WL#3072 Maria Recovery. Making DDLs durable in Maria:

Sync table files after CREATE (of non-temp table), DROP, RENAME,
TRUNCATE, sync directories and symlinks (for the 3 first commands).
Comments for future log records.
In ma_rename(), if rename of index works and then rename of data fails,
try to undo the rename of the index to leave a consistent state.


mysys/my_symlink.c:
  sync directory after creation of a symbolic link in it, if asked
mysys/my_sync.c:
  comment. Fix for when the file's name has no directory in it.
storage/maria/ma_create.c:
  sync files and links and dirs when creating a non-temporary table.
  Optimizations of the above to reduce syncs in the common cases:
  * if index file and data file have the exact same paths (regular
  and link), sync the directories (of regular and link) only once
  after creating the last file (the data file).
  * don't sync the data file if we didn't write to it (always true
  in our builds).
storage/maria/ma_delete_all.c:
  sync files after truncating a table
storage/maria/ma_delete_table.c:
  sync files and symbolic links and dirs after dropping a table
storage/maria/ma_extra.c:
  a function which wraps the sync of the index file and the sync of the
  data file.
storage/maria/ma_locking.c:
  using a wrapper function
storage/maria/ma_rename.c:
  sync files and symbolic links and dirs after renaming a table.
  If rename of index works and then rename of data fails, try to undo
  the rename of the index to leave a consistent state. That is just a
  try, it may fail...
storage/maria/ma_test3.c:
  warning to not pay attention to this test.
storage/maria/maria_def.h:
  declaration for the function added to ma_extra.c

1 files changed, 4 insertions, 0 deletions

diff --git a/storage/maria/ma_test3.c b/storage/maria/ma_test3.c
index 96b896b03c6..2f205c33b12 100644
--- a/storage/maria/ma_test3.c
+++ b/storage/maria/ma_test3.c
@@ -65,6 +65,10 @@ int main(int argc,char **argv)
   MY_INIT(argv[0]);
   get_options(argc,argv);
 
+  fprintf(stderr, "WARNING! this program is to test 'external locking'"
+          " (when several processes share a table through file locking)"
+          " which is not supported by Maria at all; expect errors."
+          " We may soon remove this program.\n");
   maria_init();
   bzero((char*) keyinfo,sizeof(keyinfo));
   bzero((char*) recinfo,sizeof(recinfo));