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Merge pull request #2289 from tanguyfalconnet/ethtool-lock

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ethtool_linux: add mutex around entries access
This commit is contained in:
Ben Kochie 2022-03-22 04:34:19 -07:00 committed by GitHub
commit 9aae303a46
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 30 additions and 15 deletions
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45
collector/ethtool_linux.go
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@ -27,6 +27,7 @@ import (
"regexp"
"sort"
"strings"
"sync"
"syscall"
"github.com/go-kit/log"
@ -73,6 +74,7 @@ func (e *ethtoolLibrary) LinkInfo(intf string) (ethtool.EthtoolCmd, error) {
type ethtoolCollector struct {
fs sysfs.FS
entries map[string]*prometheus.Desc
entriesMutex sync.Mutex
ethtool Ethtool
deviceFilter netDevFilter
infoDesc *prometheus.Desc
@ -233,9 +235,9 @@ func (c *ethtoolCollector) updatePortCapabilities(ch chan<- prometheus.Metric, p
if linkModes&(1<<unix.ETHTOOL_LINK_MODE_Asym_Pause_BIT) != 0 {
asymmetricPause = 1.0
}
ch <- prometheus.MustNewConstMetric(c.entries[fmt.Sprintf("%s_autonegotiate", prefix)], prometheus.GaugeValue, autonegotiate, device)
ch <- prometheus.MustNewConstMetric(c.entries[fmt.Sprintf("%s_pause", prefix)], prometheus.GaugeValue, pause, device)
ch <- prometheus.MustNewConstMetric(c.entries[fmt.Sprintf("%s_asymmetricpause", prefix)], prometheus.GaugeValue, asymmetricPause, device)
ch <- prometheus.MustNewConstMetric(c.entry(fmt.Sprintf("%s_autonegotiate", prefix)), prometheus.GaugeValue, autonegotiate, device)
ch <- prometheus.MustNewConstMetric(c.entry(fmt.Sprintf("%s_pause", prefix)), prometheus.GaugeValue, pause, device)
ch <- prometheus.MustNewConstMetric(c.entry(fmt.Sprintf("%s_asymmetricpause", prefix)), prometheus.GaugeValue, asymmetricPause, device)
}
// updatePortInfo generates port type metrics to indicate if the network devices supports Twisted Pair, optical fiber, etc.
@ -251,7 +253,7 @@ func (c *ethtoolCollector) updatePortInfo(ch chan<- prometheus.Metric, device st
"Backplane": unix.ETHTOOL_LINK_MODE_Backplane_BIT,
} {
if linkModes&(1<<bit) != 0 {
ch <- prometheus.MustNewConstMetric(c.entries["supported_port"], prometheus.GaugeValue, 1.0, device, name)
ch <- prometheus.MustNewConstMetric(c.entry("supported_port"), prometheus.GaugeValue, 1.0, device, name)
}
}
@ -299,7 +301,7 @@ func (c *ethtoolCollector) updateSpeeds(ch chan<- prometheus.Metric, prefix stri
unix.ETHTOOL_LINK_MODE_25000baseCR_Full_BIT: {25000, full, "CR"},
} {
if linkModes&(1<<bit) != 0 {
ch <- prometheus.MustNewConstMetric(c.entries[linkMode], prometheus.GaugeValue,
ch <- prometheus.MustNewConstMetric(c.entry(linkMode), prometheus.GaugeValue,
float64(labels.speed)*Mbps, device, labels.duplex, fmt.Sprintf("%dbase%s", labels.speed, labels.phy))
}
}
@ -334,7 +336,7 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
c.updatePortCapabilities(ch, "supported", device, linkInfo.Supported)
c.updateSpeeds(ch, "advertised", device, linkInfo.Advertising)
c.updatePortCapabilities(ch, "advertised", device, linkInfo.Advertising)
ch <- prometheus.MustNewConstMetric(c.entries["autonegotiate"], prometheus.GaugeValue, float64(linkInfo.Autoneg), device)
ch <- prometheus.MustNewConstMetric(c.entry("autonegotiate"), prometheus.GaugeValue, float64(linkInfo.Autoneg), device)
} else {
if errno, ok := err.(syscall.Errno); ok {
if err == unix.EOPNOTSUPP {
@ -420,15 +422,7 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
val := stats[metric]
// Check to see if this metric exists; if not then create it and store it in c.entries.
entry, exists := c.entries[metric]
if !exists {
entry = prometheus.NewDesc(
metricFQName,
fmt.Sprintf("Network interface %s", metric),
[]string{"device"}, nil,
)
c.entries[metric] = entry
}
entry := c.entryWithCreate(metric, metricFQName)
ch <- prometheus.MustNewConstMetric(
entry, prometheus.UntypedValue, float64(val), device)
}
@ -436,3 +430,24 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
return nil
}
func (c *ethtoolCollector) entryWithCreate(key, metricFQName string) *prometheus.Desc {
c.entriesMutex.Lock()
defer c.entriesMutex.Unlock()
if _, ok := c.entries[key]; !ok {
c.entries[key] = prometheus.NewDesc(
metricFQName,
fmt.Sprintf("Network interface %s", key),
[]string{"device"}, nil,
)
}
return c.entries[key]
}
func (c *ethtoolCollector) entry(key string) *prometheus.Desc {
c.entriesMutex.Lock()
defer c.entriesMutex.Unlock()
return c.entries[key]
}