Revert reverted patch (as workaround) to have no problem with ongoing fix.

storage/xtradb/buf/buf0buf.c

@@ -581,6 +581,8 @@ UNIV_INTERN
 ibool
 buf_page_is_corrupted(
 /*==================*/
+	ibool		check_lsn,	/*!< in: TRUE if we need to check
+					and complain about the LSN */
 	const byte*	read_buf,	/*!< in: a database page */
 	ulint		zip_size)	/*!< in: size of compressed page;
 					0 for uncompressed pages */
@@ -600,7 +602,7 @@ buf_page_is_corrupted(
 	}
 
 #ifndef UNIV_HOTBACKUP
-	if (recv_lsn_checks_on) {
+	if (check_lsn && recv_lsn_checks_on) {
 		ib_uint64_t	current_lsn;
 
 		if (log_peek_lsn(&current_lsn)
@@ -3945,7 +3947,7 @@ buf_page_io_complete(
 		/* From version 3.23.38 up we store the page checksum
 		to the 4 first bytes of the page end lsn field */
 
-		if (buf_page_is_corrupted(frame,
+		if (buf_page_is_corrupted(TRUE, frame,
 					  buf_page_get_zip_size(bpage))) {
 corrupt:
 			fprintf(stderr,

storage/xtradb/fil/fil0fil.c

 /*****************************************************************************
 
-Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved.
+Copyright (c) 1995, 2013, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -1883,11 +1883,63 @@ fil_write_flushed_lsn_to_data_files(
 	return(DB_SUCCESS);
 }
 
+/*******************************************************************//**
+Checks the consistency of the first data page of a data file
+at database startup.
+@retval NULL on success, or if innodb_force_recovery is set
+@return pointer to an error message string */
+static __attribute__((warn_unused_result))
+const char*
+fil_check_first_page(
+/*=================*/
+	const page_t*	page,		/*!< in: data page */
+	ibool		first_page)	/*!< in: TRUE if this is the
+					first page of the tablespace */
+{
+	ulint	space_id;
+	ulint	flags;
+
+	if (srv_force_recovery >= SRV_FORCE_IGNORE_CORRUPT) {
+		return(NULL);
+	}
+
+	space_id = mach_read_from_4(FSP_HEADER_OFFSET + FSP_SPACE_ID + page);
+	flags = mach_read_from_4(FSP_HEADER_OFFSET + FSP_SPACE_FLAGS + page);
+
+	if (first_page && !space_id && !flags) {
+		ulint		nonzero_bytes	= UNIV_PAGE_SIZE;
+		const byte*	b		= page;
+
+		while (!*b && --nonzero_bytes) {
+			b++;
+		}
+
+		if (!nonzero_bytes) {
+			return("space header page consists of zero bytes");
+		}
+	}
+
+	if (buf_page_is_corrupted(
+		    FALSE, page, dict_table_flags_to_zip_size(flags))) {
+		return("checksum mismatch");
+	}
+
+	if (!first_page
+	    || (page_get_space_id(page) == space_id
+		&& page_get_page_no(page) == 0)) {
+		return(NULL);
+	}
+
+	return("inconsistent data in space header");
+}
+
 /*******************************************************************//**
 Reads the flushed lsn, arch no, and tablespace flag fields from a data
-file at database startup. */
+file at database startup.
+@retval NULL on success, or if innodb_force_recovery is set
+@return pointer to an error message string */
 UNIV_INTERN
-void
+const char*
 fil_read_first_page(
 /*================*/
 	os_file_t	data_file,		/*!< in: open data file */
@@ -1909,6 +1961,7 @@ fil_read_first_page(
 	byte*		buf;
 	page_t*		page;
 	ib_uint64_t	flushed_lsn;
+	const char*	check_msg;
 
 	buf = ut_malloc(2 * UNIV_PAGE_SIZE);
 	/* Align the memory for a possible read from a raw device */
@@ -1916,13 +1969,18 @@ fil_read_first_page(
 
 	os_file_read(data_file, page, 0, 0, UNIV_PAGE_SIZE);
 
-	*flags = mach_read_from_4(page +
-		FSP_HEADER_OFFSET + FSP_SPACE_FLAGS);
+	*flags = mach_read_from_4(FSP_HEADER_OFFSET + FSP_SPACE_FLAGS + page);
 
 	flushed_lsn = mach_read_from_8(page + FIL_PAGE_FILE_FLUSH_LSN);
 
+	check_msg = fil_check_first_page(page, !one_read_already);
+
 	ut_free(buf);
 
+	if (check_msg) {
+		return(check_msg);
+	}
+
 	if (!one_read_already) {
 		*min_flushed_lsn = flushed_lsn;
 		*max_flushed_lsn = flushed_lsn;
@@ -1930,7 +1988,7 @@ fil_read_first_page(
 		*min_arch_log_no = arch_log_no;
 		*max_arch_log_no = arch_log_no;
 #endif /* UNIV_LOG_ARCHIVE */
-		return;
+		return(NULL);
 	}
 
 	if (*min_flushed_lsn > flushed_lsn) {
@@ -1947,6 +2005,8 @@ fil_read_first_page(
 		*max_arch_log_no = arch_log_no;
 	}
 #endif /* UNIV_LOG_ARCHIVE */
+
+	return(NULL);
 }
 
 /*================ SINGLE-TABLE TABLESPACES ==========================*/
@@ -3271,6 +3331,7 @@ fil_open_single_table_tablespace(
 	os_file_t	file;
 	char*		filepath;
 	ibool		success;
+	const char*	check_msg;
 	byte*		buf2;
 	byte*		page;
 	ulint		space_id;
@@ -3331,6 +3392,8 @@ fil_open_single_table_tablespace(
 
 	success = os_file_read(file, page, 0, 0, UNIV_PAGE_SIZE);
 
+	check_msg = fil_check_first_page(page, TRUE);
+
 	/* We have to read the tablespace id and flags from the file. */
 
 	space_id = fsp_header_get_space_id(page);
@@ -3366,7 +3429,7 @@ fil_open_single_table_tablespace(
 		current_lsn = log_get_lsn();
 
 		/* check the header page's consistency */
-		if (buf_page_is_corrupted(page,
+		if (buf_page_is_corrupted(TRUE, page,
 					  dict_table_flags_to_zip_size(space_flags))) {
 			fprintf(stderr, "InnoDB: page 0 of %s seems corrupt.\n", filepath);
 			file_is_corrupt = TRUE;
@@ -3788,8 +3851,20 @@ fil_open_single_table_tablespace(
 
 	ut_free(buf2);
 
-	if (UNIV_UNLIKELY(space_id != id
-			  || space_flags != (flags & ~(~0 << DICT_TF_BITS)))) {
+	if (check_msg) {
+		ut_print_timestamp(stderr);
+		fprintf(stderr, "  InnoDB: Error: %s in file ", check_msg);
+		ut_print_filename(stderr, filepath);
+		fprintf(stderr, " (tablespace id=%lu, flags=%lu)\n"
+			"InnoDB: Please refer to " REFMAN
+			"innodb-troubleshooting-datadict.html\n",
+			(ulong) id, (ulong) flags);
+		success = FALSE;
+		goto func_exit;
+	}
+
+	if (space_id != id
+	    || space_flags != (flags & ~(~0 << DICT_TF_BITS))) {
 		ut_print_timestamp(stderr);
 
 		fputs("  InnoDB: Error: tablespace id and flags in file ",
@@ -4280,11 +4355,21 @@ fil_load_single_table_tablespace(
 	page = ut_align(buf2, UNIV_PAGE_SIZE);
 
 	if (size >= FIL_IBD_FILE_INITIAL_SIZE * (lint)UNIV_PAGE_SIZE) {
+		const char*	check_msg;
 
 		success = os_file_read(file, page, 0, 0, UNIV_PAGE_SIZE);
 
 		/* We have to read the tablespace id from the file */
 
+		check_msg = fil_check_first_page(page, TRUE);
+
+		if (check_msg) {
+			fprintf(stderr,
+				"InnoDB: Error: %s in file %s",
+				check_msg, filepath);
+			goto func_exit;
+		}
+
 		space_id = fsp_header_get_space_id(page);
 		flags = fsp_header_get_flags(page);
 	} else {

storage/xtradb/include/buf0buf.h

 /*****************************************************************************
 
-Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 1995, 2013, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -684,9 +684,12 @@ UNIV_INTERN
 ibool
 buf_page_is_corrupted(
 /*==================*/
+	ibool		check_lsn,	/*!< in: TRUE if we need to check
+					and complain about the LSN */
 	const byte*	read_buf,	/*!< in: a database page */
-	ulint		zip_size);	/*!< in: size of compressed page;
+	ulint		zip_size)	/*!< in: size of compressed page;
 					0 for uncompressed pages */
+	__attribute__((warn_unused_result));
 #ifndef UNIV_HOTBACKUP
 /**********************************************************************//**
 Gets the space id, page offset, and byte offset within page of a

storage/xtradb/include/fil0fil.h

 /*****************************************************************************
 
-Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved.
+Copyright (c) 1995, 2013, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -328,10 +328,12 @@ fil_write_flushed_lsn_to_data_files(
 	ulint		arch_log_no);	/*!< in: latest archived log
 					file number */
 /*******************************************************************//**
-Reads the flushed lsn and arch no fields from a data file at database
-startup. */
+Reads the flushed lsn, arch no, and tablespace flag fields from a data
+file at database startup.
+@retval NULL on success, or if innodb_force_recovery is set
+@return pointer to an error message string */
 UNIV_INTERN
-void
+const char*
 fil_read_first_page(
 /*================*/
 	os_file_t	data_file,		/*!< in: open data file */
@@ -347,8 +349,9 @@ fil_read_first_page(
 #endif /* UNIV_LOG_ARCHIVE */
 	ib_uint64_t*	min_flushed_lsn,	/*!< out: min of flushed
 						lsn values in data files */
-	ib_uint64_t*	max_flushed_lsn);	/*!< out: max of flushed
+	ib_uint64_t*	max_flushed_lsn)	/*!< out: max of flushed
 						lsn values in data files */
+	__attribute__((warn_unused_result));
 /*******************************************************************//**
 Increments the count of pending operation, if space is not being deleted.
 @return	TRUE if being deleted, and operation should be skipped */

storage/xtradb/srv/srv0start.c

 /*****************************************************************************
 
-Copyright (c) 1996, 2010, Innobase Oy. All Rights Reserved.
+Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
 Copyright (c) 2008, Google Inc.
 Copyright (c) 2009, Percona Inc.
 
@@ -817,6 +817,7 @@ open_or_create_data_files(
 		}
 
 		if (ret == FALSE) {
+			const char* check_msg;
 			/* We open the data file */
 
 			if (one_created) {
@@ -914,13 +915,20 @@ open_or_create_data_files(
 				return(DB_ERROR);
 			}
 skip_size_check:
-			fil_read_first_page(
+			check_msg = fil_read_first_page(
 				files[i], one_opened, &flags,
 #ifdef UNIV_LOG_ARCHIVE
 				min_arch_log_no, max_arch_log_no,
 #endif /* UNIV_LOG_ARCHIVE */
 				min_flushed_lsn, max_flushed_lsn);
 
+			if (check_msg) {
+				fprintf(stderr,
+					"InnoDB: Error: %s in data file %s\n",
+					check_msg, name);
+				return(DB_ERROR);
+			}
+
 			if (!one_opened
 			    && UNIV_PAGE_SIZE
 			       != fsp_flags_get_page_size(flags)) {
@@ -1042,6 +1050,8 @@ open_or_create_data_files(
 
 		if (ret == FALSE) {
 
+			const char* check_msg;
+
 			/* We open the data file */
 
 			files[i] = os_file_create(innodb_file_data_key,
@@ -1078,13 +1088,20 @@ open_or_create_data_files(
 					(ulong) TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * 9);
 			}
 
-			fil_read_first_page(
+			check_msg = fil_read_first_page(
 				files[i], one_opened, &flags,
 #ifdef UNIV_LOG_ARCHIVE
 				min_arch_log_no, max_arch_log_no,
 #endif /* UNIV_LOG_ARCHIVE */
 				min_flushed_lsn, max_flushed_lsn);
 
+			if (check_msg) {
+				fprintf(stderr,
+					"InnoDB: Error: %s in doublewrite "
+					"buffer file %s\n", check_msg, name);
+				return(DB_ERROR);
+			}
+
 			one_opened = TRUE;
 		} else {
 			/* We created the data file and now write it full of

storage/xtradb/trx/trx0sys.c

 /*****************************************************************************
 
-Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 1996, 2013, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -726,7 +726,8 @@ trx_sys_doublewrite_init_or_restore_pages(
 			/* Check if the page is corrupt */
 
 			if (UNIV_UNLIKELY
-			    (buf_page_is_corrupted(read_buf, zip_size))) {
+			    (buf_page_is_corrupted(
+				    TRUE, read_buf, zip_size))) {
 
 				fprintf(stderr,
 					"InnoDB: Warning: database page"
@@ -737,7 +738,8 @@ trx_sys_doublewrite_init_or_restore_pages(
 					" the doublewrite buffer.\n",
 					(ulong) space_id, (ulong) page_no);
 
-				if (buf_page_is_corrupted(page, zip_size)) {
+				if (buf_page_is_corrupted(
+					    TRUE, page, zip_size)) {
 					fprintf(stderr,
 						"InnoDB: Dump of the page:\n");
 					buf_page_print(