MDEV-3860 backport --plugin-load-add (and related mysql-test changes)

  revno: 3383
  revision-id: georgi.kodinov@oracle.com-20110818083108-qa3h3ufqu4zne80a
  committer: Georgi Kodinov <Georgi.Kodinov@Oracle.com>
  timestamp: Thu 2011-08-18 11:31:08 +0300
  message:

  Bug #11766001: 59026: ALLOW MULTIPLE --PLUGIN-LOAD OPTIONS
  
  Implemented support for a new command line option :
  --plugin-load-add=<comma-separated-name-equals-value-list>
  This option takes the same type of arguments that --plugin-load does
  and complements --plugin-load (that continues to operate as before) by
  appending its argument to the list specified by --plugin-load.
  So --plugin-load can be considered a composite option consisting of 
  resetting the plugin load list and then calling --plugin-load-add to process
  the argument.
  Note that the order in which you specify --plugin-load and --plugin-load-add 
  is important : "--plugin-load=x --plugin-load-add=y" will be equivalent to
  "--plugin-load=x,y" whereas "--plugin-load-add=y --plugin-load=x" will be 
  equivalent to "plugin-load=x".
  
  Incompatible change : the --help --verbose command will no longer print the 
  --plugin-load variable's values (as it doesn't have one). Otherwise both --plugin-load 
  and --plugin-load-add are mentioned in it.

mysql-test/include/have_archive.opt

 --loose-archive
---plugin-load=$HA_ARCHIVE_SO
+--plugin-load-add=$HA_ARCHIVE_SO

mysql-test/include/have_blackhole.opt

 --loose-blackhole
---plugin-load=$HA_BLACKHOLE_SO
+--plugin-load-add=$HA_BLACKHOLE_SO

mysql-test/include/have_innodb.combinations

 [innodb_plugin]
 ignore-builtin-innodb
-plugin-load=$HA_INNODB_SO
+plugin-load-add=$HA_INNODB_SO
 innodb
 innodb-cmpmem
 innodb-trx
 
 [xtradb_plugin]
 ignore-builtin-innodb
-plugin-load=$HA_XTRADB_SO
+plugin-load-add=$HA_XTRADB_SO
 innodb
 innodb-cmpmem
 innodb-trx

mysql-test/include/have_plugin_auth.opt

---plugin-load=$AUTH_TEST_PLUGIN_SO
+--plugin-load-add=$AUTH_TEST_PLUGIN_SO

mysql-test/include/have_xtradb.combinations

 [xtradb_plugin]
 ignore-builtin-innodb
-plugin-load=$HA_XTRADB_SO
+plugin-load-add=$HA_XTRADB_SO
 innodb
 innodb-cmpmem
 innodb-trx

mysql-test/include/plugin.defs

@@ -9,6 +9,7 @@
 # PLUGVAR_DIR: name of directory where plugin was found
 # PLUGVAR_OPT: mysqld option --plugin_dir=....
 # PLUGVAR_LOAD: option --plugin_load=.... if the 4th element is present
+# PLUGVAR_LOAD_ADD: option --plugin_load_add=.... if the 4th element is present
 #
 # If a listed plugin is not found, the corresponding variables will be
 # set to empty, they will not be unset.

mysql-test/mysql-test-run.pl

@@ -5264,9 +5264,6 @@ sub mysqld_arguments ($$$) {
   }
 
   my $found_skip_core= 0;
-  my @plugins;
-  my %seen;
-  my $plugin;
   foreach my $arg ( @$extra_opts )
   {
     # Skip --defaults-file option since it's handled above.
@@ -5286,12 +5283,6 @@ sub mysqld_arguments ($$$) {
     {
       ; # Dont add --skip-log-bin when mysqld have --log-slave-updates in config
     }
-    elsif ($plugin = mtr_match_prefix($arg,  "--plugin-load="))
-    {
-      next if $plugin =~ /=$/;
-      push @plugins, $plugin unless $seen{$plugin};
-      $seen{$plugin} = 1;
-    }
     else
     {
       mtr_add_arg($args, "%s", $arg);
@@ -5308,11 +5299,6 @@ sub mysqld_arguments ($$$) {
   mtr_add_arg($args, "--loose-debug-sync-timeout=%s",
               $opt_debug_sync_timeout) unless $opt_user_args;
 
-  if (@plugins) {
-    my $sep = (IS_WINDOWS) ? ';' : ':';
-    mtr_add_arg($args, "--plugin-load=%s" .  join($sep, @plugins));
-  }
-
   return $args;
 }
 

mysql-test/r/mysqld--help.result

@@ -606,6 +606,11 @@ The following options may be given as the first argument:
  plugin is specified as ether a plugin_name=library_file
  pair or only a library_file. If the latter case, all
  plugins from a given library_file will be loaded.
+ --plugin-load-add=name 
+ Optional semicolon-separated list of plugins to load.
+ This option adds to the list speficied by --plugin-load
+ in an incremental way. It can be specified many times,
+ adding more plugins every time.
  --plugin-maturity=name 
  The lowest desirable plugin maturity (unknown,
  experimental, alpha, beta, gamma, or stable). Plugins
@@ -1115,7 +1120,6 @@ performance-schema-max-thread-instances 1000
 performance-schema-setup-actors-size 100
 performance-schema-setup-objects-size 100
 performance-schema-users-size 100
-plugin-load (No default value)
 plugin-maturity unknown
 port 3306
 port-open-timeout 0

mysql-test/r/plugin_load.result

 SELECT @@global.example_enum_var = 'e2';
 @@global.example_enum_var = 'e2'
 1
+select plugin_name, plugin_status from information_schema.plugins
+where plugin_name in ('SIMPLE_PARSER', 'EXAMPLE',
+'DAEMON_EXAMPLE', 'TWO_QUESTIONS', 'THREE_ATTEMPTS');
+plugin_name	plugin_status
+EXAMPLE	ACTIVE
+daemon_example	ACTIVE
+simple_parser	ACTIVE

mysql-test/suite/federated/combinations

 [old]
-plugin-load=$HA_FEDERATED_SO
+plugin-load-add=$HA_FEDERATED_SO
 
 [X]
-plugin-load=$HA_FEDERATEDX_SO
+plugin-load-add=$HA_FEDERATEDX_SO
 

mysql-test/suite/federated/have_federatedx.opt

---plugin-load=$HA_FEDERATEDX_SO --federated
+--plugin-load-add=$HA_FEDERATEDX_SO --federated

mysql-test/suite/funcs_1/t/is_engines_federated.opt

 --loose-federated
---plugin-load=$HA_FEDERATEDX_SO
+--plugin-load-add=$HA_FEDERATEDX_SO

mysql-test/suite/oqgraph/suite.opt

---plugin-load=$HA_OQGRAPH_SO --enable-oqgraph
+--plugin-load-add=$HA_OQGRAPH_SO --enable-oqgraph

mysql-test/suite/plugins/t/feedback_plugin_load.opt

 --loose-feedback
---plugin-load=$FEEDBACK_SO
+--plugin-load-add=$FEEDBACK_SO

mysql-test/suite/sphinx/suite.opt

---plugin-load=$HA_SPHINX_SO --sphinx
+--plugin-load-add=$HA_SPHINX_SO --sphinx

mysql-test/t/plugin_auth_qa_2-master.opt

---plugin-load=$QA_AUTH_INTERFACE_SO
+--plugin-load-add=$QA_AUTH_INTERFACE_SO

mysql-test/t/plugin_auth_qa_3-master.opt

---plugin-load=$QA_AUTH_SERVER_SO
+--plugin-load-add=$QA_AUTH_SERVER_SO

mysql-test/t/plugin_load-master.opt

---plugin-load=EXAMPLE=$HA_EXAMPLE_SO
---loose-plugin-example-enum-var=e2

mysql-test/t/plugin_load.opt

+--plugin-load-add=$DIALOG_EXAMPLES_SO
+--plugin-load=$LIBDAEMON_EXAMPLE_SO
+--plugin-load-add=EXAMPLE=$HA_EXAMPLE_SO
+--plugin-load-add=$MYPLUGLIB_SO
+--plugin-load-add=$HA_EXAMPLE_SO
+--loose-plugin-example-enum-var=e2

mysql-test/t/plugin_load.test

 --source include/not_windows_embedded.inc
 --source include/have_example_plugin.inc
 
+if (!$MYPLUGLIB_SO) {
+  --echo needs SIMPLE_PARSER plugin
+}
+if (!$LIBDAEMON_EXAMPLE_SO) {
+  --echo needs DAEMON_EXAMPLE plugin
+}
+if (!$DIALOG_EXAMPLES_SO) {
+  --echo needs dialog examples plugins
+}
 SELECT @@global.example_enum_var = 'e2';
+
+--sorted_result
+select plugin_name, plugin_status from information_schema.plugins
+  where plugin_name in ('SIMPLE_PARSER', 'EXAMPLE',
+    'DAEMON_EXAMPLE', 'TWO_QUESTIONS', 'THREE_ATTEMPTS');

mysql-test/t/plugin_load_option-master.opt

---plugin-load=EXAMPLE=$HA_EXAMPLE_SO
+--plugin-load-add=EXAMPLE=$HA_EXAMPLE_SO
 --loose-plugin-example=FORCE_PLUS_PERMANENT

sql/mysqld.cc

@@ -1908,6 +1908,7 @@ void clean_up(bool print_message)
   mysql_cond_broadcast(&COND_thread_count);
   mysql_mutex_unlock(&LOCK_thread_count);
 
+  free_list(opt_plugin_load_list_ptr);
   /*
     The following lines may never be executed as the main thread may have
     killed us
@@ -6626,11 +6627,17 @@ struct my_option my_long_options[]=
    &opt_verbose, &opt_verbose, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"version", 'V', "Output version information and exit.", 0, 0, 0, GET_NO_ARG,
    NO_ARG, 0, 0, 0, 0, 0, 0},
-  {"plugin-load", 0,
+  {"plugin-load", OPT_PLUGIN_LOAD,
    "Semicolon-separated list of plugins to load, where each plugin is "
    "specified as ether a plugin_name=library_file pair or only a library_file. "
    "If the latter case, all plugins from a given library_file will be loaded.",
-   &opt_plugin_load, &opt_plugin_load, 0,
+   0, 0, 0,
+   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
+  {"plugin-load-add", OPT_PLUGIN_LOAD_ADD,
+   "Optional semicolon-separated list of plugins to load. This option adds "
+   "to the list speficied by --plugin-load in an incremental way. "
+   "It can be specified many times, adding more plugins every time.",
+   0, 0, 0,
     GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"table_cache", 0, "Deprecated; use --table-open-cache instead.",
    &table_cache_size, &table_cache_size, 0, GET_ULONG,
@@ -7989,6 +7996,13 @@ mysqld_get_one_option(int optid,
       }
     }
     break;
+
+  case OPT_PLUGIN_LOAD:
+    free_list(opt_plugin_load_list_ptr);
+    /* fall through */
+  case OPT_PLUGIN_LOAD_ADD:
+    opt_plugin_load_list_ptr->push_back(new i_string(argument));
+    break;
   case OPT_MAX_LONG_DATA_SIZE:
     max_long_data_size_used= true;
     break;

sql/mysqld.h

@@ -514,6 +514,8 @@ enum options_mysqld
   OPT_LOG_ERROR,
   OPT_LOWER_CASE_TABLE_NAMES,
   OPT_MAX_LONG_DATA_SIZE,
+  OPT_PLUGIN_LOAD,
+  OPT_PLUGIN_LOAD_ADD,
   OPT_ONE_THREAD,
   OPT_PFS_INSTRUMENT,
   OPT_POOL_OF_THREADS,

sql/sql_plugin.cc

@@ -51,8 +51,8 @@ static TYPELIB global_plugin_typelib=
   { array_elements(global_plugin_typelib_names)-1,
     "", global_plugin_typelib_names, NULL };
 
-
-char *opt_plugin_load= NULL;
+static I_List<i_string> opt_plugin_load_list;
+I_List<i_string> *opt_plugin_load_list_ptr= &opt_plugin_load_list;
 char *opt_plugin_dir_ptr;
 char opt_plugin_dir[FN_REFLEN];
 ulong plugin_maturity;
@@ -1040,7 +1040,7 @@ static bool plugin_add(MEM_ROOT *tmp_root,
 {
   struct st_plugin_int tmp;
   struct st_maria_plugin *plugin;
-  uint oks= 0, errs= 0;
+  uint oks= 0, errs= 0, dupes= 0;
   DBUG_ENTER("plugin_add");
   DBUG_PRINT("enter", ("name: %s  dl: %s", name->str, dl->str));
 
@@ -1069,7 +1069,10 @@ static bool plugin_add(MEM_ROOT *tmp_root,
       continue; // plugin name doesn't match
 
     if (!name->str && plugin_find_internal(&tmp.name, MYSQL_ANY_PLUGIN))
+    {
+      dupes++;
       continue; // already installed
+    }
 
     struct st_plugin_int *tmp_plugin_ptr;
     if (*(int*)plugin->info <
@@ -1128,11 +1131,13 @@ static bool plugin_add(MEM_ROOT *tmp_root,
       break;
   }
 
-  if (errs == 0 && oks == 0) // no plugin was found
+  DBUG_ASSERT(!name->str || !dupes); // dupes is ONLY for name->str == 0
+
+  if (errs == 0 && oks == 0 && !dupes) // no plugin was found
     report_error(report, ER_CANT_FIND_DL_ENTRY, name->str);
 
   plugin_dl_del(dl);
-  DBUG_RETURN(errs > 0 || oks == 0);
+  DBUG_RETURN(errs > 0 || oks + dupes == 0);
 }
 
 
@@ -1625,8 +1630,11 @@ int plugin_init(int *argc, char **argv, int flags)
   /* Register all dynamic plugins */
   if (!(flags & PLUGIN_INIT_SKIP_DYNAMIC_LOADING))
   {
-    if (opt_plugin_load)
-      plugin_load_list(&tmp_root, argc, argv, opt_plugin_load);
+    I_List_iterator<i_string> iter(opt_plugin_load_list);
+    i_string *item;
+    while (NULL != (item= iter++))
+      plugin_load_list(&tmp_root, argc, argv, item->ptr);
+
     if (!(flags & PLUGIN_INIT_SKIP_PLUGIN_TABLE))
       plugin_load(&tmp_root, argc, argv);
   }

sql/sql_plugin.h

@@ -40,6 +40,7 @@ enum enum_plugin_load_option { PLUGIN_OFF, PLUGIN_ON, PLUGIN_FORCE,
 extern const char *global_plugin_typelib_names[];
 
 #include <my_sys.h>
+#include "sql_list.h"
 
 #ifdef DBUG_OFF
 #define plugin_ref_to_int(A) A
@@ -137,7 +138,7 @@ typedef struct st_plugin_int **plugin_ref;
 
 typedef int (*plugin_type_init)(struct st_plugin_int *);
 
-extern char *opt_plugin_load;
+extern I_List<i_string> *opt_plugin_load_list_ptr;
 extern char *opt_plugin_dir_ptr;
 extern char opt_plugin_dir[FN_REFLEN];
 extern const LEX_STRING plugin_type_names[];