root / src / Ganeti / Storage / Diskstats / Parser.hs @ de36f091
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1 | c6bca2d1 | Michele Tartara | {-# LANGUAGE OverloadedStrings #-} |
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2 | c6bca2d1 | Michele Tartara | {-| Diskstats proc file parser |
3 | c6bca2d1 | Michele Tartara | |
4 | c6bca2d1 | Michele Tartara | This module holds the definition of the parser that extracts status |
5 | c6bca2d1 | Michele Tartara | information about the disks of the system from the @/proc/diskstats@ file. |
6 | c6bca2d1 | Michele Tartara | |
7 | c6bca2d1 | Michele Tartara | -} |
8 | c6bca2d1 | Michele Tartara | {- |
9 | c6bca2d1 | Michele Tartara | |
10 | c6bca2d1 | Michele Tartara | Copyright (C) 2013 Google Inc. |
11 | c6bca2d1 | Michele Tartara | |
12 | c6bca2d1 | Michele Tartara | This program is free software; you can redistribute it and/or modify |
13 | c6bca2d1 | Michele Tartara | it under the terms of the GNU General Public License as published by |
14 | c6bca2d1 | Michele Tartara | the Free Software Foundation; either version 2 of the License, or |
15 | c6bca2d1 | Michele Tartara | (at your option) any later version. |
16 | c6bca2d1 | Michele Tartara | |
17 | c6bca2d1 | Michele Tartara | This program is distributed in the hope that it will be useful, but |
18 | c6bca2d1 | Michele Tartara | WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | c6bca2d1 | Michele Tartara | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
20 | c6bca2d1 | Michele Tartara | General Public License for more details. |
21 | c6bca2d1 | Michele Tartara | |
22 | c6bca2d1 | Michele Tartara | You should have received a copy of the GNU General Public License |
23 | c6bca2d1 | Michele Tartara | along with this program; if not, write to the Free Software |
24 | c6bca2d1 | Michele Tartara | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
25 | c6bca2d1 | Michele Tartara | 02110-1301, USA. |
26 | c6bca2d1 | Michele Tartara | |
27 | c6bca2d1 | Michele Tartara | -} |
28 | c5f6cba2 | Helga Velroyen | module Ganeti.Storage.Diskstats.Parser (diskstatsParser) where |
29 | c6bca2d1 | Michele Tartara | |
30 | 090e5de8 | Spyros Trigazis | import Control.Applicative ((<*>), (<*), (<$>)) |
31 | c6bca2d1 | Michele Tartara | import qualified Data.Attoparsec.Text as A |
32 | c6bca2d1 | Michele Tartara | import qualified Data.Attoparsec.Combinator as AC |
33 | c6bca2d1 | Michele Tartara | import Data.Attoparsec.Text (Parser) |
34 | c6bca2d1 | Michele Tartara | |
35 | 090e5de8 | Spyros Trigazis | import Ganeti.Parsers |
36 | c5f6cba2 | Helga Velroyen | import Ganeti.Storage.Diskstats.Types |
37 | c6bca2d1 | Michele Tartara | |
38 | c6bca2d1 | Michele Tartara | -- * Parser implementation |
39 | c6bca2d1 | Michele Tartara | |
40 | c6bca2d1 | Michele Tartara | -- | The parser for one line of the diskstatus file. |
41 | c6bca2d1 | Michele Tartara | oneDiskstatsParser :: Parser Diskstats |
42 | c6bca2d1 | Michele Tartara | oneDiskstatsParser = |
43 | 090e5de8 | Spyros Trigazis | let majorP = numberP |
44 | 090e5de8 | Spyros Trigazis | minorP = numberP |
45 | 090e5de8 | Spyros Trigazis | nameP = stringP |
46 | 090e5de8 | Spyros Trigazis | readsNumP = numberP |
47 | 090e5de8 | Spyros Trigazis | mergedReadsP = numberP |
48 | 090e5de8 | Spyros Trigazis | secReadP = numberP |
49 | 090e5de8 | Spyros Trigazis | timeReadP = numberP |
50 | 090e5de8 | Spyros Trigazis | writesP = numberP |
51 | 090e5de8 | Spyros Trigazis | mergedWritesP = numberP |
52 | 090e5de8 | Spyros Trigazis | secWrittenP = numberP |
53 | 090e5de8 | Spyros Trigazis | timeWriteP = numberP |
54 | 090e5de8 | Spyros Trigazis | iosP = numberP |
55 | 090e5de8 | Spyros Trigazis | timeIOP = numberP |
56 | 090e5de8 | Spyros Trigazis | wIOmillisP = numberP |
57 | 090e5de8 | Spyros Trigazis | in |
58 | 090e5de8 | Spyros Trigazis | Diskstats <$> majorP <*> minorP <*> nameP <*> readsNumP <*> mergedReadsP |
59 | 090e5de8 | Spyros Trigazis | <*> secReadP <*> timeReadP <*> writesP <*> mergedWritesP <*> secWrittenP |
60 | 090e5de8 | Spyros Trigazis | <*> timeWriteP <*> iosP <*> timeIOP <*> wIOmillisP <* A.endOfLine |
61 | c6bca2d1 | Michele Tartara | |
62 | c6bca2d1 | Michele Tartara | -- | The parser for a whole diskstatus file. |
63 | c6bca2d1 | Michele Tartara | diskstatsParser :: Parser [Diskstats] |
64 | c6bca2d1 | Michele Tartara | diskstatsParser = oneDiskstatsParser `AC.manyTill` A.endOfInput |