Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 339 insertions, 0 deletions

diff --git a/storage/perfschema/pfs_user.cc b/storage/perfschema/pfs_user.cc
new file mode 100644
index 00000000..feb99f41
--- /dev/null
+++ b/storage/perfschema/pfs_user.cc
@@ -0,0 +1,339 @@
+/* Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is also distributed with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have included with MySQL.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License, version 2.0, for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335  USA */
+
+/**
+  @file storage/perfschema/pfs_user.cc
+  Performance schema user (implementation).
+*/
+
+#include "my_global.h"
+#include "my_sys.h"
+#include "pfs.h"
+#include "pfs_stat.h"
+#include "pfs_instr.h"
+#include "pfs_setup_actor.h"
+#include "pfs_user.h"
+#include "pfs_global.h"
+#include "pfs_instr_class.h"
+#include "pfs_buffer_container.h"
+
+/**
+  @addtogroup Performance_schema_buffers
+  @{
+*/
+
+LF_HASH user_hash;
+static bool user_hash_inited= false;
+
+/**
+  Initialize the user buffers.
+  @param param                        sizing parameters
+  @return 0 on success
+*/
+int init_user(const PFS_global_param *param)
+{
+  if (global_user_container.init(param->m_user_sizing))
+    return 1;
+
+  return 0;
+}
+
+/** Cleanup all the user buffers. */
+void cleanup_user(void)
+{
+  global_user_container.cleanup();
+}
+
+C_MODE_START
+static uchar *user_hash_get_key(const uchar *entry, size_t *length,
+                                my_bool)
+{
+  const PFS_user * const *typed_entry;
+  const PFS_user *user;
+  const void *result;
+  typed_entry= reinterpret_cast<const PFS_user* const *> (entry);
+  DBUG_ASSERT(typed_entry != NULL);
+  user= *typed_entry;
+  DBUG_ASSERT(user != NULL);
+  *length= user->m_key.m_key_length;
+  result= user->m_key.m_hash_key;
+  return const_cast<uchar*> (reinterpret_cast<const uchar*> (result));
+}
+C_MODE_END
+
+/**
+  Initialize the user hash.
+  @return 0 on success
+*/
+int init_user_hash(const PFS_global_param *param)
+{
+  if ((! user_hash_inited) && (param->m_user_sizing != 0))
+  {
+    lf_hash_init(&user_hash, sizeof(PFS_user*), LF_HASH_UNIQUE,
+                 0, 0, user_hash_get_key, &my_charset_bin);
+    user_hash_inited= true;
+  }
+  return 0;
+}
+
+/** Cleanup the user hash. */
+void cleanup_user_hash(void)
+{
+  if (user_hash_inited)
+  {
+    lf_hash_destroy(&user_hash);
+    user_hash_inited= false;
+  }
+}
+
+static LF_PINS* get_user_hash_pins(PFS_thread *thread)
+{
+  if (unlikely(thread->m_user_hash_pins == NULL))
+  {
+    if (! user_hash_inited)
+      return NULL;
+    thread->m_user_hash_pins= lf_hash_get_pins(&user_hash);
+  }
+  return thread->m_user_hash_pins;
+}
+
+static void set_user_key(PFS_user_key *key,
+                         const char *user, uint user_length)
+{
+  DBUG_ASSERT(user_length <= USERNAME_LENGTH);
+
+  char *ptr= &key->m_hash_key[0];
+  if (user_length > 0)
+  {
+    memcpy(ptr, user, user_length);
+    ptr+= user_length;
+  }
+  ptr[0]= 0;
+  ptr++;
+  key->m_key_length= (uint)(ptr - &key->m_hash_key[0]);
+}
+
+PFS_user *
+find_or_create_user(PFS_thread *thread,
+                    const char *username, uint username_length)
+{
+  LF_PINS *pins= get_user_hash_pins(thread);
+  if (unlikely(pins == NULL))
+  {
+    global_user_container.m_lost++;
+    return NULL;
+  }
+
+  PFS_user_key key;
+  set_user_key(&key, username, username_length);
+
+  PFS_user **entry;
+  PFS_user *pfs;
+  uint retry_count= 0;
+  const uint retry_max= 3;
+  pfs_dirty_state dirty_state;
+
+search:
+  entry= reinterpret_cast<PFS_user**>
+    (lf_hash_search(&user_hash, pins,
+                    key.m_hash_key, key.m_key_length));
+  if (entry && (entry != MY_ERRPTR))
+  {
+    pfs= *entry;
+    pfs->inc_refcount();
+    lf_hash_search_unpin(pins);
+    return pfs;
+  }
+
+  lf_hash_search_unpin(pins);
+
+  pfs= global_user_container.allocate(& dirty_state);
+  if (pfs != NULL)
+  {
+    pfs->m_key= key;
+    if (username_length > 0)
+      pfs->m_username= &pfs->m_key.m_hash_key[0];
+    else
+      pfs->m_username= NULL;
+    pfs->m_username_length= username_length;
+
+    pfs->init_refcount();
+    pfs->reset_stats();
+    pfs->m_disconnected_count= 0;
+
+    int res;
+    pfs->m_lock.dirty_to_allocated(& dirty_state);
+    res= lf_hash_insert(&user_hash, pins, &pfs);
+    if (likely(res == 0))
+    {
+      return pfs;
+    }
+
+    global_user_container.deallocate(pfs);
+
+    if (res > 0)
+    {
+      if (++retry_count > retry_max)
+      {
+        global_user_container.m_lost++;
+        return NULL;
+      }
+      goto search;
+    }
+
+    global_user_container.m_lost++;
+    return NULL;
+  }
+
+  return NULL;
+}
+
+void PFS_user::aggregate(bool alive)
+{
+  aggregate_waits();
+  aggregate_stages();
+  aggregate_statements();
+  aggregate_transactions();
+  aggregate_memory(alive);
+  aggregate_status();
+  aggregate_stats();
+}
+
+void PFS_user::aggregate_waits()
+{
+  /* No parent to aggregate to, clean the stats */
+  reset_waits_stats();
+}
+
+void PFS_user::aggregate_stages()
+{
+  /* No parent to aggregate to, clean the stats */
+  reset_stages_stats();
+}
+
+void PFS_user::aggregate_statements()
+{
+  /* No parent to aggregate to, clean the stats */
+  reset_statements_stats();
+}
+
+void PFS_user::aggregate_transactions()
+{
+  /* No parent to aggregate to, clean the stats */
+  reset_transactions_stats();
+}
+
+void PFS_user::aggregate_memory(bool alive)
+{
+  /* No parent to aggregate to, clean the stats */
+  rebase_memory_stats();
+}
+
+void PFS_user::aggregate_status()
+{
+  /* No parent to aggregate to, clean the stats */
+  reset_status_stats();
+}
+
+void PFS_user::aggregate_stats()
+{
+  /* No parent to aggregate to, clean the stats */
+  m_disconnected_count= 0;
+}
+
+void PFS_user::release()
+{
+  dec_refcount();
+}
+
+void PFS_user::carry_memory_stat_delta(PFS_memory_stat_delta *delta, uint index)
+{
+  PFS_memory_stat *event_name_array;
+  PFS_memory_stat *stat;
+  PFS_memory_stat_delta delta_buffer;
+
+  event_name_array= write_instr_class_memory_stats();
+  stat= & event_name_array[index];
+  (void) stat->apply_delta(delta, &delta_buffer);
+}
+
+PFS_user *sanitize_user(PFS_user *unsafe)
+{
+  return global_user_container.sanitize(unsafe);
+}
+
+void purge_user(PFS_thread *thread, PFS_user *user)
+{
+  LF_PINS *pins= get_user_hash_pins(thread);
+  if (unlikely(pins == NULL))
+    return;
+
+  PFS_user **entry;
+  entry= reinterpret_cast<PFS_user**>
+    (lf_hash_search(&user_hash, pins,
+                    user->m_key.m_hash_key, user->m_key.m_key_length));
+  if (entry && (entry != MY_ERRPTR))
+  {
+    DBUG_ASSERT(*entry == user);
+    if (user->get_refcount() == 0)
+    {
+      lf_hash_delete(&user_hash, pins,
+                     user->m_key.m_hash_key, user->m_key.m_key_length);
+      user->aggregate(false);
+      global_user_container.deallocate(user);
+    }
+  }
+
+  lf_hash_search_unpin(pins);
+}
+
+class Proc_purge_user
+  : public PFS_buffer_processor<PFS_user>
+{
+public:
+  Proc_purge_user(PFS_thread *thread)
+    : m_thread(thread)
+  {}
+
+  virtual void operator()(PFS_user *pfs)
+  {
+    pfs->aggregate(true);
+    if (pfs->get_refcount() == 0)
+      purge_user(m_thread, pfs);
+  }
+
+private:
+  PFS_thread *m_thread;
+};
+
+/** Purge non connected users, reset stats of connected users. */
+void purge_all_user(void)
+{
+  PFS_thread *thread= PFS_thread::get_current_thread();
+  if (unlikely(thread == NULL))
+    return;
+
+  Proc_purge_user proc(thread);
+  global_user_container.apply(proc);
+}
+
+/** @} */