Maria: when logs have been manually deleted, last_logno and last_checkpoint_lsn

must be updated correctly. And Recovery should not assume that
log 1 is available but just use first available log.


mysql-test/r/maria-purge.result:
  result update
mysql-test/t/maria-purge.test:
  like in other Maria tests (4294967296 is too big, causes warning)
storage/maria/ma_loghandler.c:
  When log handler starts and discovers that logs are missing though
  control file says they should be there (they have been manually
  deleted), it decides to create a log
  with number last_logno+1. It needs to update control file with
  this new number, and also reset last_checkpoint_lsn to LSN_IMPOSSIBLE
  (last checkpoint went away when log was deleted).
  Fix for when translog_init() fails before allocating id_to_share
  (translog_destroy() tried to free NULL).
storage/maria/ma_recovery.c:
  When logs have been manually deleted, translog_first_theoretical_lsn()
  always fails (it looks for log number 1). Recovery now uses
  translog_first_lsn_in_log() which just picks the first available log.

mysql-test/r/maria-purge.result

 set global storage_engine=maria;
 set session storage_engine=maria;
-set global maria_log_file_size=4294967296;
+set global maria_log_file_size=4294967295;
 drop table if exists t1,t2;
 SET SQL_WARNINGS=1;
 CREATE TABLE t1 (

mysql-test/t/maria-purge.test

@@ -6,7 +6,7 @@ set session storage_engine=maria;
 let $def_logsize=`select @@global.maria_log_file_size`;
 let $def_checkinterval=`select @@global.maria_checkpoint_interval`;
 
-set global maria_log_file_size=4294967296;
+set global maria_log_file_size=4294967295;
 # Initialise
 --disable_warnings
 drop table if exists t1,t2;

storage/maria/ma_loghandler.c

@@ -3073,7 +3073,7 @@ my_bool translog_init_with_table(const char *directory,
   int old_log_was_recovered= 0, logs_found= 0;
   uint old_flags= flags;
   uint32 start_file_num= 1;
-  TRANSLOG_ADDRESS sure_page, last_page, last_valid_page;
+  TRANSLOG_ADDRESS sure_page, last_page, last_valid_page, checkpoint_lsn;
   my_bool version_changed= 0;
   DBUG_ENTER("translog_init_with_table");
 
@@ -3161,13 +3161,6 @@ my_bool translog_init_with_table(const char *directory,
               log_descriptor.buffer_capacity_chunk_2,
               log_descriptor.half_buffer_capacity_chunk_2));
 
-  /*
-    last_logno and last_checkpoint_lsn were set in
-    ma_control_file_create_or_open()
-  */
-  logs_found= (last_logno != FILENO_IMPOSSIBLE);
-
-
   /* Just to init it somehow (hack for bootstrap)*/
   {
     TRANSLOG_FILE *file= 0;
@@ -3196,6 +3189,7 @@ my_bool translog_init_with_table(const char *directory,
   logs_found= (last_logno != FILENO_IMPOSSIBLE);
 
   translog_status= (readonly ? TRANSLOG_READONLY : TRANSLOG_OK);
+  checkpoint_lsn= last_checkpoint_lsn;
 
   if (logs_found)
   {
@@ -3226,8 +3220,12 @@ my_bool translog_init_with_table(const char *directory,
     {
       if (!translog_is_log_files())
       {
-        /* files was deleted, just start from the next log number */
+        /*
+          Files was deleted, just start from the next log number, so that
+          existing tables are in the past.
+        */
         start_file_num= last_logno + 1;
+        checkpoint_lsn= LSN_IMPOSSIBLE; /* no log so no checkpoint */
         logs_found= 0;
       }
       else
@@ -3471,8 +3469,8 @@ my_bool translog_init_with_table(const char *directory,
     DBUG_ASSERT(log_descriptor.max_file - log_descriptor.min_file + 1 ==
                 log_descriptor.open_files.elements);
 
-    if (ma_control_file_write_and_force(LSN_IMPOSSIBLE, 1,
-                                        CONTROL_FILE_UPDATE_ONLY_LOGNO))
+    if (ma_control_file_write_and_force(checkpoint_lsn, start_file_num,
+                                        CONTROL_FILE_UPDATE_ALL))
       DBUG_RETURN(1);
     /* assign buffer 0 */
     translog_start_buffer(log_descriptor.buffers, &log_descriptor.bc, 0);
@@ -3742,7 +3740,8 @@ void translog_destroy()
 
   my_close(log_descriptor.directory_fd, MYF(MY_WME));
   my_atomic_rwlock_destroy(&LOCK_id_to_share);
-  my_free((uchar*)(id_to_share + 1), MYF(MY_ALLOW_ZERO_PTR));
+  if (id_to_share != NULL)
+    my_free((uchar*)(id_to_share + 1), MYF(MY_WME));
   DBUG_VOID_RETURN;
 }
 

storage/maria/ma_recovery.c

@@ -312,13 +312,8 @@ int maria_apply_log(LSN from_lsn, enum maria_apply_log_way apply,
   {
     if (last_checkpoint_lsn == LSN_IMPOSSIBLE)
     {
-      from_lsn= translog_first_theoretical_lsn();
-      /*
-        as far as we have not yet any checkpoint then the very first
-        log file should be present.
-      */
-      if (unlikely((from_lsn == LSN_IMPOSSIBLE) ||
-                   (from_lsn == LSN_ERROR)))
+      from_lsn= translog_first_lsn_in_log();
+      if (unlikely(from_lsn == LSN_ERROR))
         goto err;
     }
     else