branches/zip: Stamp some header fields to compressed BLOB pages.

buf_flush_init_for_writing(): On FIL_PAGE_TYPE_ZBLOB, write to
page_zip->data instead of page.

page_zip_write_rec(), page_zip_write_blob_ptr(), page_zip_write_node_ptr():
Add ut_ad(page_simple_validate_new()).

buf/buf0flu.c

@@ -495,10 +495,14 @@ buf_flush_init_for_writing(
 
 		switch (UNIV_EXPECT(fil_page_get_type(page), FIL_PAGE_INDEX)) {
 		case FIL_PAGE_TYPE_ZBLOB:
-			mach_write_to_4(page + FIL_PAGE_OFFSET, page_no);
-			mach_write_to_4(page + FIL_PAGE_ZBLOB_SPACE_ID, space);
-			mach_write_to_8(page + FIL_PAGE_LSN, newest_lsn);
-			mach_write_to_4(page + FIL_PAGE_SPACE_OR_CHKSUM,
+			mach_write_to_4(page_zip->data
+					+ FIL_PAGE_OFFSET, page_no);
+			mach_write_to_4(page_zip->data
+					+ FIL_PAGE_ZBLOB_SPACE_ID, space);
+			mach_write_to_8(page_zip->data
+					+ FIL_PAGE_LSN, newest_lsn);
+			mach_write_to_4(page_zip->data
+					+ FIL_PAGE_SPACE_OR_CHKSUM,
 					srv_use_checksums
 					? page_zip_calc_checksum(
 							page, zip_size)

page/page0zip.c

@@ -2111,6 +2111,7 @@ page_zip_write_rec(
 	page = ut_align_down((rec_t*) rec, UNIV_PAGE_SIZE);
 
 	ut_ad(page_zip_header_cmp(page_zip, page));
+	ut_ad(page_simple_validate_new(page));
 
 	slot = page_zip_dir_find(page_zip,
 			ut_align_offset(rec, UNIV_PAGE_SIZE));
@@ -2402,6 +2403,7 @@ page_zip_write_blob_ptr(
 	ulint	len;
 
 	ut_ad(buf_block_get_page_zip(buf_block_align((byte*)rec)) == page_zip);
+	ut_ad(page_simple_validate_new(page));
 	ut_ad(page_zip_simple_validate(page_zip));
 	ut_ad(page_zip->size > PAGE_DATA + page_zip_dir_size(page_zip));
 	ut_ad(rec_offs_comp(offsets));
@@ -2555,6 +2557,7 @@ page_zip_write_node_ptr(
 	page_t*	page	= buf_frame_align(rec);
 
 	ut_ad(buf_block_get_page_zip(buf_block_align(rec)) == page_zip);
+	ut_ad(page_simple_validate_new(page));
 	ut_ad(page_zip_simple_validate(page_zip));
 	ut_ad(page_zip->size > PAGE_DATA + page_zip_dir_size(page_zip));
 	ut_ad(page_rec_is_comp(rec));
@@ -2619,6 +2622,7 @@ page_zip_write_trx_id_and_roll_ptr(
 	ulint	len;
 
 	ut_ad(buf_block_get_page_zip(buf_block_align(rec)) == page_zip);
+	ut_ad(page_simple_validate_new(page));
 	ut_ad(page_zip_simple_validate(page_zip));
 	ut_ad(page_zip->size > PAGE_DATA + page_zip_dir_size(page_zip));
 	ut_ad(rec_offs_validate(rec, NULL, offsets));