policy

package
v0.0.1 Latest Latest
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 Go to latest Published: Mar 17, 2024 License: Apache-2.0 Imports: 19 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// outer maps
	UIDFilterMapVersion         = "uid_filter_version"
	PIDFilterMapVersion         = "pid_filter_version"
	MntNSFilterMapVersion       = "mnt_ns_filter_version"
	PidNSFilterMapVersion       = "pid_ns_filter_version"
	UTSFilterMapVersion         = "uts_ns_filter_version"
	CommFilterMapVersion        = "comm_filter_version"
	CgroupIdFilterVersion       = "cgroup_id_filter_version"
	ProcessTreeFilterMapVersion = "process_tree_map_version"
	BinaryFilterMapVersion      = "binary_filter_version"
	PoliciesConfigVersion       = "policies_config_version"

	// inner maps
	UIDFilterMap         = "uid_filter"
	PIDFilterMap         = "pid_filter"
	MntNSFilterMap       = "mnt_ns_filter"
	PidNSFilterMap       = "pid_ns_filter"
	UTSFilterMap         = "uts_ns_filter"
	CommFilterMap        = "comm_filter"
	CgroupIdFilterMap    = "cgroup_id_filter"
	ProcessTreeFilterMap = "process_tree_map"
	BinaryFilterMap      = "binary_filter"
	PoliciesConfigMap    = "policies_config_map"

	ProcInfoMap = "proc_info_map"
)
View Source 
const (
	MaxPolicies   int = 64
	AllPoliciesOn     = ^uint64(0)
)

Variables

View Source 
var AlwaysSubmit = events.EventState{
	Submit: AllPoliciesOn,
}

Functions

func PoliciesMaxExceededError 

func PoliciesMaxExceededError() error

func PoliciesOutOfRangeError 

func PoliciesOutOfRangeError(idx int) error

func PolicyAlreadyExists 

func PolicyAlreadyExists(policy *Policy, id int) error

func PolicyNilError 

func PolicyNilError() error

func PolicyNotFoundByIDError 

func PolicyNotFoundByIDError(idx int) error

func PolicyNotFoundByNameError 

func PolicyNotFoundByNameError(name string) error

func Snapshots 

func Snapshots() *snapshots

Types

type Policies 

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

TODO: refactor filterEnabledPoliciesMap and filterUserlandPoliciesMap maps to use int (Policy id) as key instead of *Policy. TODO: create a new map with policy name as key to speed up LookupByName()

func NewPolicies 

func NewPolicies() *Policies

func (*Policies) Add 

func (ps *Policies) Add(p *Policy) error

Add adds a policy to Policies. Its ID (index) is set to the first room found. Returns nil if policy is already inserted.

func (*Policies) Clone 

func (ps *Policies) Clone() utils.Cloner

Clone returns a deep copy of Policies.

func (*Policies) ContainerFilterEnabled 

func (ps *Policies) ContainerFilterEnabled() uint64

ContainerFilterEnabled returns a bitmap of policies that have at least one container filter type enabled.

func (*Policies) Count 

func (ps *Policies) Count() int

func (*Policies) Delete 

func (ps *Policies) Delete(id int) error

Delete deletes a policy from Policies.

func (*Policies) FilterableInUserland 

func (ps *Policies) FilterableInUserland() uint64

FilterableInUserland returns a bitmap of policies that must be filtered in userland (ArgFilter, RetFilter, ContextFilter, UIDFilter and PIDFilter).

func (*Policies) FilterableInUserlandMap 

func (ps *Policies) FilterableInUserlandMap() map[*Policy]int

FilterableInUserlandMap returns a reduced policies map which must be filtered in userland (ArgFilter, RetFilter, ContextFilter, UIDFilter and PIDFilter).

It does not return a copy of the map, so it must be used only for iteration and after its snapshot has been stored, otherwise it may be in the initial state and not contain all policies computed.

func (*Policies) LookupById 

func (ps *Policies) LookupById(id int) (*Policy, error)

LookupById returns a policy by ID.

func (*Policies) LookupByName 

func (ps *Policies) LookupByName(name string) (*Policy, error)

LookupByName returns a policy by name.

func (*Policies) Map 

func (ps *Policies) Map() map[*Policy]int

Map returns map with all policies.

It does not return a copy of the map, so it must be used only for iteration and after its snapshot has been stored, otherwise it may be in the initial state and not contain all policies computed.

func (*Policies) MatchedNames 

func (ps *Policies) MatchedNames(matched uint64) []string

MatchedNames returns a list of matched policies names based on the given matched bitmap.

func (*Policies) PIDFilterMax 

func (ps *Policies) PIDFilterMax() uint64

func (*Policies) PIDFilterMin 

func (ps *Policies) PIDFilterMin() uint64

func (*Policies) Set 

func (ps *Policies) Set(p *Policy) error

func (*Policies) SetVersion 

func (ps *Policies) SetVersion(version uint16)

func (*Policies) UIDFilterMax 

func (ps *Policies) UIDFilterMax() uint64

func (*Policies) UIDFilterMin 

func (ps *Policies) UIDFilterMin() uint64

func (*Policies) UpdateBPF 

func (ps *Policies) UpdateBPF(
	bpfModule *bpf.Module,
	cts *containers.Containers,
	eventsState map[events.ID]events.EventState,
	eventsParams map[events.ID][]bufferdecoder.ArgType,
	createNewMaps bool,
	updateProcTree bool,
) (*PoliciesConfig, error)

UpdateBPF updates the BPF maps with the policies filters. createNewMaps indicates whether new maps should be created or not. updateProcTree indicates whether the process tree map should be updated or not.

func (*Policies) Version 

func (ps *Policies) Version() uint16

type PoliciesConfig 

type PoliciesConfig struct {
	UIDFilterEnabledScopes      uint64
	PIDFilterEnabledScopes      uint64
	MntNsFilterEnabledScopes    uint64
	PidNsFilterEnabledScopes    uint64
	UtsNsFilterEnabledScopes    uint64
	CommFilterEnabledScopes     uint64
	CgroupIdFilterEnabledScopes uint64
	ContFilterEnabledScopes     uint64
	NewContFilterEnabledScopes  uint64
	NewPidFilterEnabledScopes   uint64
	ProcTreeFilterEnabledScopes uint64
	BinPathFilterEnabledScopes  uint64
	FollowFilterEnabledScopes   uint64

	UIDFilterOutScopes      uint64
	PIDFilterOutScopes      uint64
	MntNsFilterOutScopes    uint64
	PidNsFilterOutScopes    uint64
	UtsNsFilterOutScopes    uint64
	CommFilterOutScopes     uint64
	CgroupIdFilterOutScopes uint64
	ContFilterOutScopes     uint64
	NewContFilterOutScopes  uint64
	NewPidFilterOutScopes   uint64
	ProcTreeFilterOutScopes uint64
	BinPathFilterOutScopes  uint64

	EnabledScopes uint64

	UidMax uint64
	UidMin uint64
	PidMax uint64
	PidMin uint64
}

PoliciesConfig mirrors the C struct policies_config (policies_config_t). Order of fields is important, as it is used as a value for the PoliciesConfigMap BPF map.

func (*PoliciesConfig) UpdateBPF 

func (pc *PoliciesConfig) UpdateBPF(bpfConfigMap *bpf.BPFMapLow) error

type Policy 

type Policy struct {
	ID                int
	Name              string
	EventsToTrace     map[events.ID]string
	UIDFilter         *filters.UIntFilter[uint32]
	PIDFilter         *filters.UIntFilter[uint32]
	NewPidFilter      *filters.BoolFilter
	MntNSFilter       *filters.UIntFilter[uint64]
	PidNSFilter       *filters.UIntFilter[uint64]
	UTSFilter         *filters.StringFilter
	CommFilter        *filters.StringFilter
	ContFilter        *filters.BoolFilter
	NewContFilter     *filters.BoolFilter
	ContIDFilter      *filters.StringFilter
	RetFilter         *filters.RetFilter
	ArgFilter         *filters.ArgFilter
	ContextFilter     *filters.ContextFilter
	ProcessTreeFilter *filters.ProcessTreeFilter
	BinaryFilter      *filters.BinaryFilter
	Follow            bool
}

func NewPolicy 

func NewPolicy() *Policy

func (*Policy) Clone 

func (p *Policy) Clone() utils.Cloner

func (*Policy) ContainerFilterEnabled 

func (p *Policy) ContainerFilterEnabled() bool

ContainerFilterEnabled returns true when the policy has at least one container filter type enabled

Source Files

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