MDEV-13105 InnoDB fails to load a table with PAGE_COMPRESSION_LEVEL after upgrade from 10.1.20

When using innodb_page_size=16k, InnoDB tables
that were created in MariaDB 10.1.0 to 10.1.20 with
PAGE_COMPRESSED=1 and
PAGE_COMPRESSION_LEVEL=2 or PAGE_COMPRESSION_LEVEL=3
would fail to load.

fsp_flags_is_valid(): When using innodb_page_size=16k, use a
more strict check for .ibd files, with the assumption that
nobody would try to use different-page-size files.

extra/mariabackup/fil_cur.cc

@@ -219,7 +219,7 @@ xb_fil_cur_open(
 		return(XB_FIL_CUR_SKIP);
 	}
 
-	if (!fsp_flags_is_valid(flags)) {
+	if (!fsp_flags_is_valid(flags, cursor->space_id)) {
 		ulint cflags = fsp_flags_convert_from_101(flags);
 		if (cflags == ULINT_UNDEFINED) {
 			msg("[%02u] xtrabackup: Error: Invalid "

mysql-test/suite/innodb/include/ibd_convert.pl

@@ -11,7 +11,7 @@ sub convert_to_mariadb_101
     # FIL_PAGE_DATA + FSP_SPACE_FLAGS = 38 + 16 = 54 bytes from the start
     my($flags) = unpack "x[54]N", $_;
     my $badflags = ($flags & 0x3f);
-    my $compression_level=6;
+    my $compression_level=3;
     $badflags |= 1<<6|$compression_level<<7 if ($flags & 1 << 16);
     $badflags |= ($flags & 15 << 6) << 7; # PAGE_SSIZE
 

mysql-test/suite/innodb/r/101_compatibility.result

@@ -9,7 +9,7 @@ SET INNODB_STRICT_MODE=OFF;
 CREATE TABLE tz(a INT)ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=1;
 SET INNODB_STRICT_MODE=ON;
 CREATE TABLE tdd(a INT) ENGINE=InnoDB, DATA DIRECTORY='MYSQL_TMP_DIR';
-CREATE TABLE tp(a INT) ENGINE=InnoDB page_compressed=1;
+CREATE TABLE tp(a INT) ENGINE=InnoDB ROW_FORMAT=DYNAMIC PAGE_COMPRESSED=1;
 CREATE TABLE ti(a INT) ENGINE=InnoDB;
 FLUSH TABLES ti FOR EXPORT;
 backup: ti

mysql-test/suite/innodb/t/101_compatibility.test

@@ -29,7 +29,7 @@ SET INNODB_STRICT_MODE=ON;
 --replace_result $MYSQL_TMP_DIR MYSQL_TMP_DIR
 EVAL CREATE TABLE tdd(a INT) ENGINE=InnoDB, DATA DIRECTORY='$MYSQL_TMP_DIR';
 
-CREATE TABLE tp(a INT) ENGINE=InnoDB page_compressed=1;
+CREATE TABLE tp(a INT) ENGINE=InnoDB ROW_FORMAT=DYNAMIC PAGE_COMPRESSED=1;
 CREATE TABLE ti(a INT) ENGINE=InnoDB;
 FLUSH TABLES ti FOR EXPORT;
 perl;

storage/innobase/buf/buf0dblwr.cc

@@ -659,7 +659,7 @@ buf_dblwr_process()
 		if (page_no == 0) {
 			/* Check the FSP_SPACE_FLAGS. */
 			ulint flags = fsp_header_get_flags(page);
-			if (!fsp_flags_is_valid(flags)
+			if (!fsp_flags_is_valid(flags, space_id)
 			    && fsp_flags_convert_from_101(flags)
 			    == ULINT_UNDEFINED) {
 				ib::warn() << "Ignoring a doublewrite copy"

storage/innobase/fil/fil0fil.cc

@@ -663,7 +663,7 @@ retry:
 		ut_free(buf2);
 		os_file_close(node->handle);
 
-		if (!fsp_flags_is_valid(flags)) {
+		if (!fsp_flags_is_valid(flags, space->id)) {
 			ulint cflags = fsp_flags_convert_from_101(flags);
 			if (cflags == ULINT_UNDEFINED) {
 				ib::error()
@@ -1601,7 +1601,7 @@ fil_space_create(
 	fil_space_t*	space;
 
 	ut_ad(fil_system);
-	ut_ad(fsp_flags_is_valid(flags & ~FSP_FLAGS_MEM_MASK));
+	ut_ad(fsp_flags_is_valid(flags & ~FSP_FLAGS_MEM_MASK, id));
 	ut_ad(purpose == FIL_TYPE_LOG
 	      || srv_page_size == UNIV_PAGE_SIZE_ORIG || flags != 0);
 
@@ -2388,7 +2388,7 @@ fil_op_write_log(
 	ulint		len;
 
 	ut_ad(first_page_no == 0);
-	ut_ad(fsp_flags_is_valid(flags));
+	ut_ad(fsp_flags_is_valid(flags, space_id));
 
 	/* fil_name_parse() requires that there be at least one path
 	separator and that the file path end with ".ibd". */
@@ -3794,7 +3794,7 @@ fil_ibd_create(
 	ut_ad(!srv_read_only_mode);
 	ut_a(space_id < SRV_LOG_SPACE_FIRST_ID);
 	ut_a(size >= FIL_IBD_FILE_INITIAL_SIZE);
-	ut_a(fsp_flags_is_valid(flags & ~FSP_FLAGS_MEM_MASK));
+	ut_a(fsp_flags_is_valid(flags & ~FSP_FLAGS_MEM_MASK, space_id));
 
 	/* Create the subdirectories in the path, if they are
 	not there already. */
@@ -4089,7 +4089,7 @@ fil_ibd_open(
 		return(DB_CORRUPTION);
 	}
 
-	ut_ad(fsp_flags_is_valid(flags & ~FSP_FLAGS_MEM_MASK));
+	ut_ad(fsp_flags_is_valid(flags & ~FSP_FLAGS_MEM_MASK, id));
 	df_default.init(space_name, flags);
 	df_dict.init(space_name, flags);
 	df_remote.init(space_name, flags);
@@ -4737,7 +4737,7 @@ void
 fsp_flags_try_adjust(ulint space_id, ulint flags)
 {
 	ut_ad(!srv_read_only_mode);
-	ut_ad(fsp_flags_is_valid(flags));
+	ut_ad(fsp_flags_is_valid(flags, space_id));
 
 	mtr_t	mtr;
 	mtr.start();

storage/innobase/fsp/fsp0file.cc

@@ -353,7 +353,7 @@ Datafile::read_first_page(bool read_only_mode)
 	if (m_order == 0) {
 		m_space_id = fsp_header_get_space_id(m_first_page);
 		m_flags = fsp_header_get_flags(m_first_page);
-		if (!fsp_flags_is_valid(m_flags)) {
+		if (!fsp_flags_is_valid(m_flags, m_space_id)) {
 			ulint cflags = fsp_flags_convert_from_101(m_flags);
 			if (cflags == ULINT_UNDEFINED) {
 				ib::error()
@@ -524,9 +524,7 @@ Datafile::validate_first_page(lsn_t* flush_lsn)
 	}
 
 	/* Check if the whole page is blank. */
-	if (error_txt == NULL
-	    && m_space_id == srv_sys_space.space_id()
-	    && !m_flags) {
+	if (error_txt == NULL && !m_space_id && !m_flags) {
 		const byte*	b		= m_first_page;
 		ulint		nonzero_bytes	= UNIV_PAGE_SIZE;
 
@@ -558,7 +556,7 @@ Datafile::validate_first_page(lsn_t* flush_lsn)
 		free_first_page();
 
 		return(DB_ERROR);
-	} else if (!fsp_flags_is_valid(m_flags)) {
+	} else if (!fsp_flags_is_valid(m_flags, m_space_id)) {
 		/* Tablespace flags must be valid. */
 		error_txt = "Tablespace flags are invalid";
 	} else if (page_get_page_no(m_first_page) != 0) {
@@ -799,7 +797,7 @@ Datafile::restore_from_doublewrite()
 	ulint	flags = mach_read_from_4(
 		FSP_HEADER_OFFSET + FSP_SPACE_FLAGS + page);
 
-	if (!fsp_flags_is_valid(flags)) {
+	if (!fsp_flags_is_valid(flags, m_space_id)) {
 		ulint cflags = fsp_flags_convert_from_101(flags);
 		if (cflags == ULINT_UNDEFINED) {
 			ib::warn()

storage/innobase/fsp/fsp0fsp.cc

@@ -682,7 +682,7 @@ fsp_header_init_fields(
 	ulint	flags)		/*!< in: tablespace flags (FSP_SPACE_FLAGS) */
 {
 	flags &= ~FSP_FLAGS_MEM_MASK;
-	ut_a(fsp_flags_is_valid(flags));
+	ut_a(fsp_flags_is_valid(flags, space_id));
 
 	mach_write_to_4(FSP_HEADER_OFFSET + FSP_SPACE_ID + page,
 			space_id);

storage/innobase/include/dict0dict.ic

@@ -878,7 +878,7 @@ dict_tf_to_fsp_flags(ulint table_flags)
 		fsp_flags |= FSP_FLAGS_MASK_PAGE_COMPRESSION;
 	}
 
-	ut_a(fsp_flags_is_valid(fsp_flags));
+	ut_a(fsp_flags_is_valid(fsp_flags, false));
 
 	if (DICT_TF_HAS_DATA_DIR(table_flags)) {
 		fsp_flags |= 1U << FSP_FLAGS_MEM_DATA_DIR;

storage/innobase/include/fsp0fsp.h

@@ -779,7 +779,7 @@ fsp_flags_convert_from_101(ulint flags)
 	flags = ((flags & 0x3f) | ssize << FSP_FLAGS_POS_PAGE_SSIZE
 		 | FSP_FLAGS_GET_PAGE_COMPRESSION_MARIADB101(flags)
 		 << FSP_FLAGS_POS_PAGE_COMPRESSION);
-	ut_ad(fsp_flags_is_valid(flags));
+	ut_ad(fsp_flags_is_valid(flags, false));
 	return(flags);
 }
 
@@ -793,7 +793,7 @@ bool
 fsp_flags_match(ulint expected, ulint actual)
 {
 	expected &= ~FSP_FLAGS_MEM_MASK;
-	ut_ad(fsp_flags_is_valid(expected));
+	ut_ad(fsp_flags_is_valid(expected, false));
 
 	if (actual == expected) {
 		return(true);

storage/innobase/include/fsp0space.h

@@ -129,7 +129,7 @@ public:
 	@param[in]	fsp_flags	tablespace flags */
 	void set_flags(ulint fsp_flags)
 	{
-		ut_ad(fsp_flags_is_valid(fsp_flags));
+		ut_ad(fsp_flags_is_valid(fsp_flags, false));
 		m_flags = fsp_flags;
 	}
 

storage/innobase/include/fsp0types.h

@@ -371,11 +371,12 @@ these are only used in MySQL 5.7 and used for compatibility. */
 /** Validate the tablespace flags, which are stored in the
 tablespace header at offset FSP_SPACE_FLAGS.
 @param[in]	flags	the contents of FSP_SPACE_FLAGS
+@param[in]	is_ibd	whether this is an .ibd file (not system tablespace)
 @return	whether the flags are correct (not in the buggy 10.1) format */
 MY_ATTRIBUTE((warn_unused_result, const))
 UNIV_INLINE
 bool
-fsp_flags_is_valid(ulint flags)
+fsp_flags_is_valid(ulint flags, bool is_ibd)
 {
 	DBUG_EXECUTE_IF("fsp_flags_is_valid_failure",
 			return(false););
@@ -422,7 +423,12 @@ fsp_flags_is_valid(ulint flags)
 		return(false);
 	}
 
-	return(true);
+	/* The flags do look valid. But, avoid misinterpreting
+	buggy MariaDB 10.1 format flags for
+	PAGE_COMPRESSED=1 PAGE_COMPRESSION_LEVEL={0,2,3}
+	as valid-looking PAGE_SSIZE if this is known to be
+	an .ibd file and we are using the default innodb_page_size=16k. */
+	return(ssize == 0 || !is_ibd || srv_page_size != UNIV_PAGE_SIZE_ORIG);
 }
 
 #endif /* fsp0types_h */

storage/innobase/row/row0import.cc

@@ -527,7 +527,7 @@ AbstractCallback::init(
 	const page_t*		page = block->frame;
 
 	m_space_flags = fsp_header_get_flags(page);
-	if (!fsp_flags_is_valid(m_space_flags)) {
+	if (!fsp_flags_is_valid(m_space_flags, true)) {
 		ulint cflags = fsp_flags_convert_from_101(m_space_flags);
 		if (cflags == ULINT_UNDEFINED) {
 			ib::error() << "Invalid FSP_SPACE_FLAGS="