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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <cstdint>
#include <string>
#include <vector>
#include "mongo/base/status.h"
#include "mongo/base/string_data.h"
namespace mongo {
class BSONObjBuilder;
namespace procparser {
/**
* Reads a string matching /proc/stat format, and writes the values of the specified keys into
* builder. If fields are not in the "data" parameter, they are omitted. Converts fields
* from USER_HZ to milliseconds, and names fields with a "_ms" suffix. If the string is empty,
* corrupt, or missing fields, the builder will simply be missing fields.
*
* keys - sorted vector of field names to include in the output, "cpu" will include the 11 fields
* that make up cpu. If keys is empty, all keys are outputed.
* data - string to parsee
* ticksPerSecond - USER_HZ value
* builder - BSON output
*/
Status parseProcStat(const std::vector<StringData>& keys,
StringData data,
int64_t ticksPerSecond,
BSONObjBuilder* builder);
/**
* Read from file, and write the specified list of keys into builder.
*
* See parseProcStat.
*
* Returns Status errors on file reading issues.
*/
Status parseProcStatFile(StringData filename,
const std::vector<StringData>& keys,
BSONObjBuilder* builder);
/**
* Read a string matching /proc/meminfo format, and write the specified list of keys in builder.
*
* keys - list of keys to output in BSON. If keys is empty, all keys are outputed.
* data - string to parsee
* builder - BSON output
*/
Status parseProcMemInfo(const std::vector<StringData>& keys,
StringData data,
BSONObjBuilder* builder);
/**
* Read from file, and write the specified list of keys in builder.
*/
Status parseProcMemInfoFile(StringData filename,
const std::vector<StringData>& keys,
BSONObjBuilder* builder);
/**
* Read a string matching /proc/net/netstat format, and write the keys
* found in that string into builder.
*
* data - string to parse
* builder - BSON output
*/
Status parseProcNetstat(const std::vector<StringData>& keys,
StringData data,
BSONObjBuilder* builder);
/**
* Read from file, and write the keys found in that file into builder.
*/
Status parseProcNetstatFile(const std::vector<StringData>& keys,
StringData filename,
BSONObjBuilder* builder);
/**
* Read a string matching /proc/diskstats format, and write the specified list of disks in builder.
*
* disks - vector of block devices to include in output. For each disk selected, 11 fields are
* output in a nested document. There is no error if the disk is not found in the data. Also
* a disk is excluded if it has no activity since startup (i.e. an idle CD-ROM drive). If
* disks is empty, all non-zero block devices are outputed (this will include partitions,
* etc).
* data - string to parsee
* builder - BSON output
*/
Status parseProcDiskStats(const std::vector<StringData>& disks,
StringData data,
BSONObjBuilder* builder);
/**
* Read from file, and write the specified list of disks in builder.
*/
Status parseProcDiskStatsFile(StringData filename,
const std::vector<StringData>& disks,
BSONObjBuilder* builder);
/**
* Get a vector of disks to monitor by enumerating the specified directory.
*
* If the directory does not exist, or otherwise permission is denied, returns an empty vector.
*/
std::vector<std::string> findPhysicalDisks(StringData directory);
} // namespace procparser
} // namespace mongo
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