diff options
Diffstat (limited to 'innobase/include/trx0sys.h')
| -rw-r--r-- | innobase/include/trx0sys.h | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/innobase/include/trx0sys.h b/innobase/include/trx0sys.h index a54a6424a4f..0005c4a1711 100644 --- a/innobase/include/trx0sys.h +++ b/innobase/include/trx0sys.h @@ -37,21 +37,35 @@ extern trx_sys_t* trx_sys; /* Doublewrite system */ extern trx_doublewrite_t* trx_doublewrite; +extern ibool trx_doublewrite_must_reset_space_ids; +extern ibool trx_sys_multiple_tablespace_format; /******************************************************************** -Creates the doublewrite buffer at a database start. The header of the +Creates the doublewrite buffer to a new InnoDB installation. The header of the doublewrite buffer is placed on the trx system header page. */ void trx_sys_create_doublewrite_buf(void); /*================================*/ /******************************************************************** -At a database startup uses a possible doublewrite buffer to restore +At a database startup initializes the doublewrite buffer memory structure if +we already have a doublewrite buffer created in the data files. If we are +upgrading to an InnoDB version which supports multiple tablespaces, then this +function performs the necessary update operations. If we are in a crash +recovery, this function uses a possible doublewrite buffer to restore half-written pages in the data files. */ void -trx_sys_doublewrite_restore_corrupt_pages(void); -/*===========================================*/ +trx_sys_doublewrite_init_or_restore_pages( +/*======================================*/ + ibool restore_corrupt_pages); +/******************************************************************** +Marks the trx sys header when we have successfully upgraded to the >= 4.1.x +multiple tablespace format. */ + +void +trx_sys_mark_upgraded_to_multiple_tablespaces(void); +/*===============================================*/ /******************************************************************** Determines if a page number is located inside the doublewrite buffer. */ @@ -354,8 +368,17 @@ this contains the same fields as TRX_SYS_MYSQL_LOG_INFO below */ sys header is half-written to disk, we still may be able to recover the information */ +#define TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED (24 + FSEG_HEADER_SIZE) + /* If this is not yet set to + .._N, we must reset the + doublewrite buffer, because + starting from 4.1.x the space + id of a data page is stored to + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_NO */ /*-------------------------------------------------------------*/ #define TRX_SYS_DOUBLEWRITE_MAGIC_N 536853855 +#define TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N 1783657386 + #define TRX_SYS_DOUBLEWRITE_BLOCK_SIZE FSP_EXTENT_SIZE |