When scanning pages, stop when you are at 'data_file_length'.

This fixes a bug that gave ER_FILE_TOO_SHORT error when scanning Aria tables.

storage/maria/ma_blockrec.c:
  Changed code so that we update share->state.state.data_file_length after page cache write is done.
  When scanning pages, stop when you are at 'data_file_length'.
  (We can't trust the bitmap as there may be reserved pages in the bitmap that are not yet written).
  This fixes a bug that gave ER_FILE_TOO_SHORT error when scanning Aria tables.
storage/maria/maria_def.h:
  Updated struct for stopping scanning at end of file

storage/maria/ma_blockrec.c

@@ -1993,19 +1993,6 @@ static my_bool write_tail(MARIA_HA *info,
   /* Keep BLOCKUSED_USE_ORG_BITMAP */
   block->used|= BLOCKUSED_USED | BLOCKUSED_TAIL;
 
-  /* Increase data file size, if extended */
-  position= (my_off_t) block->page * block_size;
-  if (share->state.state.data_file_length <= position)
-  {
-    /*
-      We are modifying a state member before writing the UNDO; this is a WAL
-      violation. But for data_file_length this is ok, as long as we change
-      data_file_length after writing any log record (FILE_ID/REDO/UNDO) (see
-      collect_tables()).
-    */
-    _ma_set_share_data_file_length(share, position + block_size);
-  }
-
   if (block_is_read)
   {
     /* Current page link is last element in pinned_pages */
@@ -2021,7 +2008,9 @@ static my_bool write_tail(MARIA_HA *info,
     page_link->unlock= PAGECACHE_LOCK_READ_UNLOCK;
     res= 0;
   }
-  else if (!(res= pagecache_write(share->pagecache,
+  else
+  {
+    if (!(res= pagecache_write(share->pagecache,
                                &info->dfile, block->page, 0,
                                row_pos.buff,share->page_type,
                                PAGECACHE_LOCK_READ,
@@ -2033,6 +2022,20 @@ static my_bool write_tail(MARIA_HA *info,
       page_link.changed= 1;
       push_dynamic(&info->pinned_pages, (void*) &page_link);
     }
+
+    /* Increase data file size, if extended */
+    position= (my_off_t) block->page * block_size;
+    if (share->state.state.data_file_length <= position)
+    {
+      /*
+        We are modifying a state member before writing the UNDO; this is a WAL
+        violation. But for data_file_length this is ok, as long as we change
+        data_file_length after writing any log record (FILE_ID/REDO/UNDO) (see
+        collect_tables()).
+      */
+      _ma_set_share_data_file_length(share, position + block_size);
+    }
+  }
   DBUG_RETURN(res);
 }
 
@@ -2068,7 +2071,7 @@ static my_bool write_full_pages(MARIA_HA *info,
   uint data_size= FULL_PAGE_SIZE(block_size);
   uchar *buff= info->keyread_buff;
   uint page_count, sub_blocks;
-  my_off_t position;
+  my_off_t position, max_position;
   DBUG_ENTER("write_full_pages");
   DBUG_PRINT("enter", ("length: %lu  page: %lu  page_count: %lu",
                        (ulong) length, (ulong) block->page,
@@ -2080,9 +2083,7 @@ static my_bool write_full_pages(MARIA_HA *info,
   page_count= block->page_count;
   sub_blocks= block->sub_blocks;
 
-  position= (my_off_t) (page + page_count) * block_size;
-  if (share->state.state.data_file_length < position)
-    _ma_set_share_data_file_length(share, position);
+  max_position= (my_off_t) (page + page_count) * block_size;
 
   /* Increase data file size, if extended */
 
@@ -2105,8 +2106,7 @@ static my_bool write_full_pages(MARIA_HA *info,
                           (ulong) block->page, (ulong) block->page_count));
 
       position= (page + page_count + 1) * block_size;
-      if (share->state.state.data_file_length < position)
-        _ma_set_share_data_file_length(share, position);
+      set_if_bigger(max_position, position);
     }
     lsn_store(buff, lsn);
     buff[PAGE_TYPE_OFFSET]= (uchar) BLOB_PAGE;
@@ -2134,6 +2134,8 @@ static my_bool write_full_pages(MARIA_HA *info,
     page++;
     DBUG_ASSERT(block->used & BLOCKUSED_USED);
   }
+  if (share->state.state.data_file_length < max_position)
+    _ma_set_share_data_file_length(share, max_position);
   DBUG_RETURN(0);
 }
 
@@ -3121,11 +3123,6 @@ static my_bool write_block_record(MARIA_HA *info,
   }
 #endif
 
-  /* Increase data file size, if extended */
-  position= (my_off_t) head_block->page * block_size;
-  if (share->state.state.data_file_length <= position)
-    _ma_set_share_data_file_length(share, position + block_size);
-
   if (head_block_is_read)
   {
     MARIA_PINNED_PAGE *page_link;
@@ -3154,6 +3151,11 @@ static my_bool write_block_record(MARIA_HA *info,
     page_link.unlock= PAGECACHE_LOCK_READ_UNLOCK;
     page_link.changed= 1;
     push_dynamic(&info->pinned_pages, (void*) &page_link);
+
+    /* Increase data file size, if extended */
+    position= (my_off_t) head_block->page * block_size;
+    if (share->state.state.data_file_length <= position)
+      _ma_set_share_data_file_length(share, position + block_size);
   }
 
   if (share->now_transactional && (tmp_data_used || blob_full_pages_exists))
@@ -5162,6 +5164,7 @@ my_bool _ma_scan_init_block_record(MARIA_HA *info)
   info->scan.number_of_rows= 0;
   info->scan.bitmap_pos= info->scan.bitmap_end;
   info->scan.bitmap_page= (pgcache_page_no_t) 0 - share->bitmap.pages_covered;
+  info->scan.max_page= share->state.state.data_file_length / share->block_size;
   /*
     We need to flush what's in memory (bitmap.map) to page cache otherwise, as
     we are going to read bitmaps from page cache in table scan (see
@@ -5363,6 +5366,11 @@ int _ma_scan_block_record(MARIA_HA *info, uchar *record,
           page= (info->scan.bitmap_page + 1 +
                  (data - info->scan.bitmap_buff) / 6 * 16 + bit_pos - 1);
           info->scan.row_base_page= ma_recordpos(page, 0);
+          if (page >= info->scan.max_page)
+          {
+            DBUG_PRINT("info", ("Found end of file"));
+            DBUG_RETURN((my_errno= HA_ERR_END_OF_FILE));
+          }
           if (!(pagecache_read(share->pagecache,
                                &info->dfile,
                                page, 0, info->scan.page_buff,

storage/maria/maria_def.h

@@ -476,7 +476,7 @@ typedef struct st_maria_block_scan
 {
   uchar *bitmap_buff, *bitmap_pos, *bitmap_end, *page_buff;
   uchar *dir, *dir_end;
-  pgcache_page_no_t bitmap_page;
+  pgcache_page_no_t bitmap_page, max_page;
   ulonglong bits;
   uint number_of_rows, bit_pos;
   MARIA_RECORD_POS row_base_page;