policymap

package
v1.6.12 Latest Latest
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 Go to latest Published: Sep 30, 2020 License: Apache-2.0 Imports: 10 Imported by: 0

Documentation

Overview

+groupName=maps

Index

Constants

View Source 
const (
	// CallMapName is the name of the map to do tail calls into policy
	// enforcement programs
	CallMapName = "cilium_policy"

	// MapName is the prefix for endpoint-specific policy maps which map
	// identity+ports+direction to whether the policy allows communication
	// with that identity on that port for that direction.
	MapName = CallMapName + "_"

	// ProgArrayMaxEntries is the upper limit of entries in the program
	// array for the tail calls to jump into the endpoint specific policy
	// programs. This number *MUST* be identical to the maximum endponit ID.
	ProgArrayMaxEntries = ^uint16(0)

	// AllPorts is used to ignore the L4 ports in PolicyMap lookups; all ports
	// are allowed. In the datapath, this is represented with the value 0 in the
	// port field of map elements.
	AllPorts = uint16(0)
)

Variables

View Source 
var (

	// MaxEntries is the upper limit of entries in the per endpoint policy
	// table
	MaxEntries = 16384
)

Functions

func CallString 

func CallString(id uint16) string

CallString returns the string which indicates the calls map by index in the ELF, and index into that call map for a specific endpoint.

Derived from __section_tail(CILIUM_MAP_CALLS, NAME) per bpf/lib/tailcall.h.

func InitMapInfo 

func InitMapInfo(maxEntries int)

InitMapInfo updates the map info defaults for policy maps.

func RemoveGlobalMapping 

func RemoveGlobalMapping(id uint32) error

RemoveGlobalMapping removes the mapping from the specified endpoint ID to the BPF policy program for that endpoint.

Types

type PlumbingKey 

type PlumbingKey struct {
	// contains filtered or unexported fields
}

+k8s:deepcopy-gen=true +k8s:deepcopy-gen:interfaces=github.com/cilium/cilium/pkg/bpf.MapKey

func (*PlumbingKey) DeepCopy 

func (in *PlumbingKey) DeepCopy() *PlumbingKey

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PlumbingKey.

func (*PlumbingKey) DeepCopyInto 

func (in *PlumbingKey) DeepCopyInto(out *PlumbingKey)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

func (*PlumbingKey) DeepCopyMapKey 

func (in *PlumbingKey) DeepCopyMapKey() bpf.MapKey

DeepCopyMapKey is an autogenerated deepcopy function, copying the receiver, creating a new bpf.MapKey.

func (*PlumbingKey) GetKeyPtr 

func (k *PlumbingKey) GetKeyPtr() unsafe.Pointer

func (*PlumbingKey) NewValue 

func (k *PlumbingKey) NewValue() bpf.MapValue

func (*PlumbingKey) String 

func (k *PlumbingKey) String() string

type PlumbingValue 

type PlumbingValue struct {
	// contains filtered or unexported fields
}

+k8s:deepcopy-gen=true +k8s:deepcopy-gen:interfaces=github.com/cilium/cilium/pkg/bpf.MapValue

func (*PlumbingValue) DeepCopy 

func (in *PlumbingValue) DeepCopy() *PlumbingValue

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PlumbingValue.

func (*PlumbingValue) DeepCopyInto 

func (in *PlumbingValue) DeepCopyInto(out *PlumbingValue)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

func (*PlumbingValue) DeepCopyMapValue 

func (in *PlumbingValue) DeepCopyMapValue() bpf.MapValue

DeepCopyMapValue is an autogenerated deepcopy function, copying the receiver, creating a new bpf.MapValue.

func (*PlumbingValue) GetValuePtr 

func (v *PlumbingValue) GetValuePtr() unsafe.Pointer

func (*PlumbingValue) String 

func (v *PlumbingValue) String() string

type PolicyEntriesDump 

type PolicyEntriesDump []PolicyEntryDump

PolicyEntriesDump is a wrapper for a slice of PolicyEntryDump

func (PolicyEntriesDump) Less 

func (p PolicyEntriesDump) Less(i, j int) bool

Less returns true if the element in index `i` has the value of TrafficDirection lower than `j`'s TrafficDirection or if the element in index `i` has the value of TrafficDirection lower and equal than `j`'s TrafficDirection and the identity of element `i` is lower than the Identity of element j.

type PolicyEntry 

type PolicyEntry struct {
	ProxyPort uint16 // In network byte-order
	Pad0      uint16
	Pad1      uint16
	Pad2      uint16
	Packets   uint64
	Bytes     uint64
}

PolicyEntry represents an entry in the BPF policy map for an endpoint. It must match the layout of policy_entry in bpf/lib/common.h. +k8s:deepcopy-gen=true +k8s:deepcopy-gen:interfaces=github.com/cilium/cilium/pkg/bpf.MapValue

func (*PolicyEntry) Add 

func (pe *PolicyEntry) Add(oPe PolicyEntry)

func (*PolicyEntry) DeepCopy 

func (in *PolicyEntry) DeepCopy() *PolicyEntry

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PolicyEntry.

func (*PolicyEntry) DeepCopyInto 

func (in *PolicyEntry) DeepCopyInto(out *PolicyEntry)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

func (*PolicyEntry) DeepCopyMapValue 

func (in *PolicyEntry) DeepCopyMapValue() bpf.MapValue

DeepCopyMapValue is an autogenerated deepcopy function, copying the receiver, creating a new bpf.MapValue.

func (*PolicyEntry) GetValuePtr 

func (pe *PolicyEntry) GetValuePtr() unsafe.Pointer

func (*PolicyEntry) NewValue 

func (pe *PolicyEntry) NewValue() bpf.MapValue

func (*PolicyEntry) String 

func (pe *PolicyEntry) String() string

type PolicyEntryDump 

type PolicyEntryDump struct {
	PolicyEntry
	Key PolicyKey
}

type PolicyKey 

type PolicyKey struct {
	Identity         uint32
	DestPort         uint16 // In network byte-order
	Nexthdr          uint8
	TrafficDirection uint8
}

PolicyKey represents a key in the BPF policy map for an endpoint. It must match the layout of policy_key in bpf/lib/common.h. +k8s:deepcopy-gen=true +k8s:deepcopy-gen:interfaces=github.com/cilium/cilium/pkg/bpf.MapKey

func (*PolicyKey) DeepCopy 

func (in *PolicyKey) DeepCopy() *PolicyKey

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PolicyKey.

func (*PolicyKey) DeepCopyInto 

func (in *PolicyKey) DeepCopyInto(out *PolicyKey)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

func (*PolicyKey) DeepCopyMapKey 

func (in *PolicyKey) DeepCopyMapKey() bpf.MapKey

DeepCopyMapKey is an autogenerated deepcopy function, copying the receiver, creating a new bpf.MapKey.

func (*PolicyKey) GetKeyPtr 

func (key *PolicyKey) GetKeyPtr() unsafe.Pointer

func (*PolicyKey) NewValue 

func (key *PolicyKey) NewValue() bpf.MapValue

func (*PolicyKey) String 

func (key *PolicyKey) String() string

func (*PolicyKey) ToHost 

func (key *PolicyKey) ToHost() PolicyKey

ToHost returns a copy of key with fields converted from network byte-order to host-byte-order if necessary.

func (*PolicyKey) ToNetwork 

func (key *PolicyKey) ToNetwork() PolicyKey

ToNetwork returns a copy of key with fields converted from host byte-order to network-byte-order if necessary.

type PolicyMap 

type PolicyMap struct {
	*bpf.Map
}

func Open 

func Open(path string) (*PolicyMap, error)

Open opens the policymap at the specified path.

func OpenOrCreate 

func OpenOrCreate(path string) (*PolicyMap, bool, error)

OpenOrCreate opens (or creates) a policy map at the specified path, which is used to govern which peer identities can communicate with the endpoint protected by this map.

func (*PolicyMap) Allow 

func (pm *PolicyMap) Allow(id uint32, dport uint16, proto u8proto.U8proto, trafficDirection trafficdirection.TrafficDirection, proxyPort uint16) error

Allow pushes an entry into the PolicyMap to allow traffic in the given `trafficDirection` for identity `id` with destination port `dport` over protocol `proto`. It is assumed that `dport` and `proxyPort` are in host byte-order.

func (*PolicyMap) AllowKey 

func (pm *PolicyMap) AllowKey(k PolicyKey, proxyPort uint16) error

AllowKey pushes an entry into the PolicyMap for the given PolicyKey k. Returns an error if the update of the PolicyMap fails.

func (*PolicyMap) Delete 

func (pm *PolicyMap) Delete(id uint32, dport uint16, proto u8proto.U8proto, trafficDirection trafficdirection.TrafficDirection) error

Delete removes an entry from the PolicyMap for identity `id` sending traffic in direction `trafficDirection` with destination port `dport` over protocol `proto`. It is assumed that `dport` is in host byte-order. Returns an error if the deletion did not succeed.

func (*PolicyMap) DeleteEntry 

func (pm *PolicyMap) DeleteEntry(entry *PolicyEntryDump) error

DeleteEntry removes an entry from the PolicyMap. It can be used in conjunction with DumpToSlice() to inspect and delete map entries.

func (*PolicyMap) DeleteKeyWithErrno 

func (pm *PolicyMap) DeleteKeyWithErrno(key PolicyKey) (error, syscall.Errno)

DeleteKey deletes the key-value pair from the given PolicyMap with PolicyKey k. Returns an error if deletion from the PolicyMap fails.

func (*PolicyMap) Dump 

func (pm *PolicyMap) Dump() (string, error)

func (*PolicyMap) DumpToSlice 

func (pm *PolicyMap) DumpToSlice() (PolicyEntriesDump, error)

func (*PolicyMap) Exists 

func (pm *PolicyMap) Exists(id uint32, dport uint16, proto u8proto.U8proto, trafficDirection trafficdirection.TrafficDirection) bool

Exists determines whether PolicyMap currently contains an entry that allows traffic in `trafficDirection` for identity `id` with destination port `dport`over protocol `proto`. It is assumed that `dport` is in host byte-order.

func (*PolicyMap) String 

func (pm *PolicyMap) String() string

String returns a human-readable string representing the policy map.

type PolicyPlumbingMap 

type PolicyPlumbingMap struct {
	*bpf.Map
}

PolicyPlumbingMap maps endpoint IDs to the fd for the program which implements its policy.

func OpenCallMap 

func OpenCallMap() (*PolicyPlumbingMap, error)

OpenCallMap opens the map that maps endpoint IDs to program file descriptors, which allows tail calling into the policy datapath code from other BPF programs.

Source Files

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