| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | //go:build linux || netbsd |
| 4 | |
| 5 | package lvm |
| 6 | |
| 7 | import ( |
| 8 | "encoding/json" |
| 9 | "fmt" |
| 10 | "strconv" |
| 11 | ) |
| 12 | |
| 13 | type lvsReport struct { |
| 14 | Report []struct { |
| 15 | Lv []struct { |
| 16 | VGName string `json:"vg_name"` |
| 17 | LVName string `json:"lv_name"` |
| 18 | LVSize string `json:"lv_size"` |
| 19 | DataPercent string `json:"data_percent"` |
| 20 | MetadataPercent string `json:"metadata_percent"` |
| 21 | LVAttr string `json:"lv_attr"` |
| 22 | } `json:"lv"` |
| 23 | } `json:"report"` |
| 24 | } |
| 25 | |
| 26 | func (c *Collector) collect() (map[string]int64, error) { |
| 27 | bs, err := c.exec.lvsReportJson() |
| 28 | if err != nil { |
| 29 | return nil, err |
| 30 | } |
| 31 | |
| 32 | var report lvsReport |
| 33 | if err = json.Unmarshal(bs, &report); err != nil { |
| 34 | return nil, err |
| 35 | } |
| 36 | |
| 37 | mx := make(map[string]int64) |
| 38 | |
| 39 | for _, r := range report.Report { |
| 40 | for _, lv := range r.Lv { |
| 41 | if lv.VGName == "" || lv.LVName == "" { |
| 42 | continue |
| 43 | } |
| 44 | |
| 45 | if !isThinPool(lv.LVAttr) { |
| 46 | c.Debugf("skipping lv '%s' vg '%s': not a thin pool", lv.LVName, lv.VGName) |
| 47 | continue |
| 48 | } |
| 49 | |
| 50 | key := fmt.Sprintf("lv_%s_vg_%s", lv.LVName, lv.VGName) |
| 51 | if !c.lvmThinPools[key] { |
| 52 | c.addLVMThinPoolCharts(lv.LVName, lv.VGName) |
| 53 | c.lvmThinPools[key] = true |
| 54 | } |
| 55 | if v, ok := parseFloat(lv.DataPercent); ok { |
| 56 | mx[key+"_data_percent"] = int64(v * 100) |
| 57 | } |
| 58 | if v, ok := parseFloat(lv.MetadataPercent); ok { |
| 59 | mx[key+"_metadata_percent"] = int64(v * 100) |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | return mx, nil |
| 65 | } |
| 66 | |
| 67 | func isThinPool(lvAttr string) bool { |
| 68 | return getLVType(lvAttr) == "thin_pool" |
| 69 | } |
| 70 | |
| 71 | func getLVType(lvAttr string) string { |
| 72 | if len(lvAttr) == 0 { |
| 73 | return "" |
| 74 | } |
| 75 | |
| 76 | // https://man7.org/linux/man-pages/man8/lvs.8.html#NOTES |
| 77 | switch lvAttr[0] { |
| 78 | case 'C': |
| 79 | return "cache" |
| 80 | case 'm': |
| 81 | return "mirrored" |
| 82 | case 'M': |
| 83 | return "mirrored_without_initial_sync" |
| 84 | case 'o': |
| 85 | return "origin" |
| 86 | case 'O': |
| 87 | return "origin_with_merging_snapshot" |
| 88 | case 'g': |
| 89 | return "integrity" |
| 90 | case 'r': |
| 91 | return "raid" |
| 92 | case 'R': |
| 93 | return "raid_without_initial_sync" |
| 94 | case 's': |
| 95 | return "snapshot" |
| 96 | case 'S': |
| 97 | return "merging_snapshot" |
| 98 | case 'p': |
| 99 | return "pvmove" |
| 100 | case 'v': |
| 101 | return "virtual" |
| 102 | case 'i': |
| 103 | return "mirror_or_raid_image" |
| 104 | case 'I': |
| 105 | return "mirror_or_raid_mage_out_of_sync" |
| 106 | case 'l': |
| 107 | return "log_device" |
| 108 | case 'c': |
| 109 | return "under_conversion" |
| 110 | case 'V': |
| 111 | return "thin_volume" |
| 112 | case 't': |
| 113 | return "thin_pool" |
| 114 | case 'T': |
| 115 | return "thin_pool_data" |
| 116 | case 'd': |
| 117 | return "vdo_pool" |
| 118 | case 'D': |
| 119 | return "vdo_pool_data" |
| 120 | case 'e': |
| 121 | return "raid_or_pool_metadata" |
| 122 | default: |
| 123 | return "" |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | func parseFloat(s string) (float64, bool) { |
| 128 | if s == "-" { |
| 129 | return 0, false |
| 130 | } |
| 131 | v, err := strconv.ParseFloat(s, 64) |
| 132 | return v, err == nil |
| 133 | } |