diff options
Diffstat (limited to 'src/include/access/xlog_internal.h')
| -rw-r--r-- | src/include/access/xlog_internal.h | 35 |
1 files changed, 14 insertions, 21 deletions
diff --git a/src/include/access/xlog_internal.h b/src/include/access/xlog_internal.h index 50b4c2f3782..c3fcc8a6a5a 100644 --- a/src/include/access/xlog_internal.h +++ b/src/include/access/xlog_internal.h @@ -49,29 +49,9 @@ typedef struct BkpBlock } 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; that is, it tracks - * xl_tot_len not xl_len in the initial header. Also note that the - * continuation data isn't necessarily aligned. - */ -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 sizeof(XLogContRecord) - -/* * Each page of XLOG file has a header like this: */ -#define XLOG_PAGE_MAGIC 0xD072 /* can be used as WAL version indicator */ +#define XLOG_PAGE_MAGIC 0xD073 /* can be used as WAL version indicator */ typedef struct XLogPageHeaderData { @@ -79,6 +59,19 @@ typedef struct XLogPageHeaderData uint16 xlp_info; /* flag bits, see below */ TimeLineID xlp_tli; /* TimeLineID of first record on page */ XLogRecPtr xlp_pageaddr; /* XLOG address of this page */ + + /* + * When there is not enough space on current page for whole record, we + * continue on the next page. xlp_rem_len is the number of bytes + * remaining from a previous page. (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; that is, it tracks + * xl_tot_len not xl_len in the initial header. Also note that the + * continuation data isn't necessarily aligned. + */ + uint32 xlp_rem_len; /* total len of remaining data for record */ } XLogPageHeaderData; #define SizeOfXLogShortPHD MAXALIGN(sizeof(XLogPageHeaderData)) |