480 lines
9.4 KiB
C++
480 lines
9.4 KiB
C++
/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include "internal/event.hh"
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#include <algorithm>
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#include <string.h>
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#include <maxscale/atomic.h>
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#include <maxscale/debug.h>
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using namespace std;
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namespace
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{
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using namespace maxscale;
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const char CN_UNKNOWN[] = "Unknown";
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const char CN_FACILITY[] = "facility";
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const char CN_LEVEL[] = "level";
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const char CN_AUTHENTICATION_FAILURE[] = "authentication_failure";
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const char EVENT_PREFIX[] = "event.";
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struct NAME_AND_VALUE
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{
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const char* zName;
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int32_t value;
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};
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int name_and_value_compare(const void* pLeft, const void* pRight)
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{
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const NAME_AND_VALUE* pL = static_cast<const NAME_AND_VALUE*>(pLeft);
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const NAME_AND_VALUE* pR = static_cast<const NAME_AND_VALUE*>(pRight);
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return strcmp(pL->zName, pR->zName);
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}
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// Keep these in alphabetical order.
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const NAME_AND_VALUE levels[] =
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{
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{
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"LOG_ALERT",
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LOG_ALERT,
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},
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{
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"LOG_CRIT",
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LOG_CRIT,
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},
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{
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"LOG_DEBUG",
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LOG_DEBUG,
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},
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{
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"LOG_EMER",
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LOG_EMERG,
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},
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{
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"LOG_ERR",
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LOG_ERR,
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},
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{
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"LOG_INFO",
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LOG_INFO,
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},
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{
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"LOG_NOTICE",
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LOG_NOTICE,
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},
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{
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"LOG_WARNING",
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LOG_WARNING,
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},
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};
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const int N_LEVELS = sizeof(levels) / sizeof(levels[0]);
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// Keep these in alphabetical order.
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const NAME_AND_VALUE facilities[] =
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{
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{
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"LOG_AUTH",
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LOG_AUTH
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},
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{
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"LOG_AUTHPRIV",
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LOG_AUTHPRIV
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},
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{
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"LOG_CRON",
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LOG_CRON
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},
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{
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"LOG_DAEMON",
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LOG_DAEMON
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},
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{
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"LOG_FTP",
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LOG_FTP
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},
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{
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"LOG_KERN",
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LOG_KERN
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},
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{
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"LOG_LOCAL0",
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LOG_LOCAL0
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},
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{
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"LOG_LOCAL1",
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LOG_LOCAL1
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},
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{
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"LOG_LOCAL2",
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LOG_LOCAL2
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},
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{
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"LOG_LOCAL3",
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LOG_LOCAL3
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},
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{
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"LOG_LOCAL4",
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LOG_LOCAL4
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},
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{
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"LOG_LOCAL5",
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LOG_LOCAL5
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},
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{
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"LOG_LOCAL6",
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LOG_LOCAL6
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},
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{
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"LOG_LOCAL7",
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LOG_LOCAL0
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},
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{
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"LOG_LPR",
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LOG_LPR
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},
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{
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"LOG_MAIL",
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LOG_MAIL
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},
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{
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"LOG_NEWS",
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LOG_NEWS
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},
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{
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"LOG_SYSLOG",
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LOG_SYSLOG
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},
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{
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"LOG_USER",
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LOG_USER
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},
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{
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"LOG_UUCP",
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LOG_UUCP
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},
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};
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const int N_FACILITIES = sizeof(facilities) / sizeof(facilities[0]);
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struct EVENT
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{
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const char* zName;
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event::id_t id;
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int32_t facility;
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int32_t level;
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};
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// Keep these in alphabetical order.
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EVENT events[] =
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{
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{
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CN_AUTHENTICATION_FAILURE,
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event::AUTHENTICATION_FAILURE,
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event::DEFAULT_FACILITY,
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event::DEFAULT_LEVEL
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}
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};
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const int N_EVENTS = sizeof(events) / sizeof(events[0]);
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int event_compare(const void* pLeft, const void* pRight)
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{
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const EVENT* pL = static_cast<const EVENT*>(pLeft);
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const EVENT* pR = static_cast<const EVENT*>(pRight);
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return strcmp(pL->zName, pR->zName);
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}
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struct
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{
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EVENT* events;
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const NAME_AND_VALUE* levels;
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const NAME_AND_VALUE* facilities;
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} this_unit =
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{
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events,
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levels,
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facilities
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};
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event::result_t configure_facility(event::id_t id, const char* zValue)
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{
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event::result_t rv = event::INVALID;
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int32_t facility;
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if (log_facility_from_string(&facility, zValue))
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{
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event::set_log_facility(id, facility);
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rv = event::ACCEPTED;
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}
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else
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{
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MXS_ERROR("%s is not a valid facility.", zValue);
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}
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return rv;
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}
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event::result_t configure_level(event::id_t id, const char* zValue)
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{
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event::result_t rv = event::INVALID;
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int32_t level;
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if (log_level_from_string(&level, zValue))
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{
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event::set_log_level(id, level);
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rv = event::ACCEPTED;
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}
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else
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{
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MXS_ERROR("%s is not a valid level.", zValue);
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}
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return rv;
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}
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}
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namespace maxscale
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{
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const char* log_level_to_string(int32_t level)
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{
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auto begin = this_unit.levels;
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auto end = begin + N_LEVELS;
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auto i = find_if(begin, end, [level](const NAME_AND_VALUE& item) -> bool
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{
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return item.value == level;
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});
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return i == end ? CN_UNKNOWN : i->zName;
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}
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bool log_level_from_string(int32_t* pLevel, const char* zValue)
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{
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NAME_AND_VALUE key = { zValue };
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void* pResult = bsearch(&key, this_unit.levels, N_LEVELS, sizeof(NAME_AND_VALUE),
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name_and_value_compare);
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if (pResult)
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{
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const NAME_AND_VALUE* pItem = static_cast<const NAME_AND_VALUE*>(pResult);
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*pLevel = pItem->value;
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}
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return pResult != nullptr;
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}
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const char* log_facility_to_string(int32_t facility)
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{
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auto begin = this_unit.facilities;
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auto end = begin + N_FACILITIES;
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auto i = find_if(begin, end, [facility](const NAME_AND_VALUE& item) -> bool
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{
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return item.value == facility;
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});
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return i == end ? CN_UNKNOWN : i->zName;
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}
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bool log_facility_from_string(int32_t* pFacility, const char* zValue)
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{
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NAME_AND_VALUE key = { zValue };
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void* pResult = bsearch(&key, this_unit.facilities, N_FACILITIES, sizeof(NAME_AND_VALUE),
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name_and_value_compare);
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if (pResult)
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{
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const NAME_AND_VALUE* pItem = static_cast<const NAME_AND_VALUE*>(pResult);
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*pFacility = pItem->value;
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}
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return pResult != nullptr;
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}
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namespace event
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{
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const char* to_string(id_t id)
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{
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auto begin = this_unit.events;
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auto end = begin + N_EVENTS;
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auto i = find_if(begin, end, [id](const EVENT& item) -> bool
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{
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return item.id == id;
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});
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return i == end ? CN_UNKNOWN : i->zName;
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}
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bool from_string(id_t* pId, const char* zValue)
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{
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EVENT key = { zValue };
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void* pResult = bsearch(&key, this_unit.events, N_EVENTS, sizeof(EVENT),
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event_compare);
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if (pResult)
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{
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const EVENT* pItem = static_cast<const EVENT*>(pResult);
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*pId = pItem->id;
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}
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return pResult != nullptr;
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}
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void set_log_facility(id_t id, int32_t facility)
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{
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bool rv = false;
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ss_dassert((id >= 0) && (id < N_EVENTS));
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// We silently strip away other than the relevant bits.
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facility = facility & LOG_FACMASK;
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EVENT& event = this_unit.events[id];
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atomic_store_int32(&event.facility, facility);
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}
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int32_t get_log_facility(id_t id)
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{
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ss_dassert((id >= 0) && (id < N_EVENTS));
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const EVENT& event = this_unit.events[id];
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return atomic_load_int32(&event.facility);
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}
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void set_log_level(id_t id, int32_t level)
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{
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ss_dassert((id >= 0) && (id < N_EVENTS));
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// We silently strip away other than the relevant bits.
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level = level & LOG_PRIMASK;
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EVENT& event = this_unit.events[id];
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atomic_store_int32(&event.level, level);
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}
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int32_t get_log_level(id_t id)
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{
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ss_dassert((id >= 0) && (id < N_EVENTS));
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const EVENT& event = this_unit.events[id];
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return atomic_load_int32(&event.level);
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}
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result_t configure(const char* zName, const char* zValue)
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{
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result_t rv = IGNORED;
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if (strncmp(zName, EVENT_PREFIX, sizeof(EVENT_PREFIX) - 1) == 0)
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{
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rv = INVALID;
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string name(zName + sizeof(EVENT_PREFIX) - 1); // Character following '.'
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auto i = name.find_first_of('.');
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if (i != string::npos)
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{
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string event = name.substr(0, i);
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string property = name.substr(i + 1);
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id_t id;
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if (from_string(&id, event.c_str()))
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{
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ss_dassert((id >= 0) && (id < N_EVENTS));
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if (property == CN_FACILITY)
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{
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rv = configure_facility(id, zValue);
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}
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else if (property == CN_LEVEL)
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{
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rv = configure_level(id, zValue);
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}
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else
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{
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MXS_ERROR("%s is neither %s nor %s.", property.c_str(), CN_FACILITY, CN_LEVEL);
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}
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}
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else
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{
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MXS_ERROR("%s does not refer to a known event.", zValue);
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}
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}
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else
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{
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MXS_ERROR("%s is not a valid event configuration.", zName);
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}
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}
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return rv;
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}
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void log(id_t event_id,
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const char* modname,
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const char* file, int line, const char* function,
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const char* format, ...)
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{
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va_list valist;
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ss_dassert((event_id >= 0) && (event_id < N_EVENTS));
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const EVENT& event = this_unit.events[event_id];
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int priority = atomic_load_int32(&event.facility) | atomic_load_int32(&event.level);
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va_start(valist, format);
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int len = vsnprintf(NULL, 0, format, valist);
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va_end(valist);
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if (len > BUFSIZ)
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{
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len = BUFSIZ;
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}
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char message[len + 1];
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va_start(valist, format);
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vsnprintf(message, len + 1, format, valist);
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va_end(valist);
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mxs_log_message(priority, modname, file, line, function, "%s", message);
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}
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} // event
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} // maxscale
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