InnoDB cleanup: Remove unused code for online backup

innobase/include/log0log.h:
  Remove references to online backup
innobase/include/log0log.ic:
  Remove references to online backup
innobase/include/mtr0mtr.h:
  Remove references to MLOG_FULL_PAGE
innobase/log/log0log.c:
  Remove references to online backup
innobase/log/log0recv.c:
  Remove references to MLOG_FULL_PAGE
innobase/mtr/mtr0mtr.c:
  Remove references to MLOG_FULL_PAGE
  Remove references to online backup

innobase/include/log0log.h

@@ -114,20 +114,6 @@ dulint
 log_get_lsn(void);
 /*=============*/
 			/* out: current lsn */
-/****************************************************************************
-Gets the online backup lsn. */
-UNIV_INLINE
-dulint
-log_get_online_backup_lsn_low(void);
-/*===============================*/
-/****************************************************************************
-Gets the online backup state. */
-UNIV_INLINE
-ibool
-log_get_online_backup_state_low(void);
-/*=================================*/
-				/* out: online backup state, the caller must
-				own the log_sys mutex */
 /**********************************************************
 Initializes the log. */
 
@@ -326,20 +312,6 @@ log_archived_file_name_gen(
 	char*	buf,	/* in: buffer where to write */
 	ulint	id,	/* in: group id */
 	ulint	file_no);/* in: file number */
-/**********************************************************
-Switches the database to the online backup state. */
-
-ulint
-log_switch_backup_state_on(void);
-/*============================*/
-			/* out: DB_SUCCESS or DB_ERROR */
-/**********************************************************
-Switches the online backup state off. */
-
-ulint
-log_switch_backup_state_off(void);
-/*=============================*/
-			/* out: DB_SUCCESS or DB_ERROR */
 /************************************************************************
 Checks that there is enough free space in the log to start a new query step.
 Flushes the log buffer or makes a new checkpoint if necessary. NOTE: this
@@ -871,13 +843,6 @@ struct log_struct{
 	os_event_t	archiving_on;	/* if archiving has been stopped,
 					a thread can wait for this event to
 					become signaled */
-	/* Fields involved in online backups */
-	ibool		online_backup_state;
-					/* TRUE if the database is in the
-					online backup state */
-	dulint		online_backup_lsn;
-					/* lsn when the state was changed to
-					the online backup state */
 };
 
 #define LOG_ARCH_ON		71

innobase/include/log0log.ic

@@ -318,8 +318,7 @@ log_reserve_and_write_fast(
 
 	data_len = len + log->buf_free % OS_FILE_LOG_BLOCK_SIZE;
 
-	if (log->online_backup_state
-	    || (data_len >= OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_TRL_SIZE)) {
+	if (data_len >= OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_TRL_SIZE) {
 
 	    	/* The string does not fit within the current log block
 	    	or the log block would become full */
@@ -403,36 +402,3 @@ log_free_check(void)
 		log_check_margins();
 	}
 }
-
-/****************************************************************************
-Gets the online backup lsn. */
-UNIV_INLINE
-dulint
-log_get_online_backup_lsn_low(void)
-/*===============================*/
-				/* out: online_backup_lsn, the caller must
-				own the log_sys mutex */
-{
-#ifdef UNIV_SYNC_DEBUG
-	ut_ad(mutex_own(&(log_sys->mutex)));
-#endif /* UNIV_SYNC_DEBUG */
-	ut_ad(log_sys->online_backup_state);
-
-	return(log_sys->online_backup_lsn);
-}
-
-/****************************************************************************
-Gets the online backup state. */
-UNIV_INLINE
-ibool
-log_get_online_backup_state_low(void)
-/*=================================*/
-				/* out: online backup state, the caller must
-				own the log_sys mutex */
-{
-#ifdef UNIV_SYNC_DEBUG
-	ut_ad(mutex_own(&(log_sys->mutex)));
-#endif /* UNIV_SYNC_DEBUG */
-
-	return(log_sys->online_backup_state);
-}

innobase/include/mtr0mtr.h

@@ -82,7 +82,7 @@ flag value must give the length also! */
 						predefined minimum record */
 #define MLOG_IBUF_BITMAP_INIT	((byte)27)	/* initialize an ibuf bitmap
 						page */
-#define	MLOG_FULL_PAGE		((byte)28)	/* full contents of a page */
+/*#define	MLOG_FULL_PAGE	((byte)28)	full contents of a page */
 #define MLOG_INIT_FILE_PAGE	((byte)29)	/* this means that a file page
 						is taken into use and the prior
 						contents of the page should be
@@ -230,16 +230,6 @@ mtr_memo_release(
 	mtr_t*	mtr,	/* in: mtr */
 	void*	object,	/* in: object */
 	ulint	type);	/* in: object type: MTR_MEMO_S_LOCK, ... */
-/****************************************************************
-Parses a log record which contains the full contents of a page. */
-
-byte*
-mtr_log_parse_full_page(
-/*====================*/
-			/* out: end of log record or NULL */
-	byte*	ptr,	/* in: buffer */
-	byte*	end_ptr,/* in: buffer end */
-	page_t*	page);	/* in: page or NULL */
 /**************************************************************
 Checks if memo contains the given item. */
 UNIV_INLINE

innobase/log/log0log.c

@@ -793,11 +793,7 @@ log_init(void)
 	log_sys->archiving_on = os_event_create(NULL);
 
 	/*----------------------------*/
-	
-	log_sys->online_backup_state = FALSE;
 
-	/*----------------------------*/
-	
 	log_block_init(log_sys->buf, log_sys->lsn);
 	log_block_set_first_rec_group(log_sys->buf, LOG_BLOCK_HDR_SIZE);
 
@@ -2973,66 +2969,6 @@ loop:
 	mutex_exit(&(log_sys->mutex));
 }
 
-/**********************************************************
-Switches the database to the online backup state. */
-
-ulint
-log_switch_backup_state_on(void)
-/*============================*/
-			/* out: DB_SUCCESS or DB_ERROR */
-{
-	dulint	backup_lsn;
-	
-	mutex_enter(&(log_sys->mutex));
-
-	if (log_sys->online_backup_state) {
-
-		/* The database is already in that state */
-
-		mutex_exit(&(log_sys->mutex));
-
-		return(DB_ERROR);
-	}
-
-	log_sys->online_backup_state = TRUE;
-
-	backup_lsn = log_sys->lsn;
-
-	log_sys->online_backup_lsn = backup_lsn;
-
-	mutex_exit(&(log_sys->mutex));
-
-	/* log_checkpoint_and_mark_file_spaces(); */
-
-	return(DB_SUCCESS);
-}
-
-/**********************************************************
-Switches the online backup state off. */
-
-ulint
-log_switch_backup_state_off(void)
-/*=============================*/
-			/* out: DB_SUCCESS or DB_ERROR */
-{
-	mutex_enter(&(log_sys->mutex));
-
-	if (!log_sys->online_backup_state) {
-
-		/* The database is already in that state */
-
-		mutex_exit(&(log_sys->mutex));
-
-		return(DB_ERROR);
-	}
-
-	log_sys->online_backup_state = FALSE;
-
-	mutex_exit(&(log_sys->mutex));
-
-	return(DB_SUCCESS);
-}
-
 /********************************************************************
 Makes a checkpoint at the latest lsn and writes it to first page of each
 data file in the database, so that we know that the file spaces contain

innobase/log/log0recv.c

@@ -790,9 +790,6 @@ recv_parse_or_apply_log_rec_body(
 	} else if (type == MLOG_IBUF_BITMAP_INIT) {
 		new_ptr = ibuf_parse_bitmap_init(ptr, end_ptr, page, mtr);
 
-	} else if (type == MLOG_FULL_PAGE) {
-		new_ptr = mtr_log_parse_full_page(ptr, end_ptr, page);
-	
 	} else if (type == MLOG_INIT_FILE_PAGE) {
 		new_ptr = fsp_parse_init_file_page(ptr, end_ptr, page);
 
@@ -1093,15 +1090,7 @@ recv_recover_page(
 			buf = ((byte*)(recv->data)) + sizeof(recv_data_t);
 		}
 
-		if (recv->type == MLOG_INIT_FILE_PAGE
-		    || recv->type == MLOG_FULL_PAGE) {
-			/* A new file page may have been taken into use,
-			or we have stored the full contents of the page:
-			in this case it may be that the original log record
-			type was MLOG_INIT_FILE_PAGE, and we replaced it
-			with MLOG_FULL_PAGE, thus we have to apply
-			any record of type MLOG_FULL_PAGE */
-			
+		if (recv->type == MLOG_INIT_FILE_PAGE) {
 			page_lsn = page_newest_lsn;
 
 			mach_write_to_8(page + UNIV_PAGE_SIZE

innobase/mtr/mtr0mtr.c

@@ -105,179 +105,6 @@ mtr_memo_pop_all(
 	}
 }
 
-/****************************************************************
-Writes to the log the contents of a full page. This is called when the
-database is in the online backup state. */
-static
-void
-mtr_log_write_full_page(
-/*====================*/
-	page_t*	page,	/* in: page to write */
-	ulint	i,	/* in: i'th page for mtr */
-	ulint	n_pages,/* in: total number of pages for mtr */
-	mtr_t*	mtr)	/* in: mtr */
-{
-	byte*	buf;
-	byte*	ptr;
-	ulint	len;
-
-	buf = mem_alloc(UNIV_PAGE_SIZE + 50);
-
-	ptr = mlog_write_initial_log_record_fast(page, MLOG_FULL_PAGE, buf,
-									mtr);
-	ut_memcpy(ptr, page, UNIV_PAGE_SIZE);
-
-	len = (ptr - buf) + UNIV_PAGE_SIZE;
-
-	if (i == n_pages - 1) {
-		if (n_pages > 1) {
-			*(buf + len) = MLOG_MULTI_REC_END;
-			len++;
-		} else {
-			*buf = (byte)((ulint)*buf | MLOG_SINGLE_REC_FLAG);
-		}
-	}
-	
-	ut_ad(len < UNIV_PAGE_SIZE + 50);
-
-	log_write_low(buf, len);
-
-	mem_free(buf);
-}	
-
-/****************************************************************
-Parses a log record which contains the full contents of a page. */
-
-byte*
-mtr_log_parse_full_page(
-/*====================*/
-			/* out: end of log record or NULL */
-	byte*	ptr,	/* in: buffer */
-	byte*	end_ptr,/* in: buffer end */
-	page_t*	page)	/* in: page or NULL */
-{
-	if (end_ptr < ptr + UNIV_PAGE_SIZE) {
-
-		return(NULL);
-	} 
-
-	if (page) {
-		ut_memcpy(page, ptr, UNIV_PAGE_SIZE);
-	}
-
-	return(ptr + UNIV_PAGE_SIZE);
-}
-	
-/****************************************************************
-Writes to the database log the full contents of the pages that this mtr has
-modified. */
-static
-void
-mtr_log_write_backup_full_pages(
-/*============================*/
-	mtr_t*	mtr,	/* in: mini-transaction */
-	ulint	n_pages)/* in: number of pages modified by mtr */ 
-{
-	mtr_memo_slot_t* slot;
-	dyn_array_t*	memo;
-	buf_block_t*	block;
-	ulint		offset;
-	ulint		type;
-	ulint		i;
-
-	ut_ad(mtr);
-	ut_ad(mtr->magic_n == MTR_MAGIC_N);
-	ut_ad(mtr->state == MTR_COMMITTING);
-		
-	/* Open the database log for log_write_low */
-	mtr->start_lsn = log_reserve_and_open(n_pages * (UNIV_PAGE_SIZE + 50));
-
-	memo = &(mtr->memo);
-
-	offset = dyn_array_get_data_size(memo);
-
-	i = 0;
-	
-	while (offset > 0) {
-		offset -= sizeof(mtr_memo_slot_t);
-		slot = dyn_array_get_element(memo, offset);
-
-		block = slot->object;
-		type = slot->type;
-
-		if ((block != NULL) && (type == MTR_MEMO_PAGE_X_FIX)) {
-
-			mtr_log_write_full_page(block->frame, i, n_pages, mtr);
-
-			i++;
-		}
-	}
-
-	ut_ad(i == n_pages);
-}
-
-/****************************************************************
-Checks if mtr is the first to modify any page after online_backup_lsn. */
-static
-ibool
-mtr_first_to_modify_page_after_backup(
-/*==================================*/
-				/* out: TRUE if first for a page */
-	mtr_t*	mtr,		/* in: mini-transaction */
-	ulint*	n_pages)	/* out: number of modified pages (all modified
-				pages, backup_lsn does not matter here) */
-{
-	mtr_memo_slot_t* slot;
-	dyn_array_t*	memo;
-	ulint		offset;
-	buf_block_t*	block;
-	ulint		type;
-	dulint		backup_lsn;
-	ibool		ret	= FALSE;
-
-	ut_ad(mtr);
-	ut_ad(mtr->magic_n == MTR_MAGIC_N);
-	ut_ad(mtr->state == MTR_COMMITTING);
-
-	backup_lsn = log_get_online_backup_lsn_low();
-	
-	memo = &(mtr->memo);
-	
-	offset = dyn_array_get_data_size(memo);
-
-	*n_pages = 0;
-	
-	while (offset > 0) {
-		offset -= sizeof(mtr_memo_slot_t);
-		slot = dyn_array_get_element(memo, offset);
-
-		block = slot->object;
-		type = slot->type;
-
-		if ((block != NULL) && (type == MTR_MEMO_PAGE_X_FIX)) {
-
-			*n_pages = *n_pages + 1;
-
-			if (ut_dulint_cmp(buf_frame_get_newest_modification(
-								block->frame),
-							backup_lsn) <= 0) {
-
-				fprintf(stderr,
-					"Page %lu newest %lu backup %lu\n",
-					block->offset,
-					ut_dulint_get_low(
-					buf_frame_get_newest_modification(
-							block->frame)),
-					ut_dulint_get_low(backup_lsn));
-					
-				ret = TRUE;
-			}
-		}
-	}
-
-	return(ret);
-}
-	
 /****************************************************************
 Writes the contents of a mini-transaction log, if any, to the database log. */
 static
@@ -291,7 +118,6 @@ mtr_log_reserve_and_write(
 	ulint		data_size;
 	ibool		success;
 	byte*		first_data;
-	ulint		n_modified_pages;
 
 	ut_ad(mtr);
 
@@ -322,27 +148,12 @@ mtr_log_reserve_and_write(
 
 	if (mtr->log_mode == MTR_LOG_ALL) {
 
-		if (log_get_online_backup_state_low()
-		    && mtr_first_to_modify_page_after_backup(mtr,
-		    					&n_modified_pages)) {
-		    	
-			/* The database is in the online backup state: write
-			to the log the full contents of all the pages if this
-			mtr is the first to modify any page in the buffer pool
-			after online_backup_lsn */
-
-			log_close();
-			log_release();
-		
-			mtr_log_write_backup_full_pages(mtr, n_modified_pages);
-		} else {
-			block = mlog;
+		block = mlog;
 
-			while (block != NULL) {
-				log_write_low(dyn_block_get_data(block),
-						dyn_block_get_used(block));
-				block = dyn_array_get_next_block(mlog, block);
-			}
+		while (block != NULL) {
+			log_write_low(dyn_block_get_data(block),
+					dyn_block_get_used(block));
+			block = dyn_array_get_next_block(mlog, block);
 		}
 	} else {
 		ut_ad(mtr->log_mode == MTR_LOG_NONE);