MDEV-16416 Crash on IMPORT TABLESPACE of a ROW_FORMAT=COMPRESSED table

fil_iterate(): Invoke fil_encrypt_buf() correctly when
a ROW_FORMAT=COMPRESSED table with a physical page size of
innodb_page_size is being imported. Also, validate the page checksum
before decryption, and reduce the scope of some variables.

AbstractCallback::operator()(): Remove the parameter 'offset'.
The check for it in FetchIndexRootPages::operator() was basically
redundant and dead code since the previous refactoring.

4 files changed, 147 insertions, 181 deletions

diff --git a/mysql-test/suite/encryption/r/innodb-discard-import.result b/mysql-test/suite/encryption/r/innodb-discard-import.result
index 06f4abab9f4..406460d0a23 100644
--- a/mysql-test/suite/encryption/r/innodb-discard-import.result
+++ b/mysql-test/suite/encryption/r/innodb-discard-import.result
@@ -1,5 +1,8 @@
 call mtr.add_suppression("InnoDB: Tablespace for table .* is set as discarded.");
 call mtr.add_suppression("InnoDB: Cannot calculate statistics for table .* because the .ibd file is missing. Please refer to .* for how to resolve the issue.");
+SET @innodb_file_format_orig = @@GLOBAL.innodb_file_format;
+SET @innodb_file_per_table_orig = @@GLOBAL.innodb_file_per_table;
+SET @innodb_compression_algo = @@GLOBAL.innodb_compression_algorithm;
 SET GLOBAL innodb_file_format = `Barracuda`;
 SET GLOBAL innodb_file_per_table = ON;
 SET GLOBAL innodb_compression_algorithm = 1;
@@ -134,3 +137,6 @@ NOT FOUND /tmpres/ in t3.ibd
 NOT FOUND /mysql/ in t4.ibd
 DROP PROCEDURE innodb_insert_proc;
 DROP TABLE t1,t2,t3,t4;
+SET GLOBAL innodb_file_format = @innodb_file_format_orig;
+SET GLOBAL innodb_file_per_table = @innodb_file_per_table_orig;
+SET GLOBAL innodb_compression_algorithm = @innodb_compression_algo;
diff --git a/mysql-test/suite/encryption/t/innodb-discard-import.test b/mysql-test/suite/encryption/t/innodb-discard-import.test
index 9feaacc41e5..54471ae3bae 100644
--- a/mysql-test/suite/encryption/t/innodb-discard-import.test
+++ b/mysql-test/suite/encryption/t/innodb-discard-import.test
@@ -1,10 +1,6 @@
 -- source include/have_innodb.inc
+-- source include/innodb_page_size_small.inc
 -- source include/have_file_key_management_plugin.inc
-# embedded does not support restart
--- source include/not_embedded.inc
--- source include/not_valgrind.inc
-# Avoid CrashReporter popup on Mac
--- source include/not_crashrep.inc
 
 #
 # MDEV-8770: Incorrect error message when importing page compressed tablespace
@@ -13,17 +9,13 @@
 call mtr.add_suppression("InnoDB: Tablespace for table .* is set as discarded.");
 call mtr.add_suppression("InnoDB: Cannot calculate statistics for table .* because the .ibd file is missing. Please refer to .* for how to resolve the issue.");
 
---disable_query_log
-let $innodb_file_format_orig = `SELECT @@innodb_file_format`;
-let $innodb_file_per_table_orig = `SELECT @@innodb_file_per_table`;
-let $innodb_compression_algo = `SELECT @@innodb_compression_algorithm`;
---enable_query_log
+SET @innodb_file_format_orig = @@GLOBAL.innodb_file_format;
+SET @innodb_file_per_table_orig = @@GLOBAL.innodb_file_per_table;
+SET @innodb_compression_algo = @@GLOBAL.innodb_compression_algorithm;
 
---disable_warnings
 SET GLOBAL innodb_file_format = `Barracuda`;
 SET GLOBAL innodb_file_per_table = ON;
 SET GLOBAL innodb_compression_algorithm = 1;
---enable_warnings
 
 --let $MYSQLD_TMPDIR = `SELECT @@tmpdir`
 --let $MYSQLD_DATADIR = `SELECT @@datadir`
@@ -37,7 +29,9 @@ create table t1(c1 bigint not null, b char(200))  engine=innodb encrypted=yes en
 show warnings;
 create table t2(c1 bigint not null, b char(200))  engine=innodb page_compressed=1 encrypted=yes encryption_key_id=4;
 show warnings;
-create table t3(c1 bigint not null, b char(200))  engine=innodb row_format=compressed encrypted=yes encryption_key_id=4;
+let $kbs= `select floor(@@global.innodb_page_size/1024)`;
+--replace_regex / key_block_size=\d+//i
+eval create table t3(c1 bigint not null, b char(200))  engine=innodb row_format=compressed encrypted=yes encryption_key_id=4 key_block_size=$kbs;
 show warnings;
 create table t4(c1 bigint not null, b char(200))  engine=innodb page_compressed=1;
 show warnings;
@@ -98,6 +92,7 @@ ALTER TABLE t2 IMPORT TABLESPACE;
 SHOW CREATE TABLE t2;
 SELECT COUNT(*) FROM t2;
 ALTER TABLE t3 IMPORT TABLESPACE;
+--replace_regex / key_block_size=\d+//i
 SHOW CREATE TABLE t3;
 SELECT COUNT(*) FROM t3;
 ALTER TABLE t4 IMPORT TABLESPACE;
@@ -125,11 +120,6 @@ SELECT COUNT(*) FROM t4;
 DROP PROCEDURE innodb_insert_proc;
 DROP TABLE t1,t2,t3,t4;
 
-# reset system
---disable_warnings
---disable_query_log
-EVAL SET GLOBAL innodb_file_per_table = $innodb_file_per_table_orig;
-EVAL SET GLOBAL innodb_file_format = $innodb_file_format_orig;
-EVAL SET GLOBAL innodb_compression_algorithm = $innodb_compression_algo;
---enable_query_log
---enable_warnings
+SET GLOBAL innodb_file_format = @innodb_file_format_orig;
+SET GLOBAL innodb_file_per_table = @innodb_file_per_table_orig;
+SET GLOBAL innodb_compression_algorithm = @innodb_compression_algo;
diff --git a/storage/innobase/row/row0import.cc b/storage/innobase/row/row0import.cc
index dfd6b4bfbea..9ce172f1d07 100644
--- a/storage/innobase/row/row0import.cc
+++ b/storage/innobase/row/row0import.cc
@@ -427,12 +427,9 @@ public:
 	updated then its state must be set to BUF_PAGE_NOT_USED. For
 	compressed tables the page descriptor memory will be at offset:
 		block->frame + UNIV_PAGE_SIZE;
-	@param offset - physical offset within the file
-	@param block - block read from file, note it is not from the buffer pool
+	@param block block read from file, note it is not from the buffer pool
 	@retval DB_SUCCESS or error code. */
-	virtual dberr_t operator()(
-		os_offset_t	offset,
-		buf_block_t*	block) UNIV_NOTHROW = 0;
+	virtual dberr_t operator()(buf_block_t* block) UNIV_NOTHROW = 0;
 
 	/**
 	@return the space id of the tablespace */
@@ -689,12 +686,9 @@ struct FetchIndexRootPages : public AbstractCallback {
 
 	/**
 	Called for each block as it is read from the file.
-	@param offset - physical offset in the file
-	@param block - block to convert, it is not from the buffer pool.
+	@param block block to convert, it is not from the buffer pool.
 	@retval DB_SUCCESS or error code. */
-	virtual dberr_t operator() (
-		os_offset_t	offset,
-		buf_block_t*	block) UNIV_NOTHROW;
+	dberr_t operator()(buf_block_t* block) UNIV_NOTHROW;
 
 	/** Update the import configuration that will be used to import
 	the tablespace. */
@@ -712,13 +706,9 @@ Called for each block as it is read from the file. Check index pages to
 determine the exact row format. We can't get that from the tablespace
 header flags alone.
 
-@param offset - physical offset in the file
-@param block - block to convert, it is not from the buffer pool.
+@param block block to convert, it is not from the buffer pool.
 @retval DB_SUCCESS or error code. */
-dberr_t
-FetchIndexRootPages::operator() (
-	os_offset_t	offset,
-	buf_block_t*	block) UNIV_NOTHROW
+dberr_t FetchIndexRootPages::operator()(buf_block_t* block) UNIV_NOTHROW
 {
 	if (is_interrupted()) return DB_INTERRUPTED;
 
@@ -726,15 +716,7 @@ FetchIndexRootPages::operator() (
 
 	ulint	page_type = fil_page_get_type(page);
 
-	if (block->page.offset * m_page_size != offset) {
-		ib_logf(IB_LOG_LEVEL_ERROR,
-			"Page offset doesn't match file offset: "
-			"page offset: %u, file offset: " ULINTPF,
-			block->page.offset,
-			(ulint) (offset / m_page_size));
-
-		return DB_CORRUPTION;
-	} else if (page_type == FIL_PAGE_TYPE_XDES) {
+	if (page_type == FIL_PAGE_TYPE_XDES) {
 		return set_current_xdes(block->page.offset, page);
 	} else if (page_type == FIL_PAGE_INDEX
 		   && !is_free(block->page.offset)
@@ -877,12 +859,9 @@ public:
 
 	/**
 	Called for each block as it is read from the file.
-	@param offset - physical offset in the file
-	@param block - block to convert, it is not from the buffer pool.
+	@param block block to convert, it is not from the buffer pool.
 	@retval DB_SUCCESS or error code. */
-	virtual dberr_t operator() (
-		os_offset_t	offset,
-		buf_block_t*	block) UNIV_NOTHROW;
+	dberr_t operator()(buf_block_t* block) UNIV_NOTHROW;
 private:
 	/**
 	Update the page, set the space id, max trx id and index id.
@@ -2039,10 +2018,9 @@ PageConverter::update_page(
 /**
 Called for every page in the tablespace. If the page was not
 updated then its state must be set to BUF_PAGE_NOT_USED.
-@param block - block read from file, note it is not from the buffer pool
+@param block block read from file, note it is not from the buffer pool
 @retval DB_SUCCESS or error code. */
-dberr_t
-PageConverter::operator() (os_offset_t, buf_block_t* block) UNIV_NOTHROW
+dberr_t PageConverter::operator()(buf_block_t* block) UNIV_NOTHROW
 {
 	/* If we already had an old page with matching number
 	in the buffer pool, evict it now, because
@@ -3430,26 +3408,15 @@ fil_iterate(
 		}
 
 		bool		updated = false;
-		os_offset_t	page_off = offset;
 		ulint		n_pages_read = (ulint) n_bytes / iter.page_size;
 		const ulint 	size = iter.page_size;
-		block->page.offset = page_off / size;
+		block->page.offset = offset / size;
 
 		for (ulint i = 0; i < n_pages_read;
-		     ++i, page_off += size, block->frame += size,
-		     block->page.offset++) {
-			bool decrypted = false;
-			dberr_t	err = DB_SUCCESS;
+		     ++i, block->frame += size, block->page.offset++) {
 			byte*	src = readptr + (i * size);
-			byte*	dst = io_buffer + (i * size);
-			bool frame_changed = false;
-			ulint page_type = mach_read_from_2(src+FIL_PAGE_TYPE);
-			const bool page_compressed
-				= page_type
-				== FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED
-				|| page_type == FIL_PAGE_PAGE_COMPRESSED;
 			const ulint page_no = page_get_page_no(src);
-			if (!page_no && page_off) {
+			if (!page_no && block->page.offset) {
 				const ulint* b = reinterpret_cast<const ulint*>
 					(src);
 				const ulint* const e = b + size / sizeof *b;
@@ -3464,11 +3431,46 @@ fil_iterate(
 				continue;
 			}
 
-			if (page_no != page_off / size) {
-				goto page_corrupted;
+			if (page_no != block->page.offset) {
+page_corrupted:
+				ib_logf(IB_LOG_LEVEL_WARN,
+					"%s: Page %lu at offset "
+					UINT64PF " looks corrupted.",
+					callback.filename(),
+					ulong(offset / size), offset);
+				return DB_CORRUPTION;
 			}
 
-			if (encrypted) {
+			bool decrypted = false;
+			dberr_t	err = DB_SUCCESS;
+			byte*	dst = io_buffer + (i * size);
+			bool frame_changed = false;
+			ulint page_type = mach_read_from_2(src+FIL_PAGE_TYPE);
+			const bool page_compressed
+				= page_type
+				== FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED
+				|| page_type == FIL_PAGE_PAGE_COMPRESSED;
+
+			if (!encrypted) {
+			} else if (!mach_read_from_4(
+					   FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION
+					   + src)) {
+not_encrypted:
+				if (!page_compressed
+				    && !block->page.zip.data) {
+					block->frame = src;
+					frame_changed = true;
+				} else {
+					ut_ad(dst != src);
+					memcpy(dst, src, size);
+				}
+			} else {
+				if (!fil_space_verify_crypt_checksum(
+					    src, callback.get_zip_size(),
+					    NULL, block->page.offset)) {
+					goto page_corrupted;
+				}
+
 				decrypted = fil_space_decrypt(
 					iter.crypt_data, dst,
 					iter.page_size, src, &err);
@@ -3477,18 +3479,11 @@ fil_iterate(
 					return err;
 				}
 
-				if (decrypted) {
-					updated = true;
-				} else {
-					if (!page_compressed
-					    && !block->page.zip.data) {
-						block->frame = src;
-						frame_changed = true;
-					} else {
-						ut_ad(dst != src);
-						memcpy(dst, src, size);
-					}
+				if (!decrypted) {
+					goto not_encrypted;
 				}
+
+				updated = true;
 			}
 
 			/* If the original page is page_compressed, we need
@@ -3502,16 +3497,10 @@ fil_iterate(
 					   encrypted && !frame_changed
 					   ? dst : src,
 					   callback.get_zip_size(), NULL)) {
-page_corrupted:
-				ib_logf(IB_LOG_LEVEL_WARN,
-					"%s: Page %lu at offset "
-					UINT64PF " looks corrupted.",
-					callback.filename(),
-					ulong(offset / size), offset);
-				return DB_CORRUPTION;
+				goto page_corrupted;
 			}
 
-			if ((err = callback(page_off, block)) != DB_SUCCESS) {
+			if ((err = callback(block)) != DB_SUCCESS) {
 				return err;
 			} else if (!updated) {
 				updated = buf_block_get_state(block)
@@ -3584,19 +3573,15 @@ page_corrupted:
 			buffer pool is not being used at all! */
 			if (decrypted && encrypted) {
 				byte *dest = writeptr + (i * size);
-				ulint space = mach_read_from_4(
-					src + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID);
-				ulint offset = mach_read_from_4(src + FIL_PAGE_OFFSET);
-				ib_uint64_t lsn = mach_read_from_8(src + FIL_PAGE_LSN);
 
 				byte* tmp = fil_encrypt_buf(
-							iter.crypt_data,
-							space,
-							offset,
-							lsn,
-							src,
-							iter.page_size == UNIV_PAGE_SIZE ? 0 : iter.page_size,
-							dest);
+					iter.crypt_data,
+					callback.get_space_id(),
+					block->page.offset,
+					mach_read_from_8(src + FIL_PAGE_LSN),
+					src,
+					callback.get_zip_size(),
+					dest);
 
 				if (tmp == src) {
 					/* TODO: remove unnecessary memcpy's */
diff --git a/storage/xtradb/row/row0import.cc b/storage/xtradb/row/row0import.cc
index a3478dc2fc4..2b08c819b6d 100644
--- a/storage/xtradb/row/row0import.cc
+++ b/storage/xtradb/row/row0import.cc
@@ -427,12 +427,9 @@ public:
 	updated then its state must be set to BUF_PAGE_NOT_USED. For
 	compressed tables the page descriptor memory will be at offset:
 		block->frame + UNIV_PAGE_SIZE;
-	@param offset - physical offset within the file
-	@param block - block read from file, note it is not from the buffer pool
+	@param block block read from file, note it is not from the buffer pool
 	@retval DB_SUCCESS or error code. */
-	virtual dberr_t operator()(
-		os_offset_t	offset,
-		buf_block_t*	block) UNIV_NOTHROW = 0;
+	virtual dberr_t operator()(buf_block_t* block) UNIV_NOTHROW = 0;
 
 	/**
 	@return the space id of the tablespace */
@@ -689,12 +686,9 @@ struct FetchIndexRootPages : public AbstractCallback {
 
 	/**
 	Called for each block as it is read from the file.
-	@param offset - physical offset in the file
-	@param block - block to convert, it is not from the buffer pool.
+	@param block block to convert, it is not from the buffer pool.
 	@retval DB_SUCCESS or error code. */
-	virtual dberr_t operator() (
-		os_offset_t	offset,
-		buf_block_t*	block) UNIV_NOTHROW;
+	dberr_t operator()(buf_block_t* block) UNIV_NOTHROW;
 
 	/** Update the import configuration that will be used to import
 	the tablespace. */
@@ -712,13 +706,9 @@ Called for each block as it is read from the file. Check index pages to
 determine the exact row format. We can't get that from the tablespace
 header flags alone.
 
-@param offset - physical offset in the file
-@param block - block to convert, it is not from the buffer pool.
+@param block block to convert, it is not from the buffer pool.
 @retval DB_SUCCESS or error code. */
-dberr_t
-FetchIndexRootPages::operator() (
-	os_offset_t	offset,
-	buf_block_t*	block) UNIV_NOTHROW
+dberr_t FetchIndexRootPages::operator()(buf_block_t* block) UNIV_NOTHROW
 {
 	if (is_interrupted()) return DB_INTERRUPTED;
 
@@ -726,15 +716,7 @@ FetchIndexRootPages::operator() (
 
 	ulint	page_type = fil_page_get_type(page);
 
-	if (block->page.offset * m_page_size != offset) {
-		ib_logf(IB_LOG_LEVEL_ERROR,
-			"Page offset doesn't match file offset: "
-			"page offset: %u, file offset: " ULINTPF,
-			block->page.offset,
-			(ulint) (offset / m_page_size));
-
-		return DB_CORRUPTION;
-	} else if (page_type == FIL_PAGE_TYPE_XDES) {
+	if (page_type == FIL_PAGE_TYPE_XDES) {
 		return set_current_xdes(block->page.offset, page);
 	} else if (page_type == FIL_PAGE_INDEX
 		   && !is_free(block->page.offset)
@@ -877,12 +859,9 @@ public:
 
 	/**
 	Called for each block as it is read from the file.
-	@param offset - physical offset in the file
-	@param block - block to convert, it is not from the buffer pool.
+	@param block block to convert, it is not from the buffer pool.
 	@retval DB_SUCCESS or error code. */
-	virtual dberr_t operator() (
-		os_offset_t	offset,
-		buf_block_t*	block) UNIV_NOTHROW;
+	dberr_t operator()(buf_block_t* block) UNIV_NOTHROW;
 private:
 	/**
 	Update the page, set the space id, max trx id and index id.
@@ -2038,10 +2017,9 @@ PageConverter::update_page(
 /**
 Called for every page in the tablespace. If the page was not
 updated then its state must be set to BUF_PAGE_NOT_USED.
-@param block - block read from file, note it is not from the buffer pool
+@param block block read from file, note it is not from the buffer pool
 @retval DB_SUCCESS or error code. */
-dberr_t
-PageConverter::operator() (os_offset_t, buf_block_t* block) UNIV_NOTHROW
+dberr_t PageConverter::operator()(buf_block_t* block) UNIV_NOTHROW
 {
 	/* If we already had an old page with matching number
 	in the buffer pool, evict it now, because
@@ -3429,26 +3407,15 @@ fil_iterate(
 		}
 
 		bool		updated = false;
-		os_offset_t	page_off = offset;
 		ulint		n_pages_read = (ulint) n_bytes / iter.page_size;
 		const ulint 	size = iter.page_size;
-		block->page.offset = page_off / size;
+		block->page.offset = offset / size;
 
 		for (ulint i = 0; i < n_pages_read;
-		     ++i, page_off += size, block->frame += size,
-		     block->page.offset++) {
-			bool decrypted = false;
-			dberr_t	err = DB_SUCCESS;
+		     ++i, block->frame += size, block->page.offset++) {
 			byte*	src = readptr + (i * size);
-			byte*	dst = io_buffer + (i * size);
-			bool frame_changed = false;
-			ulint page_type = mach_read_from_2(src+FIL_PAGE_TYPE);
-			const bool page_compressed
-				= page_type
-				== FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED
-				|| page_type == FIL_PAGE_PAGE_COMPRESSED;
 			const ulint page_no = page_get_page_no(src);
-			if (!page_no && page_off) {
+			if (!page_no && block->page.offset) {
 				const ulint* b = reinterpret_cast<const ulint*>
 					(src);
 				const ulint* const e = b + size / sizeof *b;
@@ -3463,11 +3430,46 @@ fil_iterate(
 				continue;
 			}
 
-			if (page_no != page_off / size) {
-				goto page_corrupted;
+			if (page_no != block->page.offset) {
+page_corrupted:
+				ib_logf(IB_LOG_LEVEL_WARN,
+					"%s: Page %lu at offset "
+					UINT64PF " looks corrupted.",
+					callback.filename(),
+					ulong(offset / size), offset);
+				return DB_CORRUPTION;
 			}
 
-			if (encrypted) {
+			bool decrypted = false;
+			dberr_t	err = DB_SUCCESS;
+			byte*	dst = io_buffer + (i * size);
+			bool frame_changed = false;
+			ulint page_type = mach_read_from_2(src+FIL_PAGE_TYPE);
+			const bool page_compressed
+				= page_type
+				== FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED
+				|| page_type == FIL_PAGE_PAGE_COMPRESSED;
+
+			if (!encrypted) {
+			} else if (!mach_read_from_4(
+					   FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION
+					   + src)) {
+not_encrypted:
+				if (!page_compressed
+				    && !block->page.zip.data) {
+					block->frame = src;
+					frame_changed = true;
+				} else {
+					ut_ad(dst != src);
+					memcpy(dst, src, size);
+				}
+			} else {
+				if (!fil_space_verify_crypt_checksum(
+					    src, callback.get_zip_size(),
+					    NULL, block->page.offset)) {
+					goto page_corrupted;
+				}
+
 				decrypted = fil_space_decrypt(
 					iter.crypt_data, dst,
 					iter.page_size, src, &err);
@@ -3476,18 +3478,11 @@ fil_iterate(
 					return err;
 				}
 
-				if (decrypted) {
-					updated = true;
-				} else {
-					if (!page_compressed
-					    && !block->page.zip.data) {
-						block->frame = src;
-						frame_changed = true;
-					} else {
-						ut_ad(dst != src);
-						memcpy(dst, src, size);
-					}
+				if (!decrypted) {
+					goto not_encrypted;
 				}
+
+				updated = true;
 			}
 
 			/* If the original page is page_compressed, we need
@@ -3501,16 +3496,10 @@ fil_iterate(
 					   encrypted && !frame_changed
 					   ? dst : src,
 					   callback.get_zip_size(), NULL)) {
-page_corrupted:
-				ib_logf(IB_LOG_LEVEL_WARN,
-					"%s: Page %lu at offset "
-					UINT64PF " looks corrupted.",
-					callback.filename(),
-					ulong(offset / size), offset);
-				return DB_CORRUPTION;
+				goto page_corrupted;
 			}
 
-			if ((err = callback(page_off, block)) != DB_SUCCESS) {
+			if ((err = callback(block)) != DB_SUCCESS) {
 				return err;
 			} else if (!updated) {
 				updated = buf_block_get_state(block)
@@ -3583,19 +3572,15 @@ page_corrupted:
 			buffer pool is not being used at all! */
 			if (decrypted && encrypted) {
 				byte *dest = writeptr + (i * size);
-				ulint space = mach_read_from_4(
-					src + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID);
-				ulint offset = mach_read_from_4(src + FIL_PAGE_OFFSET);
-				ib_uint64_t lsn = mach_read_from_8(src + FIL_PAGE_LSN);
 
 				byte* tmp = fil_encrypt_buf(
-							iter.crypt_data,
-							space,
-							offset,
-							lsn,
-							src,
-							iter.page_size == UNIV_PAGE_SIZE ? 0 : iter.page_size,
-							dest);
+					iter.crypt_data,
+					callback.get_space_id(),
+					block->page.offset,
+					mach_read_from_8(src + FIL_PAGE_LSN),
+					src,
+					callback.get_zip_size(),
+					dest);
 
 				if (tmp == src) {
 					/* TODO: remove unnecessary memcpy's */