Fix golint warning on pkg/sysinfo

Signed-off-by: Hu Keping <hukeping@huawei.com>

daemon/daemon_unix.go

@@ -166,12 +166,12 @@ func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *runconfig.HostC
 			return warnings, fmt.Errorf("Invalid value: %v, valid memory swappiness range is 0-100.", swappiness)
 		}
 	}
-	if hostConfig.CPUPeriod > 0 && !daemon.SystemConfig().CpuCfsPeriod {
+	if hostConfig.CPUPeriod > 0 && !daemon.SystemConfig().CPUCfsPeriod {
 		warnings = append(warnings, "Your kernel does not support CPU cfs period. Period discarded.")
 		logrus.Warnf("Your kernel does not support CPU cfs period. Period discarded.")
 		hostConfig.CPUPeriod = 0
 	}
-	if hostConfig.CPUQuota > 0 && !daemon.SystemConfig().CpuCfsQuota {
+	if hostConfig.CPUQuota > 0 && !daemon.SystemConfig().CPUCfsQuota {
 		warnings = append(warnings, "Your kernel does not support CPU cfs quota. Quota discarded.")
 		logrus.Warnf("Your kernel does not support CPU cfs quota. Quota discarded.")
 		hostConfig.CPUQuota = 0

daemon/info.go

@@ -64,7 +64,7 @@ func (daemon *Daemon) SystemInfo() (*types.Info, error) {
 		DriverStatus:       daemon.GraphDriver().Status(),
 		IPv4Forwarding:     !daemon.SystemConfig().IPv4ForwardingDisabled,
 		BridgeNfIptables:   !daemon.SystemConfig().BridgeNfCallIptablesDisabled,
-		BridgeNfIp6tables:  !daemon.SystemConfig().BridgeNfCallIp6tablesDisabled,
+		BridgeNfIp6tables:  !daemon.SystemConfig().BridgeNfCallIP6tablesDisabled,
 		Debug:              os.Getenv("DEBUG") != "",
 		NFd:                fileutils.GetTotalUsedFds(),
 		NGoroutines:        runtime.NumGoroutine(),
@@ -93,8 +93,8 @@ func (daemon *Daemon) SystemInfo() (*types.Info, error) {
 		v.MemoryLimit = daemon.SystemConfig().MemoryLimit
 		v.SwapLimit = daemon.SystemConfig().SwapLimit
 		v.OomKillDisable = daemon.SystemConfig().OomKillDisable
-		v.CpuCfsPeriod = daemon.SystemConfig().CpuCfsPeriod
-		v.CpuCfsQuota = daemon.SystemConfig().CpuCfsQuota
+		v.CpuCfsPeriod = daemon.SystemConfig().CPUCfsPeriod
+		v.CpuCfsQuota = daemon.SystemConfig().CPUCfsQuota
 	}
 
 	if httpProxy := os.Getenv("http_proxy"); httpProxy != "" {

hack/make/validate-lint

@@ -65,6 +65,7 @@ packages=(
 	pkg/streamformatter
 	pkg/stringid
 	pkg/stringutils
+	pkg/sysinfo
 	pkg/systemd
 	pkg/symlink
 	pkg/tailfile

pkg/sysinfo/sysinfo.go

@@ -3,23 +3,43 @@ package sysinfo
 // SysInfo stores information about which features a kernel supports.
 // TODO Windows: Factor out platform specific capabilities.
 type SysInfo struct {
+	// Whether the kernel supports AppArmor or not
 	AppArmor bool
+
 	*cgroupMemInfo
-	*cgroupCpuInfo
-	IPv4ForwardingDisabled        bool
-	BridgeNfCallIptablesDisabled  bool
-	BridgeNfCallIp6tablesDisabled bool
-	CgroupDevicesEnabled          bool
+	*cgroupCPUInfo
+
+	// Whether IPv4 forwarding is supported or not, if this was disabled, networking will not work
+	IPv4ForwardingDisabled bool
+
+	// Whether bridge-nf-call-iptables is supported or not
+	BridgeNfCallIptablesDisabled bool
+
+	// Whether bridge-nf-call-ip6tables is supported or not
+	BridgeNfCallIP6tablesDisabled bool
+
+	// Whether the cgroup has the mountpoint of "devices" or not
+	CgroupDevicesEnabled bool
 }
 
 type cgroupMemInfo struct {
-	MemoryLimit      bool
-	SwapLimit        bool
-	OomKillDisable   bool
+	// Whether memory limit is supported or not
+	MemoryLimit bool
+
+	// Whether swap limit is supported or not
+	SwapLimit bool
+
+	// Whether OOM killer disalbe is supported or not
+	OomKillDisable bool
+
+	// Whether memory swappiness is supported or not
 	MemorySwappiness bool
 }
 
-type cgroupCpuInfo struct {
-	CpuCfsPeriod bool
-	CpuCfsQuota  bool
+type cgroupCPUInfo struct {
+	// Whether CPU CFS(Completely Fair Scheduler) period is supported or not
+	CPUCfsPeriod bool
+
+	// Whether CPU CFS(Completely Fair Scheduler) quota is supported or not
+	CPUCfsQuota bool
 }

pkg/sysinfo/sysinfo_freebsd.go

@@ -1,6 +1,6 @@
 package sysinfo
 
-// TODO FreeBSD
+// New returns an empty SysInfo for freebsd for now.
 func New(quiet bool) *SysInfo {
 	sysInfo := &SysInfo{}
 	return sysInfo

pkg/sysinfo/sysinfo_linux.go

@@ -14,14 +14,14 @@ import (
 func New(quiet bool) *SysInfo {
 	sysInfo := &SysInfo{}
 	sysInfo.cgroupMemInfo = checkCgroupMem(quiet)
-	sysInfo.cgroupCpuInfo = checkCgroupCpu(quiet)
+	sysInfo.cgroupCPUInfo = checkCgroupCPU(quiet)
 
 	_, err := cgroups.FindCgroupMountpoint("devices")
 	sysInfo.CgroupDevicesEnabled = err == nil
 
 	sysInfo.IPv4ForwardingDisabled = !readProcBool("/proc/sys/net/ipv4/ip_forward")
 	sysInfo.BridgeNfCallIptablesDisabled = !readProcBool("/proc/sys/net/bridge/bridge-nf-call-iptables")
-	sysInfo.BridgeNfCallIp6tablesDisabled = !readProcBool("/proc/sys/net/bridge/bridge-nf-call-ip6tables")
+	sysInfo.BridgeNfCallIP6tablesDisabled = !readProcBool("/proc/sys/net/bridge/bridge-nf-call-ip6tables")
 
 	// Check if AppArmor is supported.
 	if _, err := os.Stat("/sys/kernel/security/apparmor"); !os.IsNotExist(err) {
@@ -58,8 +58,8 @@ func checkCgroupMem(quiet bool) *cgroupMemInfo {
 	return info
 }
 
-func checkCgroupCpu(quiet bool) *cgroupCpuInfo {
-	info := &cgroupCpuInfo{}
+func checkCgroupCPU(quiet bool) *cgroupCPUInfo {
+	info := &cgroupCPUInfo{}
 	mountPoint, err := cgroups.FindCgroupMountpoint("cpu")
 	if err != nil {
 		if !quiet {
@@ -68,13 +68,13 @@ func checkCgroupCpu(quiet bool) *cgroupCpuInfo {
 		return info
 	}
 
-	info.CpuCfsPeriod = cgroupEnabled(mountPoint, "cpu.cfs_period_us")
-	if !quiet && !info.CpuCfsPeriod {
+	info.CPUCfsPeriod = cgroupEnabled(mountPoint, "cpu.cfs_period_us")
+	if !quiet && !info.CPUCfsPeriod {
 		logrus.Warn("Your kernel does not support cgroup cfs period")
 	}
 
-	info.CpuCfsQuota = cgroupEnabled(mountPoint, "cpu.cfs_quota_us")
-	if !quiet && !info.CpuCfsQuota {
+	info.CPUCfsQuota = cgroupEnabled(mountPoint, "cpu.cfs_quota_us")
+	if !quiet && !info.CPUCfsQuota {
 		logrus.Warn("Your kernel does not support cgroup cfs quotas")
 	}
 	return info

pkg/sysinfo/sysinfo_windows.go

@@ -1,6 +1,6 @@
 package sysinfo
 
-// TODO Windows
+// New returns an empty SysInfo for windows for now.
 func New(quiet bool) *SysInfo {
 	sysInfo := &SysInfo{}
 	return sysInfo