item size difference. Given <%u>, "
"Internal <%d>.\n", numBytes, (int) itup->size);
}
}
else
{
/* It is a HeapTuple item, so dump the heap header */
int alignedSize = MAXALIGN(sizeof(HeapTupleHeaderData));
if (numBytes < alignedSize)
{
if (numBytes)
printf(" Error: This item does not look like a heap item.\n");
}
else
{
char flagString[256];
unsigned int x;
unsigned int bitmapLength = 0;
unsigned int oidLength = 0;
unsigned int computedLength;
unsigned int infoMask;
unsigned int infoMask2;
int localNatts;
unsigned int localHoff;
bits8 *localBits;
unsigned int localBitOffset;
HeapTupleHeader htup = (HeapTupleHeader) (&buffer[startIndex]);
infoMask = htup->t_infomask;
infoMask2 = htup->t_infomask2;
localBits = &(htup->t_bits[0]);
localNatts = HeapTupleHeaderGetNatts(htup);
localHoff = htup->t_hoff;
localBitOffset = offsetof(HeapTupleHeaderData, t_bits);
printf(" XMIN: %u XMAX: %u CID|XVAC: %u",
HeapTupleHeaderGetXmin(htup),
HeapTupleHeaderGetRawXmax(htup),
HeapTupleHeaderGetRawCommandId(htup));