144 lines
3.7 KiB
Go
144 lines
3.7 KiB
Go
package sysinfo // import "github.com/docker/docker/pkg/sysinfo"
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import "github.com/docker/docker/pkg/parsers"
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// SysInfo stores information about which features a kernel supports.
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// TODO Windows: Factor out platform specific capabilities.
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type SysInfo struct {
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// Whether the kernel supports AppArmor or not
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AppArmor bool
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// Whether the kernel supports Seccomp or not
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Seccomp bool
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cgroupMemInfo
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cgroupCPUInfo
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cgroupBlkioInfo
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cgroupCpusetInfo
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cgroupPids
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// Whether IPv4 forwarding is supported or not, if this was disabled, networking will not work
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IPv4ForwardingDisabled bool
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// Whether bridge-nf-call-iptables is supported or not
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BridgeNFCallIPTablesDisabled bool
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// Whether bridge-nf-call-ip6tables is supported or not
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BridgeNFCallIP6TablesDisabled bool
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// Whether the cgroup has the mountpoint of "devices" or not
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CgroupDevicesEnabled bool
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}
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type cgroupMemInfo struct {
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// Whether memory limit is supported or not
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MemoryLimit bool
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// Whether swap limit is supported or not
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SwapLimit bool
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// Whether soft limit is supported or not
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MemoryReservation bool
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// Whether OOM killer disable is supported or not
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OomKillDisable bool
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// Whether memory swappiness is supported or not
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MemorySwappiness bool
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// Whether kernel memory limit is supported or not
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KernelMemory bool
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}
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type cgroupCPUInfo struct {
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// Whether CPU shares is supported or not
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CPUShares bool
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// Whether CPU CFS(Completely Fair Scheduler) period is supported or not
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CPUCfsPeriod bool
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// Whether CPU CFS(Completely Fair Scheduler) quota is supported or not
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CPUCfsQuota bool
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// Whether CPU real-time period is supported or not
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CPURealtimePeriod bool
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// Whether CPU real-time runtime is supported or not
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CPURealtimeRuntime bool
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}
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type cgroupBlkioInfo struct {
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// Whether Block IO weight is supported or not
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BlkioWeight bool
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// Whether Block IO weight_device is supported or not
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BlkioWeightDevice bool
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// Whether Block IO read limit in bytes per second is supported or not
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BlkioReadBpsDevice bool
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// Whether Block IO write limit in bytes per second is supported or not
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BlkioWriteBpsDevice bool
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// Whether Block IO read limit in IO per second is supported or not
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BlkioReadIOpsDevice bool
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// Whether Block IO write limit in IO per second is supported or not
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BlkioWriteIOpsDevice bool
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}
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type cgroupCpusetInfo struct {
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// Whether Cpuset is supported or not
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Cpuset bool
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// Available Cpuset's cpus
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Cpus string
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// Available Cpuset's memory nodes
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Mems string
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}
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type cgroupPids struct {
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// Whether Pids Limit is supported or not
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PidsLimit bool
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}
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// IsCpusetCpusAvailable returns `true` if the provided string set is contained
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// in cgroup's cpuset.cpus set, `false` otherwise.
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// If error is not nil a parsing error occurred.
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func (c cgroupCpusetInfo) IsCpusetCpusAvailable(provided string) (bool, error) {
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return isCpusetListAvailable(provided, c.Cpus)
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}
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// IsCpusetMemsAvailable returns `true` if the provided string set is contained
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// in cgroup's cpuset.mems set, `false` otherwise.
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// If error is not nil a parsing error occurred.
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func (c cgroupCpusetInfo) IsCpusetMemsAvailable(provided string) (bool, error) {
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return isCpusetListAvailable(provided, c.Mems)
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}
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func isCpusetListAvailable(provided, available string) (bool, error) {
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parsedProvided, err := parsers.ParseUintList(provided)
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if err != nil {
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return false, err
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}
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parsedAvailable, err := parsers.ParseUintList(available)
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if err != nil {
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return false, err
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}
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for k := range parsedProvided {
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if !parsedAvailable[k] {
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return false, nil
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}
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}
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return true, nil
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}
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// Returns bit count of 1, used by NumCPU
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func popcnt(x uint64) (n byte) {
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x -= (x >> 1) & 0x5555555555555555
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x = (x>>2)&0x3333333333333333 + x&0x3333333333333333
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x += x >> 4
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x &= 0x0f0f0f0f0f0f0f0f
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x *= 0x0101010101010101
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return byte(x >> 56)
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}
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