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- /* Copyright (c) 2011, 2021, Oracle and/or its affiliates.
-
- 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,
- 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
-
- #include "my_global.h"
- #include "my_thread.h"
- #include "table_hosts.h"
- #include "pfs_instr_class.h"
- #include "pfs_instr.h"
- #include "pfs_account.h"
- #include "pfs_host.h"
- #include "pfs_visitor.h"
- #include "pfs_memory.h"
- #include "pfs_status.h"
- #include "field.h"
-
- THR_LOCK table_hosts::m_table_lock;
-
- static const TABLE_FIELD_TYPE field_types[]=
- {
- {
- { C_STRING_WITH_LEN("HOST") },
- { C_STRING_WITH_LEN("char(60)") },
- { NULL, 0}
- },
- {
- { C_STRING_WITH_LEN("CURRENT_CONNECTIONS") },
- { C_STRING_WITH_LEN("bigint(20)") },
- { NULL, 0}
- },
- {
- { C_STRING_WITH_LEN("TOTAL_CONNECTIONS") },
- { C_STRING_WITH_LEN("bigint(20)") },
- { NULL, 0}
- }
- };
-
- TABLE_FIELD_DEF
- table_hosts::m_field_def=
- { 3, field_types };
-
- PFS_engine_table_share
- table_hosts::m_share=
- {
- { C_STRING_WITH_LEN("hosts") },
- &pfs_truncatable_acl,
- table_hosts::create,
- NULL, /* write_row */
- table_hosts::delete_all_rows,
- cursor_by_host::get_row_count,
- sizeof(PFS_simple_index), /* ref length */
- &m_table_lock,
- &m_field_def,
- false, /* checked */
- false /* perpetual */
- };
-
- PFS_engine_table* table_hosts::create()
- {
- return new table_hosts();
- }
-
- int
- table_hosts::delete_all_rows(void)
- {
- reset_events_waits_by_thread();
- reset_events_waits_by_account();
- reset_events_waits_by_host();
- reset_events_stages_by_thread();
- reset_events_stages_by_account();
- reset_events_stages_by_host();
- reset_events_statements_by_thread();
- reset_events_statements_by_account();
- reset_events_statements_by_host();
- reset_events_transactions_by_thread();
- reset_events_transactions_by_account();
- reset_events_transactions_by_host();
- reset_memory_by_thread();
- reset_memory_by_account();
- reset_memory_by_host();
- reset_status_by_thread();
- reset_status_by_account();
- reset_status_by_host();
- purge_all_account();
- purge_all_host();
- return 0;
- }
-
- table_hosts::table_hosts()
- : cursor_by_host(& m_share),
- m_row_exists(false)
- {}
-
- void table_hosts::make_row(PFS_host *pfs)
- {
- pfs_optimistic_state lock;
-
- m_row_exists= false;
- pfs->m_lock.begin_optimistic_lock(&lock);
-
- if (m_row.m_host.make_row(pfs))
- return;
-
- PFS_connection_stat_visitor visitor;
- PFS_connection_iterator::visit_host(pfs,
- true, /* accounts */
- true, /* threads */
- false, /* THDs */
- & visitor);
-
- if (! pfs->m_lock.end_optimistic_lock(& lock))
- return;
-
- m_row.m_connection_stat.set(& visitor.m_stat);
- m_row_exists= true;
- }
-
- int table_hosts::read_row_values(TABLE *table,
- unsigned char *buf,
- Field **fields,
- bool read_all)
- {
- Field *f;
-
- if (unlikely(! m_row_exists))
- return HA_ERR_RECORD_DELETED;
-
- /* Set the null bits */
- assert(table->s->null_bytes == 1);
- buf[0]= 0;
-
- for (; (f= *fields) ; fields++)
- {
- if (read_all || bitmap_is_set(table->read_set, f->field_index))
- {
- switch(f->field_index)
- {
- case 0: /* HOST */
- m_row.m_host.set_field(f);
- break;
- case 1: /* CURRENT_CONNECTIONS */
- case 2: /* TOTAL_CONNECTIONS */
- m_row.m_connection_stat.set_field(f->field_index - 1, f);
- break;
- default:
- assert(false);
- }
- }
- }
- return 0;
- }
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