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authorunknown <heikki@donna.mysql.fi>2001-08-04 19:36:14 +0300
committerunknown <heikki@donna.mysql.fi>2001-08-04 19:36:14 +0300
commitc67510f0939fbcad4f2f0efcc79272322d5ffa57 (patch)
treee6dc89cb458f496f2b93e907afb60d3cd886cc18 /innobase/include/trx0sys.h
parentee82985a98c2c302e54a81ef586ffc8a867a550c (diff)
downloadmariadb-git-c67510f0939fbcad4f2f0efcc79272322d5ffa57.tar.gz
srv0srv.h Support raw disk partitions as data files
srv0start.c Support raw disk partitions as data files srv0srv.c Support raw disk partitions as data files row0purge.c < 4 GB rows, doublewrite, hang fixes row0row.c < 4 GB rows, doublewrite, hang fixes row0sel.c < 4 GB rows, doublewrite, hang fixes row0uins.c < 4 GB rows, doublewrite, hang fixes row0umod.c < 4 GB rows, doublewrite, hang fixes row0undo.c < 4 GB rows, doublewrite, hang fixes row0upd.c < 4 GB rows, doublewrite, hang fixes srv0srv.c < 4 GB rows, doublewrite, hang fixes srv0start.c < 4 GB rows, doublewrite, hang fixes sync0rw.c < 4 GB rows, doublewrite, hang fixes sync0sync.c < 4 GB rows, doublewrite, hang fixes trx0purge.c < 4 GB rows, doublewrite, hang fixes trx0rec.c < 4 GB rows, doublewrite, hang fixes trx0sys.c < 4 GB rows, doublewrite, hang fixes btr0btr.c < 4 GB rows, doublewrite, hang fixes btr0cur.c < 4 GB rows, doublewrite, hang fixes buf0buf.c < 4 GB rows, doublewrite, hang fixes buf0flu.c < 4 GB rows, doublewrite, hang fixes buf0rea.c < 4 GB rows, doublewrite, hang fixes data0data.c < 4 GB rows, doublewrite, hang fixes fil0fil.c < 4 GB rows, doublewrite, hang fixes fsp0fsp.c < 4 GB rows, doublewrite, hang fixes ibuf0ibuf.c < 4 GB rows, doublewrite, hang fixes lock0lock.c < 4 GB rows, doublewrite, hang fixes log0log.c < 4 GB rows, doublewrite, hang fixes log0recv.c < 4 GB rows, doublewrite, hang fixes os0file.c < 4 GB rows, doublewrite, hang fixes page0cur.c < 4 GB rows, doublewrite, hang fixes pars0pars.c < 4 GB rows, doublewrite, hang fixes rem0cmp.c < 4 GB rows, doublewrite, hang fixes rem0rec.c < 4 GB rows, doublewrite, hang fixes row0ins.c < 4 GB rows, doublewrite, hang fixes row0mysql.c < 4 GB rows, doublewrite, hang fixes univ.i < 4 GB rows, doublewrite, hang fixes data0data.ic < 4 GB rows, doublewrite, hang fixes mach0data.ic < 4 GB rows, doublewrite, hang fixes rem0rec.ic < 4 GB rows, doublewrite, hang fixes row0upd.ic < 4 GB rows, doublewrite, hang fixes trx0rec.ic < 4 GB rows, doublewrite, hang fixes rem0cmp.h < 4 GB rows, doublewrite, hang fixes rem0rec.h < 4 GB rows, doublewrite, hang fixes row0ins.h < 4 GB rows, doublewrite, hang fixes row0mysql.h < 4 GB rows, doublewrite, hang fixes row0row.h < 4 GB rows, doublewrite, hang fixes row0upd.h < 4 GB rows, doublewrite, hang fixes srv0srv.h < 4 GB rows, doublewrite, hang fixes sync0sync.h < 4 GB rows, doublewrite, hang fixes trx0rec.h < 4 GB rows, doublewrite, hang fixes trx0sys.h < 4 GB rows, doublewrite, hang fixes trx0types.h < 4 GB rows, doublewrite, hang fixes trx0undo.h < 4 GB rows, doublewrite, hang fixes ut0dbg.h < 4 GB rows, doublewrite, hang fixes ut0ut.h < 4 GB rows, doublewrite, hang fixes btr0btr.h < 4 GB rows, doublewrite, hang fixes btr0cur.h < 4 GB rows, doublewrite, hang fixes buf0buf.h < 4 GB rows, doublewrite, hang fixes buf0flu.h < 4 GB rows, doublewrite, hang fixes data0data.h < 4 GB rows, doublewrite, hang fixes dict0mem.h < 4 GB rows, doublewrite, hang fixes fil0fil.h < 4 GB rows, doublewrite, hang fixes fsp0fsp.h < 4 GB rows, doublewrite, hang fixes os0file.h < 4 GB rows, doublewrite, hang fixes innobase/include/btr0btr.h: < 4 GB rows, doublewrite, hang fixes innobase/include/btr0cur.h: < 4 GB rows, doublewrite, hang fixes innobase/include/buf0buf.h: < 4 GB rows, doublewrite, hang fixes innobase/include/buf0flu.h: < 4 GB rows, doublewrite, hang fixes innobase/include/data0data.h: < 4 GB rows, doublewrite, hang fixes innobase/include/dict0mem.h: < 4 GB rows, doublewrite, hang fixes innobase/include/fil0fil.h: < 4 GB rows, doublewrite, hang fixes innobase/include/fsp0fsp.h: < 4 GB rows, doublewrite, hang fixes innobase/include/os0file.h: < 4 GB rows, doublewrite, hang fixes innobase/include/rem0cmp.h: < 4 GB rows, doublewrite, hang fixes innobase/include/rem0rec.h: < 4 GB rows, doublewrite, hang fixes innobase/include/row0ins.h: < 4 GB rows, doublewrite, hang fixes innobase/include/row0mysql.h: < 4 GB rows, doublewrite, hang fixes innobase/include/row0row.h: < 4 GB rows, doublewrite, hang fixes innobase/include/row0upd.h: < 4 GB rows, doublewrite, hang fixes innobase/include/sync0sync.h: < 4 GB rows, doublewrite, hang fixes innobase/include/trx0rec.h: < 4 GB rows, doublewrite, hang fixes innobase/include/trx0sys.h: < 4 GB rows, doublewrite, hang fixes innobase/include/trx0types.h: < 4 GB rows, doublewrite, hang fixes innobase/include/trx0undo.h: < 4 GB rows, doublewrite, hang fixes innobase/include/ut0dbg.h: < 4 GB rows, doublewrite, hang fixes innobase/include/ut0ut.h: < 4 GB rows, doublewrite, hang fixes innobase/include/data0data.ic: < 4 GB rows, doublewrite, hang fixes innobase/include/mach0data.ic: < 4 GB rows, doublewrite, hang fixes innobase/include/rem0rec.ic: < 4 GB rows, doublewrite, hang fixes innobase/include/row0upd.ic: < 4 GB rows, doublewrite, hang fixes innobase/include/trx0rec.ic: < 4 GB rows, doublewrite, hang fixes innobase/include/univ.i: < 4 GB rows, doublewrite, hang fixes innobase/btr/btr0btr.c: < 4 GB rows, doublewrite, hang fixes innobase/btr/btr0cur.c: < 4 GB rows, doublewrite, hang fixes innobase/buf/buf0buf.c: < 4 GB rows, doublewrite, hang fixes innobase/buf/buf0flu.c: < 4 GB rows, doublewrite, hang fixes innobase/buf/buf0rea.c: < 4 GB rows, doublewrite, hang fixes innobase/data/data0data.c: < 4 GB rows, doublewrite, hang fixes innobase/fil/fil0fil.c: < 4 GB rows, doublewrite, hang fixes innobase/fsp/fsp0fsp.c: < 4 GB rows, doublewrite, hang fixes innobase/ibuf/ibuf0ibuf.c: < 4 GB rows, doublewrite, hang fixes innobase/lock/lock0lock.c: < 4 GB rows, doublewrite, hang fixes innobase/log/log0log.c: < 4 GB rows, doublewrite, hang fixes innobase/log/log0recv.c: < 4 GB rows, doublewrite, hang fixes innobase/os/os0file.c: < 4 GB rows, doublewrite, hang fixes innobase/page/page0cur.c: < 4 GB rows, doublewrite, hang fixes innobase/pars/pars0pars.c: < 4 GB rows, doublewrite, hang fixes innobase/rem/rem0cmp.c: < 4 GB rows, doublewrite, hang fixes innobase/rem/rem0rec.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0ins.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0mysql.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0purge.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0row.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0sel.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0uins.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0umod.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0undo.c: < 4 GB rows, doublewrite, hang fixes innobase/row/row0upd.c: < 4 GB rows, doublewrite, hang fixes innobase/sync/sync0rw.c: < 4 GB rows, doublewrite, hang fixes innobase/sync/sync0sync.c: < 4 GB rows, doublewrite, hang fixes innobase/trx/trx0purge.c: < 4 GB rows, doublewrite, hang fixes innobase/trx/trx0rec.c: < 4 GB rows, doublewrite, hang fixes innobase/trx/trx0sys.c: < 4 GB rows, doublewrite, hang fixes innobase/srv/srv0srv.c: Support raw disk partitions as data files innobase/srv/srv0start.c: Support raw disk partitions as data files innobase/include/srv0srv.h: Support raw disk partitions as data files
Diffstat (limited to 'innobase/include/trx0sys.h')
-rw-r--r--innobase/include/trx0sys.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/innobase/include/trx0sys.h b/innobase/include/trx0sys.h
index d0506dd65b7..e26f7e19850 100644
--- a/innobase/include/trx0sys.h
+++ b/innobase/include/trx0sys.h
@@ -27,6 +27,23 @@ Created 3/26/1996 Heikki Tuuri
/* The transaction system */
extern trx_sys_t* trx_sys;
+/* Doublewrite system */
+extern trx_doublewrite_t* trx_doublewrite;
+
+/********************************************************************
+Creates the doublewrite buffer at a database start. 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
+half-written pages in the data files. */
+
+void
+trx_sys_doublewrite_restore_corrupt_pages(void);
+/*===========================================*/
/*******************************************************************
Checks if a page address is the trx sys header page. */
UNIV_INLINE
@@ -235,6 +252,59 @@ therefore 256 */
segment specification slots */
/*-------------------------------------------------------------*/
+/* The offset of the doublewrite buffer header on the trx system header page */
+#define TRX_SYS_DOUBLEWRITE (UNIV_PAGE_SIZE - 200)
+/*-------------------------------------------------------------*/
+#define TRX_SYS_DOUBLEWRITE_FSEG 0 /* fseg header of the fseg
+ containing the doublewrite
+ buffer */
+#define TRX_SYS_DOUBLEWRITE_MAGIC FSEG_HEADER_SIZE
+ /* 4-byte magic number which
+ shows if we already have
+ created the doublewrite
+ buffer */
+#define TRX_SYS_DOUBLEWRITE_BLOCK1 (4 + FSEG_HEADER_SIZE)
+ /* page number of the
+ first page in the first
+ sequence of 64
+ (= FSP_EXTENT_SIZE) consecutive
+ pages in the doublewrite
+ buffer */
+#define TRX_SYS_DOUBLEWRITE_BLOCK2 (8 + FSEG_HEADER_SIZE)
+ /* page number of the
+ first page in the second
+ sequence of 64 consecutive
+ pages in the doublewrite
+ buffer */
+#define TRX_SYS_DOUBLEWRITE_REPEAT 12 /* we repeat the above 3
+ numbers so that if the trx
+ sys header is half-written
+ to disk, we still may be able
+ to recover the information */
+/*-------------------------------------------------------------*/
+#define TRX_SYS_DOUBLEWRITE_MAGIC_N 536853855
+
+#define TRX_SYS_DOUBLEWRITE_BLOCK_SIZE FSP_EXTENT_SIZE
+
+/* Doublewrite control struct */
+struct trx_doublewrite_struct{
+ mutex_t mutex; /* mutex protecting the first_free field and
+ write_buf */
+ ulint block1; /* the page number of the first
+ doublewrite block (64 pages) */
+ ulint block2; /* page number of the second block */
+ ulint first_free; /* first free position in write_buf measured
+ in units of UNIV_PAGE_SIZE */
+ byte* write_buf; /* write buffer used in writing to the
+ doublewrite buffer, aligned to an
+ address divisible by UNIV_PAGE_SIZE
+ (which is required by Windows aio) */
+ byte* write_buf_unaligned; /* pointer to write_buf, but unaligned */
+ buf_block_t**
+ buf_block_arr; /* array to store pointers to the buffer
+ blocks which have been cached to write_buf */
+};
+
/* The transaction system central memory data structure; protected by the
kernel mutex */
struct trx_sys_struct{
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