diff options
Diffstat (limited to 'storage/innobase/include/fil0fil.h')
| -rw-r--r-- | storage/innobase/include/fil0fil.h | 49 |
1 files changed, 35 insertions, 14 deletions
diff --git a/storage/innobase/include/fil0fil.h b/storage/innobase/include/fil0fil.h index aa1ec5c25a5..53bb496c190 100644 --- a/storage/innobase/include/fil0fil.h +++ b/storage/innobase/include/fil0fil.h @@ -63,7 +63,20 @@ extern fil_addr_t fil_addr_null; #define FIL_PAGE_LSN 16 /* lsn of the end of the newest modification log record to the page */ #define FIL_PAGE_TYPE 24 /* file page type: FIL_PAGE_INDEX,..., - 2 bytes */ + 2 bytes. + + The contents of this field can only + be trusted in the following case: + if the page is an uncompressed + B-tree index page, then it is + guaranteed that the value is + FIL_PAGE_INDEX. + The opposite does not hold. + + In tablespaces created by + MySQL/InnoDB 5.1.7 or later, the + contents of this field is valid + for all uncompressed pages. */ #define FIL_PAGE_FILE_FLUSH_LSN 26 /* this is only defined for the first page in a data file: the file has been flushed to disk at least up @@ -79,14 +92,22 @@ extern fil_addr_t fil_addr_null; to the last 4 bytes of FIL_PAGE_LSN */ #define FIL_PAGE_DATA_END 8 -/* File page types */ -#define FIL_PAGE_INDEX 17855 -#define FIL_PAGE_UNDO_LOG 2 -#define FIL_PAGE_INODE 3 -#define FIL_PAGE_IBUF_FREE_LIST 4 +/* File page types (values of FIL_PAGE_TYPE) */ +#define FIL_PAGE_INDEX 17855 /* B-tree node */ +#define FIL_PAGE_UNDO_LOG 2 /* Undo log page */ +#define FIL_PAGE_INODE 3 /* Index node */ +#define FIL_PAGE_IBUF_FREE_LIST 4 /* Insert buffer free list */ +/* File page types introduced in MySQL/InnoDB 5.1.7 */ +#define FIL_PAGE_TYPE_ALLOCATED 0 /* Freshly allocated page */ +#define FIL_PAGE_IBUF_BITMAP 5 /* Insert buffer bitmap */ +#define FIL_PAGE_TYPE_SYS 6 /* System page */ +#define FIL_PAGE_TYPE_TRX_SYS 7 /* Transaction system data */ +#define FIL_PAGE_TYPE_FSP_HDR 8 /* File space header */ +#define FIL_PAGE_TYPE_XDES 9 /* Extent descriptor page */ +#define FIL_PAGE_TYPE_BLOB 10 /* Uncompressed BLOB page */ /* Space types */ -#define FIL_TABLESPACE 501 +#define FIL_TABLESPACE 501 #define FIL_LOG 502 extern ulint fil_n_log_flushes; @@ -271,7 +292,7 @@ Decrements the count of pending insert buffer page merges. */ void fil_decr_pending_ibuf_merges( -/*========================*/ +/*=========================*/ ulint id); /* in: space id */ /*********************************************************************** Parses the body of a log record written about an .ibd file operation. That is, @@ -289,13 +310,13 @@ datadir that we should use in replaying the file operations. */ byte* fil_op_log_parse_or_replay( /*=======================*/ - /* out: end of log record, or NULL if the + /* out: end of log record, or NULL if the record was not completely contained between ptr and end_ptr */ - byte* ptr, /* in: buffer containing the log record body, + byte* ptr, /* in: buffer containing the log record body, or an initial segment of it, if the record does not fir completely between ptr and end_ptr */ - byte* end_ptr, /* in: buffer end */ + byte* end_ptr, /* in: buffer end */ ulint type, /* in: the type of this log record */ ibool do_replay, /* in: TRUE if we want to replay the operation, and not just parse the log record */ @@ -619,7 +640,7 @@ void fil_aio_wait( /*=========*/ ulint segment); /* in: the number of the segment in the aio - array to wait for */ + array to wait for */ /************************************************************************** Flushes to disk possible writes cached by the OS. If the space does not exist or is being dropped, does not do anything. */ @@ -665,7 +686,7 @@ Sets the file page type. */ void fil_page_set_type( /*==============*/ - byte* page, /* in: file page */ + byte* page, /* in: file page */ ulint type); /* in: type */ /************************************************************************* Gets the file page type. */ @@ -675,7 +696,7 @@ fil_page_get_type( /*==============*/ /* out: type; NOTE that if the type has not been written to page, the return value not defined */ - byte* page); /* in: file page */ + byte* page); /* in: file page */ typedef struct fil_space_struct fil_space_t; |