diff options
Diffstat (limited to 'src/include/access/xlog.h')
| -rw-r--r-- | src/include/access/xlog.h | 108 |
1 files changed, 3 insertions, 105 deletions
diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h index 630a62d77a9..f2542d6fc71 100644 --- a/src/include/access/xlog.h +++ b/src/include/access/xlog.h @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.53 2004/07/19 02:47:13 tgl Exp $ + * $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.54 2004/07/21 22:31:25 tgl Exp $ */ #ifndef XLOG_H #define XLOG_H @@ -14,7 +14,7 @@ #include "access/rmgr.h" #include "access/transam.h" #include "access/xlogdefs.h" -#include "storage/bufmgr.h" +#include "storage/buf.h" #include "utils/pg_crc.h" @@ -76,107 +76,6 @@ typedef struct XLogRecord #define XLOG_NO_TRAN XLR_INFO_MASK /* - * Header info for a backup block appended to an XLOG record. - * - * Note that the backup block has its own CRC, and is not covered by - * the CRC of the XLOG record proper. Also note that we don't attempt - * to align either the BkpBlock struct or the block's data. - */ -typedef struct BkpBlock -{ - crc64 crc; - RelFileNode node; - BlockNumber block; -} BkpBlock; - -/* - * When there is not enough space on current page for whole record, we - * continue on the next page with continuation record. (However, the - * XLogRecord header will never be split across pages; if there's less than - * SizeOfXLogRecord space left at the end of a page, we just waste it.) - * - * Note that xl_rem_len includes backup-block data, unlike xl_len in the - * initial header. - */ -typedef struct XLogContRecord -{ - uint32 xl_rem_len; /* total len of remaining data for record */ - - /* ACTUAL LOG DATA FOLLOWS AT END OF STRUCT */ - -} XLogContRecord; - -#define SizeOfXLogContRecord MAXALIGN(sizeof(XLogContRecord)) - -/* - * Each page of XLOG file has a header like this: - */ -#define XLOG_PAGE_MAGIC 0xD05B /* can be used as WAL version indicator */ - -typedef struct XLogPageHeaderData -{ - uint16 xlp_magic; /* magic value for correctness checks */ - uint16 xlp_info; /* flag bits, see below */ - StartUpID xlp_sui; /* StartUpID of first record on page */ - XLogRecPtr xlp_pageaddr; /* XLOG address of this page */ -} XLogPageHeaderData; - -#define SizeOfXLogPHD MAXALIGN(sizeof(XLogPageHeaderData)) - -typedef XLogPageHeaderData *XLogPageHeader; - -/* When record crosses page boundary, set this flag in new page's header */ -#define XLP_FIRST_IS_CONTRECORD 0x0001 -/* All defined flag bits in xlp_info (used for validity checking of header) */ -#define XLP_ALL_FLAGS 0x0001 - -/* - * We break each logical log file (xlogid value) into segment files of the - * size indicated by XLOG_SEG_SIZE. One possible segment at the end of each - * log file is wasted, to ensure that we don't have problems representing - * last-byte-position-plus-1. - */ -#define XLogSegSize ((uint32) XLOG_SEG_SIZE) -#define XLogSegsPerFile (((uint32) 0xffffffff) / XLogSegSize) -#define XLogFileSize (XLogSegsPerFile * XLogSegSize) - -/* - * The first XLOG record in each segment file is always an XLOG_FILE_HEADER - * record. This record does nothing as far as XLOG replay is concerned, - * but it is useful for verifying that we haven't mixed up XLOG segment files. - * The body of an XLOG_FILE_HEADER record is a struct XLogFileHeaderData. - * Note: the xlogid/segno fields are really redundant with xlp_pageaddr in - * the page header, but we store them anyway as an extra check. - */ -typedef struct XLogFileHeaderData -{ - uint64 xlfhd_sysid; /* system identifier from pg_control */ - uint32 xlfhd_xlogid; /* logical log file # */ - uint32 xlfhd_segno; /* segment number within logical log file */ - uint32 xlfhd_seg_size; /* just as a cross-check */ -} XLogFileHeaderData; - -#define SizeOfXLogFHD MAXALIGN(sizeof(XLogFileHeaderData)) - - -/* - * Method table for resource managers. - * - * RmgrTable[] is indexed by RmgrId values (see rmgr.h). - */ -typedef struct RmgrData -{ - const char *rm_name; - void (*rm_redo) (XLogRecPtr lsn, XLogRecord *rptr); - void (*rm_undo) (XLogRecPtr lsn, XLogRecord *rptr); - void (*rm_desc) (char *buf, uint8 xl_info, char *rec); - void (*rm_startup) (void); - void (*rm_cleanup) (void); -} RmgrData; - -extern RmgrData RmgrTable[]; - -/*-------------------- * List of these structs is used to pass data to XLogInsert(). * * If buffer is valid then XLOG will check if buffer must be backed up @@ -188,7 +87,6 @@ extern RmgrData RmgrTable[]; * the XLOG record, since we assume it's present in the buffer. Therefore, * rmgr redo routines MUST pay attention to XLR_BKP_BLOCK_X to know what * is actually stored in the XLOG record. - *-------------------- */ typedef struct XLogRecData { @@ -198,7 +96,7 @@ typedef struct XLogRecData struct XLogRecData *next; } XLogRecData; -extern StartUpID ThisStartUpID; /* current SUI */ +extern TimeLineID ThisTimeLineID; /* current TLI */ extern bool InRecovery; extern XLogRecPtr MyLastRecPtr; extern bool MyXactMadeXLogEntry; |