branches/zip: Distinguish temporary tables in MLOG_FILE_CREATE.

This addresses Mantis Issue #23 in InnoDB Hot Backup and some
of MySQL Bug #41609.

In MLOG_FILE_CREATE, we need to distinguish temporary tables, so that
InnoDB Hot Backup can work correctly.  It turns out that we can do this
easily, by using a bit of the previously unused parameter for page number.
(The page number parameter of MLOG_FILE_CREATE has been written as 0 
ever since MySQL 4.1, which introduced MLOG_FILE_CREATE.)

MLOG_FILE_FLAG_TEMP: A flag for indicating a temporary table in
the page number parameter of MLOG_FILE_ operations.

fil_op_write_log(): Add the parameter log_flags.

fil_op_log_parse_or_replay(): Add the parameter log_flags.
Do not replay MLOG_FILE_CREATE when MLOG_FILE_FLAG_TEMP is set in log_flags.
This only affects ibbackup --apply-log.  InnoDB itself never replays file
operations.

rb://117 approved by Heikki Tuuri

fil/fil0fil.c

@@ -1870,6 +1870,8 @@ fil_op_write_log(
 					MLOG_FILE_DELETE, or
 					MLOG_FILE_RENAME */
 	ulint		space_id,	/* in: space id */
+	ulint		log_flags,	/* in: redo log flags (stored
+					in the page number field) */
 	ulint		flags,		/* in: compressed page size
 					and file format
 					if type==MLOG_FILE_CREATE2, or 0 */
@@ -1893,8 +1895,8 @@ fil_op_write_log(
 		return;
 	}
 
-	log_ptr = mlog_write_initial_log_record_for_file_op(type, space_id, 0,
-							    log_ptr, mtr);
+	log_ptr = mlog_write_initial_log_record_for_file_op(
+		type, space_id, log_flags, log_ptr, mtr);
 	if (type == MLOG_FILE_CREATE2) {
 		mach_write_to_4(log_ptr, flags);
 		log_ptr += 4;
@@ -1947,9 +1949,11 @@ fil_op_log_parse_or_replay(
 				not fir completely between ptr and end_ptr */
 	byte*	end_ptr,	/* in: buffer end */
 	ulint	type,		/* in: the type of this log record */
-	ulint	space_id)	/* in: the space id of the tablespace in
+	ulint	space_id,	/* in: the space id of the tablespace in
 				question, or 0 if the log record should
 				only be parsed but not replayed */
+	ulint	log_flags)	/* in: redo log flags
+				(stored in the page number parameter) */
 {
 	ulint		name_len;
 	ulint		new_name_len;
@@ -2069,6 +2073,8 @@ fil_op_log_parse_or_replay(
 		} else if (fil_get_space_id_for_table(name)
 			   != ULINT_UNDEFINED) {
 			/* Do nothing */
+		} else if (log_flags & MLOG_FILE_FLAG_TEMP) {
+			/* Temporary table, do nothing */
 		} else {
 			/* Create the database directory for name, if it does
 			not exist yet */
@@ -2232,7 +2238,7 @@ fil_delete_tablespace(
 		to write any log record */
 		mtr_start(&mtr);
 
-		fil_op_write_log(MLOG_FILE_DELETE, id, 0, path, NULL, &mtr);
+		fil_op_write_log(MLOG_FILE_DELETE, id, 0, 0, path, NULL, &mtr);
 		mtr_commit(&mtr);
 #endif
 		mem_free(path);
@@ -2503,7 +2509,7 @@ fil_rename_tablespace(
 
 		mtr_start(&mtr);
 
-		fil_op_write_log(MLOG_FILE_RENAME, id, 0, old_name, new_name,
+		fil_op_write_log(MLOG_FILE_RENAME, id, 0, 0, old_name, new_name,
 				 &mtr);
 		mtr_commit(&mtr);
 	}
@@ -2707,7 +2713,9 @@ fil_create_new_single_table_tablespace(
 		fil_op_write_log(flags
 				 ? MLOG_FILE_CREATE2
 				 : MLOG_FILE_CREATE,
-				 *space_id, flags,
+				 *space_id,
+				 is_temp ? MLOG_FILE_FLAG_TEMP : 0,
+				 flags,
 				 tablename, NULL, &mtr);
 
 		mtr_commit(&mtr);

include/fil0fil.h

@@ -365,9 +365,11 @@ fil_op_log_parse_or_replay(
 				not fir completely between ptr and end_ptr */
 	byte*	end_ptr,	/* in: buffer end */
 	ulint	type,		/* in: the type of this log record */
-	ulint	space_id);	/* in: the space id of the tablespace in
+	ulint	space_id,	/* in: the space id of the tablespace in
 				question, or 0 if the log record should
 				only be parsed but not replayed */
+	ulint	log_flags);	/* in: redo log flags
+				(stored in the page number parameter) */
 /***********************************************************************
 Deletes a single-table tablespace. The tablespace must be cached in the
 memory cache. */

include/mtr0mtr.h

@@ -160,6 +160,12 @@ flag value must give the length also! */
 #define MLOG_BIGGEST_TYPE	((byte)51)	/* biggest value (used in
 						asserts) */
 
+/* Flags for MLOG_FILE operations (stored in the page number
+parameter, called log_flags in the functions).  The page number
+parameter was initially written as 0. */
+#define MLOG_FILE_FLAG_TEMP	1	/* identifies TEMPORARY TABLE in
+					MLOG_FILE_CREATE, MLOG_FILE_CREATE2 */
+
 /*******************************************************************
 Starts a mini-transaction and creates a mini-transaction handle
 and buffer in the memory buffer given by the caller. */

log/log0recv.c

@@ -1089,7 +1089,7 @@ recv_parse_or_apply_log_rec_body(
 	case MLOG_FILE_RENAME:
 	case MLOG_FILE_DELETE:
 	case MLOG_FILE_CREATE2:
-		ptr = fil_op_log_parse_or_replay(ptr, end_ptr, type, 0);
+		ptr = fil_op_log_parse_or_replay(ptr, end_ptr, type, 0, 0);
 		break;
 	case MLOG_ZIP_WRITE_NODE_PTR:
 		ut_ad(!page || page_type == FIL_PAGE_INDEX);
@@ -2139,7 +2139,8 @@ recv_parse_log_recs(
 				point to the datadir we should use there */
 
 				if (NULL == fil_op_log_parse_or_replay(
-					    body, end_ptr, type, space)) {
+					    body, end_ptr, type,
+					    space, page_no)) {
 					fprintf(stderr,
 						"InnoDB: Error: file op"
 						" log record of type %lu"