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Commit 97f59719 authored by jan@hundin.mysql.fi's avatar jan@hundin.mysql.fi
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Added support for X/Open XA prepare, recover, commit and rollback.

parent 7120a875
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Showing with 1029 additions and 48 deletions
innobase/include/trx0roll.h
View file @ 97f59719
......@@ -104,11 +104,12 @@ trx_rollback(
/***********************************************************************
Rollback or clean up transactions which have no user session. If the
transaction already was committed, then we clean up a possible insert
undo log. If the transaction was not yet committed, then we roll it back. */
undo log. If the transaction was not yet committed, then we roll it back.
Note: this is done in a background thread */
void
trx_rollback_or_clean_all_without_sess(void);
/*========================================*/
void *
trx_rollback_or_clean_all_without_sess(void *);
/*============================================*/
/********************************************************************
Finishes a transaction rollback. */
......
innobase/include/trx0trx.h
View file @ 97f59719
......@@ -16,6 +16,7 @@ Created 3/26/1996 Heikki Tuuri
#include "que0types.h"
#include "mem0mem.h"
#include "read0types.h"
#include "xa.h"
extern ulint trx_n_mysql_transactions;
......@@ -156,6 +157,36 @@ trx_commit_for_mysql(
/*=================*/
/* out: 0 or error number */
trx_t* trx); /* in: trx handle */
/**************************************************************************
Does the transaction prepare for MySQL. */
ulint
trx_prepare_for_mysql(
/*=================*/
/* out: 0 or error number */
trx_t* trx); /* in: trx handle */
/**************************************************************************
This function is used to find number of prepared transactions and
their transaction objects for a recovery. */
int
trx_recover_for_mysql(
/*=================*/
/* out: number of prepared transactions */
XID* xid_list, /* in/out: prepared transactions */
uint len); /* in: number of slots in xid_list */
/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */
trx_t *
trx_get_trx_by_xid(
/*===============*/
/* out: trx or NULL */
XID* xid); /* in: X/Open XA Transaction Idenfication */
/**************************************************************************
If required, flushes the log to disk if we called trx_commit_for_mysql()
with trx->flush_log_later == TRUE. */
......@@ -339,6 +370,9 @@ struct trx_struct{
if we can use the insert buffer for
them, we set this FALSE */
dulint id; /* transaction id */
XID xid; /* X/Open XA transaction
identification to identify a
transaction branch */
dulint no; /* transaction serialization number ==
max trx id when the transaction is
moved to COMMITTED_IN_MEMORY state */
......@@ -353,8 +387,10 @@ struct trx_struct{
dulint table_id; /* table id if the preceding field is
TRUE */
/*------------------------------*/
void* mysql_thd; /* MySQL thread handle corresponding
to this trx, or NULL */
int active_trans; /* whether a transaction in MySQL
is active */
void* mysql_thd; /* MySQL thread handle corresponding
to this trx, or NULL */
char** mysql_query_str;/* pointer to the field in mysqld_thd
which contains the pointer to the
current SQL query string */
......@@ -543,6 +579,7 @@ struct trx_struct{
#define TRX_NOT_STARTED 1
#define TRX_ACTIVE 2
#define TRX_COMMITTED_IN_MEMORY 3
#define TRX_PREPARED 4 /* Support for 2PC/XA */
/* Transaction execution states when trx state is TRX_ACTIVE */
#define TRX_QUE_RUNNING 1 /* transaction is running */
......
innobase/include/trx0undo.h
View file @ 97f59719
......@@ -14,6 +14,7 @@ Created 3/26/1996 Heikki Tuuri
#include "mtr0mtr.h"
#include "trx0sys.h"
#include "page0types.h"
#include "xa.h"
/***************************************************************************
Builds a roll pointer dulint. */
......@@ -36,7 +37,7 @@ trx_undo_decode_roll_ptr(
ibool* is_insert, /* out: TRUE if insert undo log */
ulint* rseg_id, /* out: rollback segment id */
ulint* page_no, /* out: page number */
ulint* offset); /* out: offset of the undo entry within page */
ulint* offset); /* out: offset of the undo entry within page */
/***************************************************************************
Returns TRUE if the roll pointer is of the insert type. */
UNIV_INLINE
......@@ -239,6 +240,18 @@ trx_undo_set_state_at_finish(
trx_t* trx, /* in: transaction */
trx_undo_t* undo, /* in: undo log memory copy */
mtr_t* mtr); /* in: mtr */
/**********************************************************************
Sets the state of the undo log segment at a transaction prepare. */
page_t*
trx_undo_set_state_at_prepare(
/*==========================*/
/* out: undo log segment header page,
x-latched */
trx_t* trx, /* in: transaction */
trx_undo_t* undo, /* in: undo log memory copy */
mtr_t* mtr); /* in: mtr */
/**************************************************************************
Adds the update undo log header as the first in the history list, and
frees the memory object, or puts it to the list of cached update undo log
......@@ -294,7 +307,23 @@ trx_undo_parse_discard_latest(
byte* end_ptr,/* in: buffer end */
page_t* page, /* in: page or NULL */
mtr_t* mtr); /* in: mtr or NULL */
/************************************************************************
Write X/Open XA Transaction Identification (XID) to undo log header */
void
trx_undo_write_xid(
/*===============*/
trx_ulogf_t* log_hdr,/* in: undo log header */
XID* xid); /* in: X/Open XA Transaction Identification */
/************************************************************************
Read X/Open XA Transaction Identification (XID) from undo log header */
void
trx_undo_read_xid(
/*==============*/
trx_ulogf_t* log_hdr,/* in: undo log header */
XID* xid); /* out: X/Open XA Transaction Identification */
/* Types of an undo log segment */
#define TRX_UNDO_INSERT 1 /* contains undo entries for inserts */
......@@ -310,6 +339,8 @@ trx_undo_parse_discard_latest(
#define TRX_UNDO_TO_PURGE 4 /* update undo segment will not be
reused: it can be freed in purge when
all undo data in it is removed */
#define TRX_UNDO_PREPARED 5 /* contains an undo log of an
prepared transaction */
/* Transaction undo log memory object; this is protected by the undo_mutex
in the corresponding transaction object */
......@@ -332,6 +363,8 @@ struct trx_undo_struct{
field */
dulint trx_id; /* id of the trx assigned to the undo
log */
XID xid; /* X/Open XA transaction
identification */
ibool dict_operation; /* TRUE if a dict operation trx */
dulint table_id; /* if a dict operation, then the table
id */
......@@ -452,7 +485,18 @@ page of an update undo log segment. */
#define TRX_UNDO_HISTORY_NODE 34 /* If the log is put to the history
list, the file list node is here */
/*-------------------------------------------------------------*/
#define TRX_UNDO_LOG_HDR_SIZE (34 + FLST_NODE_SIZE)
/* X/Open XA Transaction Identification (XID) */
#define TRX_UNDO_XA_FORMAT (34 + FLST_NODE_SIZE)
#define TRX_UNDO_XA_TRID_LEN (TRX_UNDO_XA_FORMAT + 4)
#define TRX_UNDO_XA_BQUAL_LEN (TRX_UNDO_XA_TRID_LEN + 4)
#define TRX_UNDO_XA_XID (TRX_UNDO_XA_BQUAL_LEN + 4)
#define TRX_UNDO_XA_LEN (TRX_UNDO_XA_XID + XIDDATASIZE)
#define TRX_UNDO_XA_EXISTS 256
/*-------------------------------------------------------------*/
#define TRX_UNDO_LOG_HDR_SIZE (TRX_UNDO_XA_LEN)
/*-------------------------------------------------------------*/
#ifndef UNIV_NONINL
#include "trx0undo.ic"
......
innobase/include/xa.h 0 → 100644
View file @ 97f59719
/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1998-2002
* Sleepycat Software. All rights reserved.
*
* $Id: xa.h,v 11.5 2002/01/11 15:52:30 bostic Exp $
*/
/*
* Start of xa.h header
*
* Define a symbol to prevent multiple inclusions of this header file
*/
#ifndef XA_H
#define XA_H
/*
* Transaction branch identification: XID and NULLXID:
*/
#ifndef XIDDATASIZE
#define XIDDATASIZE 128 /* size in bytes */
#define MAXGTRIDSIZE 64 /* maximum size in bytes of gtrid */
#define MAXBQUALSIZE 64 /* maximum size in bytes of bqual */
struct xid_t {
long formatID; /* format identifier */
long gtrid_length; /* value from 1 through 64 */
long bqual_length; /* value from 1 through 64 */
char data[XIDDATASIZE];
};
typedef struct xid_t XID;
#endif
/*
* A value of -1 in formatID means that the XID is null.
*/
/*
* Declarations of routines by which RMs call TMs:
*/
extern int ax_reg __P((int, XID *, long));
extern int ax_unreg __P((int, long));
/*
* XA Switch Data Structure
*/
#define RMNAMESZ 32 /* length of resource manager name, */
/* including the null terminator */
#define MAXINFOSIZE 256 /* maximum size in bytes of xa_info */
/* strings, including the null
terminator */
struct xa_switch_t {
char name[RMNAMESZ]; /* name of resource manager */
long flags; /* resource manager specific options */
long version; /* must be 0 */
int (*xa_open_entry) /* xa_open function pointer */
__P((char *, int, long));
int (*xa_close_entry) /* xa_close function pointer */
__P((char *, int, long));
int (*xa_start_entry) /* xa_start function pointer */
__P((XID *, int, long));
int (*xa_end_entry) /* xa_end function pointer */
__P((XID *, int, long));
int (*xa_rollback_entry) /* xa_rollback function pointer */
__P((XID *, int, long));
int (*xa_prepare_entry) /* xa_prepare function pointer */
__P((XID *, int, long));
int (*xa_commit_entry) /* xa_commit function pointer */
__P((XID *, int, long));
int (*xa_recover_entry) /* xa_recover function pointer */
__P((XID *, long, int, long));
int (*xa_forget_entry) /* xa_forget function pointer */
__P((XID *, int, long));
int (*xa_complete_entry) /* xa_complete function pointer */
__P((int *, int *, int, long));
};
/*
* Flag definitions for the RM switch
*/
#define TMNOFLAGS 0x00000000L /* no resource manager features
selected */
#define TMREGISTER 0x00000001L /* resource manager dynamically
registers */
#define TMNOMIGRATE 0x00000002L /* resource manager does not support
association migration */
#define TMUSEASYNC 0x00000004L /* resource manager supports
asynchronous operations */
/*
* Flag definitions for xa_ and ax_ routines
*/
/* use TMNOFLAGGS, defined above, when not specifying other flags */
#define TMASYNC 0x80000000L /* perform routine asynchronously */
#define TMONEPHASE 0x40000000L /* caller is using one-phase commit
optimisation */
#define TMFAIL 0x20000000L /* dissociates caller and marks
transaction branch rollback-only */
#define TMNOWAIT 0x10000000L /* return if blocking condition
exists */
#define TMRESUME 0x08000000L /* caller is resuming association with
suspended transaction branch */
#define TMSUCCESS 0x04000000L /* dissociate caller from transaction
branch */
#define TMSUSPEND 0x02000000L /* caller is suspending, not ending,
association */
#define TMSTARTRSCAN 0x01000000L /* start a recovery scan */
#define TMENDRSCAN 0x00800000L /* end a recovery scan */
#define TMMULTIPLE 0x00400000L /* wait for any asynchronous
operation */
#define TMJOIN 0x00200000L /* caller is joining existing
transaction branch */
#define TMMIGRATE 0x00100000L /* caller intends to perform
migration */
/*
* ax_() return codes (transaction manager reports to resource manager)
*/
#define TM_JOIN 2 /* caller is joining existing
transaction branch */
#define TM_RESUME 1 /* caller is resuming association with
suspended transaction branch */
#define TM_OK 0 /* normal execution */
#define TMER_TMERR -1 /* an error occurred in the transaction
manager */
#define TMER_INVAL -2 /* invalid arguments were given */
#define TMER_PROTO -3 /* routine invoked in an improper
context */
/*
* xa_() return codes (resource manager reports to transaction manager)
*/
#define XA_RBBASE 100 /* The inclusive lower bound of the
rollback codes */
#define XA_RBROLLBACK XA_RBBASE /* The rollback was caused by an
unspecified reason */
#define XA_RBCOMMFAIL XA_RBBASE+1 /* The rollback was caused by a
communication failure */
#define XA_RBDEADLOCK XA_RBBASE+2 /* A deadlock was detected */
#define XA_RBINTEGRITY XA_RBBASE+3 /* A condition that violates the
integrity of the resources was
detected */
#define XA_RBOTHER XA_RBBASE+4 /* The resource manager rolled back the
transaction branch for a reason not
on this list */
#define XA_RBPROTO XA_RBBASE+5 /* A protocol error occurred in the
resource manager */
#define XA_RBTIMEOUT XA_RBBASE+6 /* A transaction branch took too long */
#define XA_RBTRANSIENT XA_RBBASE+7 /* May retry the transaction branch */
#define XA_RBEND XA_RBTRANSIENT /* The inclusive upper bound of the
rollback codes */
#define XA_NOMIGRATE 9 /* resumption must occur where
suspension occurred */
#define XA_HEURHAZ 8 /* the transaction branch may have
been heuristically completed */
#define XA_HEURCOM 7 /* the transaction branch has been
heuristically committed */
#define XA_HEURRB 6 /* the transaction branch has been
heuristically rolled back */
#define XA_HEURMIX 5 /* the transaction branch has been
heuristically committed and rolled
back */
#define XA_RETRY 4 /* routine returned with no effect and
may be re-issued */
#define XA_RDONLY 3 /* the transaction branch was read-only
and has been committed */
#define XA_OK 0 /* normal execution */
#define XAER_ASYNC -2 /* asynchronous operation already
outstanding */
#define XAER_RMERR -3 /* a resource manager error occurred in
the transaction branch */
#define XAER_NOTA -4 /* the XID is not valid */
#define XAER_INVAL -5 /* invalid arguments were given */
#define XAER_PROTO -6 /* routine invoked in an improper
context */
#define XAER_RMFAIL -7 /* resource manager unavailable */
#define XAER_DUPID -8 /* the XID already exists */
#define XAER_OUTSIDE -9 /* resource manager doing work outside
transaction */
#endif /* ifndef XA_H */
/*
* End of xa.h header
*/
innobase/log/log0recv.c
View file @ 97f59719
......@@ -2851,11 +2851,13 @@ void
recv_recovery_from_checkpoint_finish(void)
/*======================================*/
{
int i;
os_thread_id_t recovery_thread_id;
/* Rollback the uncommitted transactions which have no user session */
if (srv_force_recovery < SRV_FORCE_NO_TRX_UNDO) {
trx_rollback_or_clean_all_without_sess();
}
fprintf(stderr,
"InnoDB: Starting to apply log records to the database...\n");
/* Apply the hashed log records to the respective file pages */
......@@ -2888,9 +2890,15 @@ recv_recovery_from_checkpoint_finish(void)
/* Free the resources of the recovery system */
recv_recovery_on = FALSE;
#ifndef UNIV_LOG_DEBUG
recv_sys_free();
#endif
if (srv_force_recovery < SRV_FORCE_NO_TRX_UNDO) {
os_thread_create(trx_rollback_or_clean_all_without_sess,
(void *)&i, &recovery_thread_id);
}
}
/**********************************************************
......
innobase/row/row0ins.c
View file @ 97f59719
......@@ -1509,7 +1509,6 @@ row_ins_scan_sec_index_for_duplicate(
ibool moved;
mtr_t mtr;
trx_t* trx;
const char* ptr;
n_unique = dict_index_get_n_unique(index);
......@@ -1630,7 +1629,6 @@ row_ins_duplicate_error_in_clust(
page_t* page;
ulint n_unique;
trx_t* trx = thr_get_trx(thr);
const char* ptr;
UT_NOT_USED(mtr);
......
innobase/trx/trx0roll.c
View file @ 97f59719
......@@ -331,10 +331,11 @@ trx_savept_take(
/***********************************************************************
Rollback or clean up transactions which have no user session. If the
transaction already was committed, then we clean up a possible insert
undo log. If the transaction was not yet committed, then we roll it back. */
undo log. If the transaction was not yet committed, then we roll it back.
Note: this is done in a background thread */
void
trx_rollback_or_clean_all_without_sess(void)
void *
trx_rollback_or_clean_all_without_sess(void *i)
/*========================================*/
{
mem_heap_t* heap;
......@@ -362,7 +363,7 @@ trx_rollback_or_clean_all_without_sess(void)
fprintf(stderr,
"InnoDB: Starting rollback of uncommitted transactions\n");
} else {
return;
os_thread_exit(i);
}
loop:
heap = mem_heap_create(512);
......@@ -371,9 +372,15 @@ trx_rollback_or_clean_all_without_sess(void)
trx = UT_LIST_GET_FIRST(trx_sys->trx_list);
while (trx && (trx->sess || (trx->conc_state == TRX_NOT_STARTED))) {
while (trx) {
trx = UT_LIST_GET_NEXT(trx_list, trx);
if ((trx->sess || (trx->conc_state == TRX_NOT_STARTED))) {
trx = UT_LIST_GET_NEXT(trx_list, trx);
} else if (trx->conc_state == TRX_PREPARED) {
trx->sess = trx_dummy_sess;
} else {
break;
}
}
mutex_exit(&kernel_mutex);
......@@ -384,10 +391,11 @@ trx_rollback_or_clean_all_without_sess(void)
mem_heap_free(heap);
return;
os_thread_exit(i);
}
trx->sess = trx_dummy_sess;
if (trx->conc_state == TRX_COMMITTED_IN_MEMORY) {
fprintf(stderr, "InnoDB: Cleaning up trx with id %lu %lu\n",
......@@ -486,6 +494,8 @@ trx_rollback_or_clean_all_without_sess(void)
mem_heap_free(heap);
goto loop;
os_thread_exit(i); /* not reached */
}
/***********************************************************************
......
innobase/trx/trx0sys.c
View file @ 97f59719
......@@ -887,8 +887,12 @@ trx_sys_init_at_db_start(void)
trx = UT_LIST_GET_FIRST(trx_sys->trx_list);
for (;;) {
rows_to_undo +=
if ( trx->conc_state != TRX_PREPARED) {
rows_to_undo +=
ut_conv_dulint_to_longlong(trx->undo_no);
}
trx = UT_LIST_GET_NEXT(trx_list, trx);
if (!trx) {
......
innobase/trx/trx0trx.c
View file @ 97f59719
......@@ -24,6 +24,7 @@ Created 3/26/1996 Heikki Tuuri
#include "thr0loc.h"
#include "btr0sea.h"
#include "os0proc.h"
#include "xa.h"
/* Copy of the prototype for innobase_mysql_print_thd: this
copy MUST be equal to the one in mysql/sql/ha_innodb.cc ! */
......@@ -156,6 +157,10 @@ trx_create(
trx->read_view_heap = mem_heap_create(256);
trx->read_view = NULL;
/* Set X/Open XA transaction identification to NULL */
memset(&trx->xid,0,sizeof(trx->xid));
trx->xid.formatID = -1;
return(trx);
}
......@@ -408,13 +413,22 @@ trx_lists_init_at_db_start(void)
trx = trx_create(NULL);
trx->id = undo->trx_id;
trx->xid = undo->xid;
trx->insert_undo = undo;
trx->rseg = rseg;
if (undo->state != TRX_UNDO_ACTIVE) {
trx->conc_state = TRX_COMMITTED_IN_MEMORY;
/* Prepared transactions are left in
the prepared state waiting for a
commit or abort decision from MySQL */
if (undo->state == TRX_UNDO_PREPARED) {
trx->conc_state = TRX_PREPARED;
} else {
trx->conc_state =
TRX_COMMITTED_IN_MEMORY;
}
/* We give a dummy value for the trx no;
this should have no relevance since purge
......@@ -457,10 +471,22 @@ trx_lists_init_at_db_start(void)
trx = trx_create(NULL);
trx->id = undo->trx_id;
trx->xid = undo->xid;
if (undo->state != TRX_UNDO_ACTIVE) {
trx->conc_state =
TRX_COMMITTED_IN_MEMORY;
/* Prepared transactions are left in
the prepared state waiting for a
commit or abort decision from MySQL */
if (undo->state == TRX_UNDO_PREPARED) {
trx->conc_state =
TRX_PREPARED;
} else {
trx->conc_state =
TRX_COMMITTED_IN_MEMORY;
}
/* We give a dummy value for the trx
number */
......@@ -726,7 +752,8 @@ trx_commit_off_kernel(
mutex_enter(&kernel_mutex);
}
ut_ad(trx->conc_state == TRX_ACTIVE);
ut_ad(trx->conc_state == TRX_ACTIVE || trx->conc_state == TRX_PREPARED);
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&kernel_mutex));
#endif /* UNIV_SYNC_DEBUG */
......@@ -1667,3 +1694,238 @@ trx_print(
innobase_mysql_print_thd(f, trx->mysql_thd);
}
}
/********************************************************************
Prepares a transaction. */
void
trx_prepare_off_kernel(
/*==================*/
trx_t* trx) /* in: transaction */
{
page_t* update_hdr_page;
dulint lsn;
trx_rseg_t* rseg;
trx_undo_t* undo;
ibool must_flush_log = FALSE;
mtr_t mtr;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&kernel_mutex));
#endif /* UNIV_SYNC_DEBUG */
rseg = trx->rseg;
if (trx->insert_undo != NULL || trx->update_undo != NULL) {
mutex_exit(&kernel_mutex);
mtr_start(&mtr);
must_flush_log = TRUE;
/* Change the undo log segment states from TRX_UNDO_ACTIVE
to some other state: these modifications to the file data
structure define the transaction as prepared in the file
based world, at the serialization point of the log sequence
number lsn obtained below. */
mutex_enter(&(rseg->mutex));
if (trx->insert_undo != NULL) {
trx_undo_set_state_at_prepare(trx, trx->insert_undo,
&mtr);
}
undo = trx->update_undo;
if (undo) {
mutex_enter(&kernel_mutex);
trx->no = trx_sys_get_new_trx_no();
mutex_exit(&kernel_mutex);
/* It is not necessary to obtain trx->undo_mutex here
because only a single OS thread is allowed to do the
transaction prepare for this transaction. */
update_hdr_page = trx_undo_set_state_at_prepare(trx, undo, &mtr);
}
mutex_exit(&(rseg->mutex));
/*--------------*/
mtr_commit(&mtr);
/*--------------*/
lsn = mtr.end_lsn;
mutex_enter(&kernel_mutex);
}
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&kernel_mutex));
#endif /* UNIV_SYNC_DEBUG */
/*--------------------------------------*/
trx->conc_state = TRX_PREPARED;
/*--------------------------------------*/
if (trx->read_view) {
read_view_close(trx->read_view);
mem_heap_empty(trx->read_view_heap);
trx->read_view = NULL;
}
if (must_flush_log) {
mutex_exit(&kernel_mutex);
if (trx->insert_undo != NULL) {
trx_undo_insert_cleanup(trx);
}
/* Write the log to the log files AND flush them to disk */
/*-------------------------------------*/
log_write_up_to(lsn, LOG_WAIT_ONE_GROUP, TRUE);
/*-------------------------------------*/
mutex_enter(&kernel_mutex);
}
}
/**************************************************************************
Does the transaction prepare for MySQL. */
ulint
trx_prepare_for_mysql(
/*=================*/
/* out: 0 or error number */
trx_t* trx) /* in: trx handle */
{
/* Because we do not do the prepare by sending an Innobase
sig to the transaction, we must here make sure that trx has been
started. */
ut_a(trx);
trx->op_info = "preparing";
trx_start_if_not_started(trx);
mutex_enter(&kernel_mutex);
trx_prepare_off_kernel(trx);
mutex_exit(&kernel_mutex);
trx->op_info = "";
return(0);
}
/**************************************************************************
This function is used to find number of prepared transactions and
their transaction objects for a recovery. */
int
trx_recover_for_mysql(
/*==================*/
/* out: number of prepared transactions
stored in xid_list */
XID* xid_list, /* in/out: prepared transactions */
uint len) /* in: number of slots in xid_list */
{
trx_t* trx;
int num_of_transactions = 0;
ut_ad(xid_list);
ut_ad(len);
fprintf(stderr,
"InnoDB: Starting recovery for XA transactions...\n");
/* We should set those transactions which are in
the prepared state to the xid_list */
mutex_enter(&kernel_mutex);
trx = UT_LIST_GET_FIRST(trx_sys->trx_list);
while (trx) {
if (trx->conc_state == TRX_PREPARED) {
xid_list[num_of_transactions] = trx->xid;
num_of_transactions++;
if ( (uint)num_of_transactions == len ) {
break;
}
}
trx = UT_LIST_GET_NEXT(trx_list, trx);
}
mutex_exit(&kernel_mutex);
fprintf(stderr,
"InnoDB: %d transactions in prepare state after recovery\n",
num_of_transactions);
return (num_of_transactions);
}
/***********************************************************************
This function is used to find one X/Open XA distributed transaction
which is in the prepared state */
trx_t *
trx_get_trx_by_xid(
/*===============*/
/* out: trx or NULL */
XID* xid) /* in: X/Open XA Transaction Idenfication */
{
trx_t* trx;
if (xid == NULL) {
return (NULL);
}
mutex_enter(&kernel_mutex);
trx = UT_LIST_GET_FIRST(trx_sys->trx_list);
while (trx) {
/* Compare two X/Open XA transaction id's: their
length should be the same and binary comparison
of gtrid_lenght+bqual_length bytes should be
the same */
if (xid->gtrid_length == trx->xid.gtrid_length &&
xid->bqual_length == trx->xid.bqual_length &&
memcmp(xid, &trx->xid,
xid->gtrid_length +
xid->bqual_length) == 0) {
break;
}
trx = UT_LIST_GET_NEXT(trx_list, trx);
}
mutex_exit(&kernel_mutex);
if (trx) {
if (trx->conc_state != TRX_PREPARED) {
return(NULL);
}
return(trx);
} else {
return(NULL);
}
}
innobase/trx/trx0undo.c
View file @ 97f59719
This diff is collapsed.
sql/ha_innodb.cc
View file @ 97f59719
......@@ -80,6 +80,7 @@ extern "C" {
#include "../innobase/include/fsp0fsp.h"
#include "../innobase/include/sync0sync.h"
#include "../innobase/include/fil0fil.h"
#include "../innobase/include/xa.h"
}
#define HA_INNOBASE_ROWS_IN_TABLE 10000 /* to get optimization right */
......@@ -149,6 +150,15 @@ static mysql_byte* innobase_get_key(INNOBASE_SHARE *share,uint *length,
static INNOBASE_SHARE *get_share(const char *table_name);
static void free_share(INNOBASE_SHARE *share);
/*********************************************************************
Commits a transaction in an InnoDB database. */
void
innobase_commit_low(
/*================*/
trx_t* trx); /* in: transaction handle */
/* General functions */
/**********************************************************************
......@@ -1254,7 +1264,7 @@ innobase_commit(
if (trx_handle != (void*)&innodb_dummy_stmt_trx_handle
|| (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {
/* We were instructed to commit the whole transaction, or
/* We were instructed to commit the whole transaction, or
this is an SQL statement end and autocommit is on */
innobase_commit_low(trx);
......@@ -1395,6 +1405,39 @@ innobase_rollback(
DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}
/*********************************************************************
Rolls back a transaction */
int
innobase_rollback_trx(
/*==================*/
/* out: 0 or error number */
trx_t* trx) /* in: transaction */
{
int error = 0;
DBUG_ENTER("innobase_rollback_trx");
DBUG_PRINT("trans", ("aborting transaction"));
/* Release a possible FIFO ticket and search latch. Since we will
reserve the kernel mutex, we have to release the search system latch
first to obey the latching order. */
innobase_release_stat_resources(trx);
if (trx->auto_inc_lock) {
/* If we had reserved the auto-inc lock for some table (if
we come here to roll back the latest SQL statement) we
release it now before a possibly lengthy rollback */
row_unlock_table_autoinc_for_mysql(trx);
}
error = trx_rollback_for_mysql(trx);
DBUG_RETURN(convert_error_code_to_mysql(error, NULL));
}
/*********************************************************************
Rolls back a transaction to a savepoint. */
......@@ -5666,4 +5709,158 @@ innobase_query_is_replace(void)
}
}
/***********************************************************************
This function is used to prepare X/Open XA distributed transaction */
int innobase_xa_prepare(
/*====================*/
/* out: 0 or error number */
THD* thd, /* in: handle to the MySQL thread of the user
whose XA transaction should be prepared */
bool all) /* in: TRUE - commit transaction
FALSE - the current SQL statement ended */
{
int error = 0;
trx_t* trx;
trx = check_trx_exists(thd);
/* TODO: Get X/Open XA Transaction Identification from MySQL*/
memset(&trx->xid, 0, sizeof(trx->xid));
trx->xid.formatID = -1;
/* Release a possible FIFO ticket and search latch. Since we will
reserve the kernel mutex, we have to release the search system latch
first to obey the latching order. */
innobase_release_stat_resources(trx);
if (trx->active_trans == 0 && trx->conc_state != TRX_NOT_STARTED) {
fprintf(stderr,
"InnoDB: Error: thd->transaction.all.innodb_active_trans == 0\n"
"InnoDB: but trx->conc_state != TRX_NOT_STARTED\n");
}
if (all || (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))) {
/* We were instructed to prepare the whole transaction, or
this is an SQL statement end and autocommit is on */
error = trx_prepare_for_mysql(trx);
} else {
/* We just mark the SQL statement ended and do not do a
transaction prepare */
if (trx->auto_inc_lock) {
/* If we had reserved the auto-inc lock for some
table in this SQL statement we release it now */
row_unlock_table_autoinc_for_mysql(trx);
}
/* Store the current undo_no of the transaction so that we
know where to roll back if we have to roll back the next
SQL statement */
trx_mark_sql_stat_end(trx);
}
/* Tell the InnoDB server that there might be work for utility
threads: */
srv_active_wake_master_thread();
return error;
}
/***********************************************************************
This function is used to recover X/Open XA distributed transactions */
int innobase_xa_recover(
/* out: number of prepared transactions
stored in xid_list */
XID* xid_list, /* in/out: prepared transactions */
uint len) /* in: number of slots in xid_list */
/*====================*/
{
if (len == 0 || xid_list == NULL) {
return 0;
}
return (trx_recover_for_mysql(xid_list, len));
}
/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */
int innobase_commit_by_xid(
/*=======================*/
/* out: 0 or error number */
XID* xid) /* in: X/Open XA Transaction Identification */
{
trx_t* trx;
trx = trx_get_trx_by_xid(xid);
if (trx) {
innobase_commit_low(trx);
return(XA_OK);
} else {
return(XAER_NOTA);
}
}
/***********************************************************************
This function is used to rollback one X/Open XA distributed transaction
which is in the prepared state */
int innobase_rollback_by_xid(
/* out: 0 or error number */
XID *xid) /* in : X/Open XA Transaction Idenfification */
{
trx_t* trx;
trx = trx_get_trx_by_xid(xid);
if (trx) {
return(innobase_rollback_trx(trx));
} else {
return(XAER_NOTA);
}
}
/***********************************************************************
This function is used to test commit/rollback of XA transactions */
int innobase_xa_end(
/*================*/
THD* thd) /* in: MySQL thread handle of the user for whom
transactions should be recovered */
{
DBUG_ENTER("innobase_xa_end");
XID trx_list[100];
int trx_num, trx_num_max = 100;
int i;
XID xid;
while(trx_num = innobase_xa_recover(trx_list, trx_num_max)) {
for(i=0;i < trx_num; i++) {
xid = trx_list[i];
if ( i % 2) {
innobase_commit_by_xid(&xid);
} else {
innobase_rollback_by_xid(&xid);
}
}
}
free(trx_list);
DBUG_RETURN(0);
}
#endif /* HAVE_INNOBASE_DB */
sql/ha_innodb.h
View file @ 97f59719
......@@ -243,3 +243,46 @@ void innobase_release_temporary_latches(void* innobase_tid);
void innobase_store_binlog_offset_and_flush_log(char *binlog_name,longlong offset);
int innobase_start_trx_and_assign_read_view(THD* thd);
/***********************************************************************
This function is used to prepare X/Open XA distributed transaction */
int innobase_xa_prepare(
/*====================*/
/* out: 0 or error number */
THD* thd, /* in: handle to the MySQL thread of the user
whose XA transaction should be prepared */
bool all); /* in: TRUE - commit transaction
FALSE - the current SQL statement ended */
/***********************************************************************
This function is used to recover X/Open XA distributed transactions */
int innobase_xa_recover(
/*====================*/
/* out: number of prepared transactions
stored in xid_list */
XID* xid_list, /* in/out: prepared transactions */
uint len); /* in: number of slots in xid_list */
/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */
int innobase_commit_by_xid(
/*=======================*/
/* out: 0 or error number */
XID* xid); /* in : X/Open XA Transaction Identification */
/***********************************************************************
This function is used to rollback one X/Open XA distributed transaction
which is in the prepared state */
int innobase_rollback_by_xid(
/* out: 0 or error number */
XID *xid); /* in : X/Open XA Transaction Idenfification */
int innobase_xa_end(THD *thd);
sql/handler.h
View file @ 97f59719
......@@ -193,6 +193,41 @@ typedef struct st_thd_trans {
void *ndb_tid;
} THD_TRANS;
#ifndef XIDDATASIZE /* no xa.h included */
/* XXX - may be we should disable xa completely in this case ? */
#define XIDDATASIZE 128
#define MAXGTRIDSIZE 64
#define MAXBQUALSIZE 64
struct xid_t {
long formatID;
long gtrid_length;
long bqual_length;
char data[XIDDATASIZE];
};
typedef struct xid_t XID;
#endif
typedef struct
{
byte slot;
uint savepoint_offset;
int (*close_connection)(THD *thd);
int (*savepoint_set)(THD *thd, void *sv);
int (*savepoint_rollback)(THD *thd, void *sv);
int (*savepoint_release)(THD *thd, void *sv);
int (*commit)(THD *thd, bool all);
int (*rollback)(THD *thd, bool all);
int (*prepare)(THD *thd, bool all);
int (*recover)(XID *xid_list, uint len);
int (*commit_by_xid)(XID *xid);
int (*rollback_by_xid)(XID *xid);
} handlerton;
enum enum_tx_isolation { ISO_READ_UNCOMMITTED, ISO_READ_COMMITTED,
ISO_REPEATABLE_READ, ISO_SERIALIZABLE};
......
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