* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Header: /cvsroot/pgsql/contrib/pg_resetxlog/Attic/pg_resetxlog.c,v 1.13 2002/01/10 20:09:06 momjian Exp $
+ * $Header: /cvsroot/pgsql/contrib/pg_resetxlog/Attic/pg_resetxlog.c,v 1.14 2002/01/10 23:40:58 momjian Exp $
*
*-------------------------------------------------------------------------
*/
(logSeg)++; \
} while (0)
-/*
- * Compute ID and segment from an XLogRecPtr.
- *
- * For XLByteToSeg, do the computation at face value. For XLByteToPrevSeg,
- * a boundary byte is taken to be in the previous segment. This is suitable
- * for deciding which segment to write given a pointer to a record end,
- * for example.
- */
-#define XLByteToSeg(xlrp, logId, logSeg) \
- ( logId = (xlrp).xlogid, \
- logSeg = (xlrp).xrecoff / XLogSegSize \
- )
-#define XLByteToPrevSeg(xlrp, logId, logSeg) \
- ( logId = (xlrp).xlogid, \
- logSeg = ((xlrp).xrecoff - 1) / XLogSegSize \
- )
-
-/*
- * Is an XLogRecPtr within a particular XLOG segment?
- *
- * For XLByteInSeg, do the computation at face value. For XLByteInPrevSeg,
- * a boundary byte is taken to be in the previous segment.
- */
-#define XLByteInSeg(xlrp, logId, logSeg) \
- ((xlrp).xlogid == (logId) && \
- (xlrp).xrecoff / XLogSegSize == (logSeg))
-
-#define XLByteInPrevSeg(xlrp, logId, logSeg) \
- ((xlrp).xlogid == (logId) && \
- ((xlrp).xrecoff - 1) / XLogSegSize == (logSeg))
-
-
#define XLogFileName(path, log, seg) \
snprintf(path, MAXPGPATH, "%s/%08X%08X", \
XLogDir, log, seg)
-/*
- * _INTL_MAXLOGRECSZ: max space needed for a record including header and
- * any backup-block data.
- */
-#define _INTL_MAXLOGRECSZ (SizeOfXLogRecord + MAXLOGRECSZ + \
- XLR_MAX_BKP_BLOCKS * (sizeof(BkpBlock) + BLCKSZ))
/******************** end of stuff copied from xlog.c ********************/
static bool guessed = false; /* T if we had to guess at any values */
-static bool CheckControlVersion0(char *buffer, int len);
-
-
-static int
-XLogFileOpen(uint32 log, uint32 seg)
-{
- char path[MAXPGPATH];
- int fd;
-
- XLogFileName(path, log, seg);
-
- fd = open(path, O_RDWR | PG_BINARY, S_IRUSR | S_IWUSR);
- return (fd);
-}
-
-
/*
* Try to read the existing pg_control file.
*
if (len >= sizeof(ControlFileData) &&
((ControlFileData *) buffer)->pg_control_version == PG_CONTROL_VERSION)
{
- /* Seems to be current version --- check the CRC. */
+ /* Check the CRC. */
INIT_CRC64(crc);
COMP_CRC64(crc,
buffer + sizeof(crc64),
return true;
}
- fprintf(stderr, "pg_control exists but has invalid CRC; proceed with caution.\n");
+ fprintf(stderr, "pg_control exists but has invalid CRC; proceeding with caution.\n");
/* We will use the data anyway, but treat it as guessed. */
memcpy(&ControlFile, buffer, sizeof(ControlFile));
guessed = true;
return true;
}
- /*
- * Maybe it's a 7.1beta pg_control.
- */
- if (CheckControlVersion0(buffer, len))
- return true;
-
/* Looks like it's a mess. */
fprintf(stderr, "pg_control exists but is broken or unknown version; ignoring it.\n");
return false;
}
-/******************* routines for old XLOG format *******************/
-
-
-/*
- * This format was in use in 7.1 beta releases through 7.1beta5. The
- * pg_control layout was different, and so were the XLOG page headers.
- * The XLOG record header format was physically the same as 7.1 release,
- * but interpretation of the xl_len field was not.
- */
-
-typedef struct crc64V0
-{
- uint32 crc1;
- uint32 crc2;
-} crc64V0;
-
-static uint32 crc_tableV0[] = {
- 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
- 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
- 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
- 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
- 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
- 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
- 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
- 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
- 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
- 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
- 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
- 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
- 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
- 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
- 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
- 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
- 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
- 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
- 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
- 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
- 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
- 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
- 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
- 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
- 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
- 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
- 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
- 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
- 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
- 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
- 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
- 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
- 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
- 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
- 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
- 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
- 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
- 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
- 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
- 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
- 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
- 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
- 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
-};
-
-#define INIT_CRC64V0(crc) ((crc).crc1 = 0xffffffff, (crc).crc2 = 0xffffffff)
-#define FIN_CRC64V0(crc) ((crc).crc1 ^= 0xffffffff, (crc).crc2 ^= 0xffffffff)
-#define COMP_CRC64V0(crc, data, len) \
-do {\
- uint32 __c1 = (crc).crc1;\
- uint32 __c2 = (crc).crc2;\
- char *__data = (char *) (data);\
- uint32 __len = (len);\
-\
- while (__len >= 2)\
- {\
- __c1 = crc_tableV0[(__c1 ^ *__data++) & 0xff] ^ (__c1 >> 8);\
- __c2 = crc_tableV0[(__c2 ^ *__data++) & 0xff] ^ (__c2 >> 8);\
- __len -= 2;\
- }\
- if (__len > 0)\
- __c1 = crc_tableV0[(__c1 ^ *__data++) & 0xff] ^ (__c1 >> 8);\
- (crc).crc1 = __c1;\
- (crc).crc2 = __c2;\
-} while (0)
-
-#define EQ_CRC64V0(c1,c2) ((c1).crc1 == (c2).crc1 && (c1).crc2 == (c2).crc2)
-
-
-#define LOCALE_NAME_BUFLEN_V0 128
-
-typedef struct ControlFileDataV0
-{
- crc64V0 crc;
- uint32 logId; /* current log file id */
- uint32 logSeg; /* current log file segment (1-based) */
- XLogRecPtr checkPoint; /* last check point record ptr */
- time_t time; /* time stamp of last modification */
- DBState state; /* see enum above */
- uint32 blcksz; /* block size for this DB */
- uint32 relseg_size; /* blocks per segment of large relation */
- uint32 catalog_version_no; /* internal version number */
- char lc_collate[LOCALE_NAME_BUFLEN_V0];
- char lc_ctype[LOCALE_NAME_BUFLEN_V0];
- char archdir[MAXPGPATH]; /* where to move offline log files */
-} ControlFileDataV0;
-
-typedef struct CheckPointV0
-{
- XLogRecPtr redo; /* next RecPtr available when we */
- /* began to create CheckPoint */
- /* (i.e. REDO start point) */
- XLogRecPtr undo; /* first record of oldest in-progress */
- /* transaction when we started */
- /* (i.e. UNDO end point) */
- StartUpID ThisStartUpID;
- TransactionId nextXid;
- Oid nextOid;
- bool Shutdown;
-} CheckPointV0;
-
-typedef struct XLogRecordV0
-{
- crc64V0 xl_crc;
- XLogRecPtr xl_prev; /* ptr to previous record in log */
- XLogRecPtr xl_xact_prev; /* ptr to previous record of this xact */
- TransactionId xl_xid; /* xact id */
- uint16 xl_len; /* total len of record *data* */
- uint8 xl_info;
- RmgrId xl_rmid; /* resource manager inserted this record */
-} XLogRecordV0;
-
-#define SizeOfXLogRecordV0 DOUBLEALIGN(sizeof(XLogRecordV0))
-
-typedef struct XLogContRecordV0
-{
- uint16 xl_len; /* len of data left */
-} XLogContRecordV0;
-
-#define SizeOfXLogContRecordV0 DOUBLEALIGN(sizeof(XLogContRecordV0))
-
-#define XLOG_PAGE_MAGIC_V0 0x17345168
-
-typedef struct XLogPageHeaderDataV0
-{
- uint32 xlp_magic;
- uint16 xlp_info;
-} XLogPageHeaderDataV0;
-
-#define SizeOfXLogPHDV0 DOUBLEALIGN(sizeof(XLogPageHeaderDataV0))
-
-typedef XLogPageHeaderDataV0 *XLogPageHeaderV0;
-
-
-static bool RecordIsValidV0(XLogRecordV0 * record);
-static XLogRecordV0 *ReadRecordV0(XLogRecPtr *RecPtr, char *buffer);
-static bool ValidXLOGHeaderV0(XLogPageHeaderV0 hdr);
-
-
-/*
- * Try to interpret pg_control contents as "version 0" format.
- */
-static bool
-CheckControlVersion0(char *buffer, int len)
-{
- crc64V0 crc;
- ControlFileDataV0 *oldfile;
- XLogRecordV0 *record;
- CheckPointV0 *oldchkpt;
-
- if (len < sizeof(ControlFileDataV0))
- return false;
- /* Check CRC the version-0 way. */
- INIT_CRC64V0(crc);
- COMP_CRC64V0(crc,
- buffer + sizeof(crc64V0),
- sizeof(ControlFileDataV0) - sizeof(crc64V0));
- FIN_CRC64V0(crc);
-
- if (!EQ_CRC64V0(crc, ((ControlFileDataV0 *) buffer)->crc))
- return false;
-
- /* Valid data, convert useful fields to new-style pg_control format */
- oldfile = (ControlFileDataV0 *) buffer;
-
- memset(&ControlFile, 0, sizeof(ControlFile));
-
- ControlFile.pg_control_version = PG_CONTROL_VERSION;
- ControlFile.catalog_version_no = oldfile->catalog_version_no;
-
- ControlFile.state = oldfile->state;
- ControlFile.logId = oldfile->logId;
- ControlFile.logSeg = oldfile->logSeg;
-
- ControlFile.blcksz = oldfile->blcksz;
- ControlFile.relseg_size = oldfile->relseg_size;
- strcpy(ControlFile.lc_collate, oldfile->lc_collate);
- strcpy(ControlFile.lc_ctype, oldfile->lc_ctype);
-
- /*
- * Since this format did not include a copy of the latest checkpoint
- * record, we have to go rooting in the old XLOG to get that.
- */
- record = ReadRecordV0(&oldfile->checkPoint,
- (char *) malloc(_INTL_MAXLOGRECSZ));
- if (record == NULL)
- {
- /*
- * We have to guess at the checkpoint contents.
- */
- guessed = true;
- ControlFile.checkPointCopy.ThisStartUpID = 0;
- ControlFile.checkPointCopy.nextXid = (TransactionId) 514; /* XXX */
- ControlFile.checkPointCopy.nextOid = BootstrapObjectIdData;
- return true;
- }
- oldchkpt = (CheckPointV0 *) XLogRecGetData(record);
-
- ControlFile.checkPointCopy.ThisStartUpID = oldchkpt->ThisStartUpID;
- ControlFile.checkPointCopy.nextXid = oldchkpt->nextXid;
- ControlFile.checkPointCopy.nextOid = oldchkpt->nextOid;
-
- return true;
-}
-
-/*
- * CRC-check an XLOG V0 record. We do not believe the contents of an XLOG
- * record (other than to the minimal extent of computing the amount of
- * data to read in) until we've checked the CRCs.
- *
- * We assume all of the record has been read into memory at *record.
- */
-static bool
-RecordIsValidV0(XLogRecordV0 * record)
-{
- crc64V0 crc;
- uint32 len = record->xl_len;
-
- /*
- * NB: this code is not right for V0 records containing backup blocks,
- * but for now it's only going to be applied to checkpoint records, so
- * I'm not going to worry about it...
- */
- INIT_CRC64V0(crc);
- COMP_CRC64V0(crc, XLogRecGetData(record), len);
- COMP_CRC64V0(crc, (char *) record + sizeof(crc64V0),
- SizeOfXLogRecordV0 - sizeof(crc64V0));
- FIN_CRC64V0(crc);
-
- if (!EQ_CRC64V0(record->xl_crc, crc))
- return false;
-
- return (true);
-}
-
-/*
- * Attempt to read an XLOG V0 record at recptr.
- *
- * If no valid record is available, returns NULL.
- *
- * buffer is a workspace at least _INTL_MAXLOGRECSZ bytes long. It is needed
- * to reassemble a record that crosses block boundaries. Note that on
- * successful return, the returned record pointer always points at buffer.
- */
-static XLogRecordV0 *
-ReadRecordV0(XLogRecPtr *RecPtr, char *buffer)
-{
- static int readFile = -1;
- static uint32 readId = 0;
- static uint32 readSeg = 0;
- static uint32 readOff = 0;
- static char *readBuf = NULL;
-
- XLogRecordV0 *record;
- uint32 len,
- total_len;
- uint32 targetPageOff;
-
- if (readBuf == NULL)
- readBuf = (char *) malloc(BLCKSZ);
-
- XLByteToSeg(*RecPtr, readId, readSeg);
- if (readFile < 0)
- {
- readFile = XLogFileOpen(readId, readSeg);
- if (readFile < 0)
- goto next_record_is_invalid;
- readOff = (uint32) (-1); /* force read to occur below */
- }
-
- targetPageOff = ((RecPtr->xrecoff % XLogSegSize) / BLCKSZ) * BLCKSZ;
- if (readOff != targetPageOff)
- {
- readOff = targetPageOff;
- if (lseek(readFile, (off_t) readOff, SEEK_SET) < 0)
- goto next_record_is_invalid;
- if (read(readFile, readBuf, BLCKSZ) != BLCKSZ)
- goto next_record_is_invalid;
- if (!ValidXLOGHeaderV0((XLogPageHeaderV0) readBuf))
- goto next_record_is_invalid;
- }
- if ((((XLogPageHeaderV0) readBuf)->xlp_info & XLP_FIRST_IS_CONTRECORD) &&
- RecPtr->xrecoff % BLCKSZ == SizeOfXLogPHDV0)
- goto next_record_is_invalid;
- record = (XLogRecordV0 *) ((char *) readBuf + RecPtr->xrecoff % BLCKSZ);
-
- if (record->xl_len == 0)
- goto next_record_is_invalid;
-
- /*
- * Compute total length of record including any appended backup
- * blocks.
- */
- total_len = SizeOfXLogRecordV0 + record->xl_len;
-
- /*
- * Make sure it will fit in buffer (currently, it is mechanically
- * impossible for this test to fail, but it seems like a good idea
- * anyway).
- */
- if (total_len > _INTL_MAXLOGRECSZ)
- goto next_record_is_invalid;
- len = BLCKSZ - RecPtr->xrecoff % BLCKSZ;
- if (total_len > len)
- {
- /* Need to reassemble record */
- XLogContRecordV0 *contrecord;
- uint32 gotlen = len;
-
- memcpy(buffer, record, len);
- record = (XLogRecordV0 *) buffer;
- buffer += len;
- for (;;)
- {
- readOff += BLCKSZ;
- if (readOff >= XLogSegSize)
- {
- close(readFile);
- readFile = -1;
- NextLogSeg(readId, readSeg);
- readFile = XLogFileOpen(readId, readSeg);
- if (readFile < 0)
- goto next_record_is_invalid;
- readOff = 0;
- }
- if (read(readFile, readBuf, BLCKSZ) != BLCKSZ)
- goto next_record_is_invalid;
- if (!ValidXLOGHeaderV0((XLogPageHeaderV0) readBuf))
- goto next_record_is_invalid;
- if (!(((XLogPageHeaderV0) readBuf)->xlp_info & XLP_FIRST_IS_CONTRECORD))
- goto next_record_is_invalid;
- contrecord = (XLogContRecordV0 *) ((char *) readBuf + SizeOfXLogPHDV0);
- if (contrecord->xl_len == 0 ||
- total_len != (contrecord->xl_len + gotlen))
- goto next_record_is_invalid;
- len = BLCKSZ - SizeOfXLogPHDV0 - SizeOfXLogContRecordV0;
- if (contrecord->xl_len > len)
- {
- memcpy(buffer, (char *) contrecord + SizeOfXLogContRecordV0, len);
- gotlen += len;
- buffer += len;
- continue;
- }
- memcpy(buffer, (char *) contrecord + SizeOfXLogContRecordV0,
- contrecord->xl_len);
- break;
- }
- if (!RecordIsValidV0(record))
- goto next_record_is_invalid;
- return record;
- }
-
- /* Record does not cross a page boundary */
- if (!RecordIsValidV0(record))
- goto next_record_is_invalid;
- memcpy(buffer, record, total_len);
- return (XLogRecordV0 *) buffer;
-
-next_record_is_invalid:;
- close(readFile);
- readFile = -1;
- return NULL;
-}
-
-/*
- * Check whether the xlog header of a page just read in looks valid.
- *
- * This is just a convenience subroutine to avoid duplicated code in
- * ReadRecord. It's not intended for use from anywhere else.
- */
-static bool
-ValidXLOGHeaderV0(XLogPageHeaderV0 hdr)
-{
- if (hdr->xlp_magic != XLOG_PAGE_MAGIC_V0)
- return false;
- if ((hdr->xlp_info & ~XLP_ALL_FLAGS) != 0)
- return false;
- return true;
-}
-
-/******************* end of routines for old XLOG format *******************/
-
-
/*
* Guess at pg_control values when we can't read the old ones.
*/
* reset by RewriteControlFile().
*/
static void
-PrintControlValues(void)
+PrintControlValues(bool guessed)
{
- printf("Guessed-at pg_control values:\n\n"
+ printf("\n%spg_control values:\n\n"
"pg_control version number: %u\n"
"Catalog version number: %u\n"
"Current log file id: %u\n"
"LC_COLLATE: %s\n"
"LC_CTYPE: %s\n",
+ (guessed ? "Guessed-at " : ""),
ControlFile.pg_control_version,
ControlFile.catalog_version_no,
ControlFile.logId,
*/
if ((guessed && !force) || noupdate)
{
- PrintControlValues();
+ PrintControlValues(guessed);
if (!noupdate)
printf("\nIf these values seem acceptable, use -f to force reset.\n");
exit(1);
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