Aria bug fixes and improvements:

- Fixed performance bug in alter table with Aria; Aria didn't use disable keys + enable keys
- Fixed wrong warning about 'Wrong CRC on datapage' from REPAIR TABLE with aria block tables.
- Fixed bug in aria_chk that disabled performance counters.
- Added --translog_buffer_size to maria_read_log.

storage/maria/ha_maria.cc:
  Fixed performance bug in alter table with Aria; Aria didn't use disable keys + enable keys
storage/maria/ma_bitmap.c:
  Added some DBUG_ASSERT()'s and made code more uniform
storage/maria/ma_check.c:
  Fixed wrong warning about 'Wrong CRC on datapage' from REPAIR TABLE with aria block tables.
storage/maria/ma_pagecache.c:
  Copy read pages to buffer even if there was an error (to be able to detect zero filled pages)
storage/maria/maria_chk.c:
  Fixed bug in aria_chk that disabled performance counters.
storage/maria/maria_read_log.c:
  Added option to set translog_buffer_size

storage/maria/ha_maria.cc

@@ -1966,19 +1966,21 @@ void ha_maria::start_bulk_insert(ha_rows rows)
        we don't want to update the key statistics based of only a few rows.
        Index file rebuild requires an exclusive lock, so if versioning is on
        don't do it (see how ha_maria::store_lock() tries to predict repair).
-       We can repair index only if we have an exclusive (TL_WRITE) lock. To
-       see if table is empty, we shouldn't rely on the old records' count from
-       our transaction's start (if that old count is 0 but now there are
-       records in the table, we would wrongly destroy them).
-       So we need to look at share->state.state.records.
-       As a safety net for now, we don't remove the test of
-       file->state->records, because there is uncertainty on what will happen
-       during repair if the two states disagree.
+       We can repair index only if we have an exclusive (TL_WRITE) lock or
+       if this is inside an ALTER TABLE, in which case lock_type == TL_UNLOCK.
+
+       To see if table is empty, we shouldn't rely on the old record
+       count from our transaction's start (if that old count is 0 but
+       now there are records in the table, we would wrongly destroy
+       them).  So we need to look at share->state.state.records.  As a
+       safety net for now, we don't remove the test of
+       file->state->records, because there is uncertainty on what will
+       happen during repair if the two states disagree.
     */
     if ((file->state->records == 0) &&
         (share->state.state.records == 0) && can_enable_indexes &&
         (!rows || rows >= MARIA_MIN_ROWS_TO_DISABLE_INDEXES) &&
-        (file->lock.type == TL_WRITE))
+        (file->lock.type == TL_WRITE || file->lock.type == TL_UNLOCK))
     {
       /**
          @todo for a single-row INSERT SELECT, we will go into repair, which

storage/maria/ma_bitmap.c

@@ -1061,14 +1061,18 @@ static my_bool move_to_next_bitmap(MARIA_HA *info, MARIA_FILE_BITMAP *bitmap)
   MARIA_STATE_INFO *state= &info->s->state;
   DBUG_ENTER("move_to_next_bitmap");
 
-  if (state->first_bitmap_with_space != ~(ulonglong) 0 &&
+  if (state->first_bitmap_with_space != ~(pgcache_page_no_t) 0 &&
       state->first_bitmap_with_space != page)
   {
     page= state->first_bitmap_with_space;
-    state->first_bitmap_with_space= ~(ulonglong) 0;
+    state->first_bitmap_with_space= ~(pgcache_page_no_t) 0;
+    DBUG_ASSERT(page % bitmap->pages_covered == 0);
   }
   else
+  {
     page+= bitmap->pages_covered;
+    DBUG_ASSERT(page % bitmap->pages_covered == 0);
+  }
   DBUG_RETURN(_ma_change_bitmap_page(info, bitmap, page));
 }
 
@@ -2039,8 +2043,7 @@ my_bool _ma_bitmap_find_new_place(MARIA_HA *info, MARIA_ROW *row,
     goto abort;
 
   /* Switch bitmap to current head page */
-  bitmap_page= page / share->bitmap.pages_covered;
-  bitmap_page*= share->bitmap.pages_covered;
+  bitmap_page= page - page % share->bitmap.pages_covered;
 
   if (share->bitmap.page != bitmap_page &&
       _ma_change_bitmap_page(info, &share->bitmap, bitmap_page))

storage/maria/ma_check.c

@@ -6511,6 +6511,17 @@ static void copy_data_file_state(MARIA_STATE_INFO *to,
 }
 
 
+/* Return 1 if block is full of zero's */
+
+static my_bool zero_filled_block(uchar *tmp, uint length)
+{
+  while (length--)
+    if (*(tmp++) != 0)
+      return 0;
+  return 1;
+}
+
+
 /*
   Read 'safely' next record while scanning table.
 
@@ -6612,9 +6623,21 @@ read_next_page:
       {
         if (my_errno == HA_ERR_WRONG_CRC)
         {
-          _ma_check_print_info(sort_info->param,
-                               "Wrong CRC on datapage at %s",
-                               llstr(page, llbuff));
+          /*
+            Don't give errors for zero filled blocks. These can
+            sometimes be found at end of a bitmap when we wrote a big
+            record last that was moved to the next bitmap.
+          */
+          if (!zero_filled_block(info->scan.page_buff, share->block_size) ||
+              _ma_check_bitmap_data(info, UNALLOCATED_PAGE, 0, 
+                                    _ma_bitmap_get_page_bits(info,
+                                                             &share->bitmap,
+                                                             page)))
+          {
+            _ma_check_print_info(sort_info->param,
+                                 "Wrong CRC on datapage at %s",
+                                 llstr(page, llbuff));
+          }
           continue;
         }
         DBUG_RETURN(my_errno);

storage/maria/ma_pagecache.c

@@ -3519,7 +3519,7 @@ restart:
     }
     else
     {
-      if (!(status & PCBLOCK_ERROR))
+      if (status & PCBLOCK_READ)
       {
 #if !defined(SERIALIZED_READ_FROM_CACHE)
         pagecache_pthread_mutex_unlock(&pagecache->cache_lock);
@@ -3533,7 +3533,7 @@ restart:
         pagecache_pthread_mutex_lock(&pagecache->cache_lock);
 #endif
       }
-      else
+      if (status & PCBLOCK_ERROR)
         my_errno= block->error;
     }
 

storage/maria/maria_chk.c

@@ -878,9 +878,9 @@ static void get_options(register int *argc,register char ***argv)
 
   load_defaults("my", load_default_groups, argc, argv);
   default_argv= *argv;
+  check_param.testflag= T_UPDATE_STATE;
   if (isatty(fileno(stdout)))
     check_param.testflag|=T_WRITE_LOOP;
-  check_param.testflag= T_UPDATE_STATE;
 
   if ((ho_error=handle_options(argc, argv, my_long_options, get_one_option)))
     exit(ho_error);

storage/maria/maria_read_log.c

@@ -32,7 +32,7 @@ const char *default_dbug_option= "d:t:o,/tmp/aria_read_log.trace";
 static my_bool opt_display_only, opt_apply, opt_apply_undo, opt_silent;
 static my_bool opt_check;
 static const char *opt_tmpdir;
-static ulong opt_page_buffer_size;
+static ulong opt_page_buffer_size, opt_translog_buffer_size;
 static ulonglong opt_start_from_lsn, opt_end_lsn, opt_start_from_checkpoint;
 static MY_TMPDIR maria_chk_tmpdir;
 
@@ -80,9 +80,8 @@ int main(int argc, char **argv)
     But if it finds a log and this log was crashed, it will create a new log,
     which is useless. TODO: start log handler in read-only mode.
   */
-  if (init_pagecache(maria_log_pagecache,
-                     TRANSLOG_PAGECACHE_SIZE, 0, 0,
-                     TRANSLOG_PAGE_SIZE, MY_WME) == 0 ||
+  if (init_pagecache(maria_log_pagecache, opt_translog_buffer_size,
+                     0, 0, TRANSLOG_PAGE_SIZE, MY_WME) == 0 ||
       translog_init(maria_data_root, TRANSLOG_FILE_SIZE,
                     0, 0, maria_log_pagecache, TRANSLOG_DEFAULT_FLAGS,
                     opt_display_only))
@@ -166,7 +165,7 @@ err:
 #include "ma_check_standalone.h"
 
 enum options_mc {
-  OPT_CHARSETS_DIR=256, OPT_FORCE_CRASH
+  OPT_CHARSETS_DIR=256, OPT_FORCE_CRASH, OPT_TRANSLOG_BUFFER_SIZE
 };
 
 static struct my_option my_long_options[] =
@@ -228,6 +227,12 @@ static struct my_option my_long_options[] =
    "colon (:)"
 #endif
    , (char**) &opt_tmpdir, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
+  { "translog-buffer-size", OPT_TRANSLOG_BUFFER_SIZE,
+    "The size of the buffer used for transaction log for Aria tables",
+    &opt_translog_buffer_size, &opt_translog_buffer_size, 0,
+    GET_ULONG, REQUIRED_ARG, (long) TRANSLOG_PAGECACHE_SIZE,
+    1024L*1024L, (long) ~(ulong) 0, (long) MALLOC_OVERHEAD,
+    (long) IO_SIZE, 0},
   {"undo", 'u', "Apply UNDO records to tables. (disable with --disable-undo)",
    (uchar **) &opt_apply_undo, (uchar **) &opt_apply_undo, 0,
    GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0},