EBPF::TCIngressPipeline Class Reference

Inheritance diagram for EBPF::TCIngressPipeline:

Public Member Functions
	TCIngressPipeline (cstring name, const EbpfOptions &options, P4::ReferenceMap *refMap, P4::TypeMap *typeMap)
void	emitGlobalMetadataInitializer (CodeBuilder *builder) override
void	emitTrafficManager (CodeBuilder *builder) override
Public Member Functions inherited from EBPF::EBPFIngressPipeline
	EBPFIngressPipeline (cstring name, const EbpfOptions &options, P4::ReferenceMap *refMap, P4::TypeMap *typeMap)
	DECLARE_TYPEINFO (EBPFIngressPipeline, EBPFPipeline)
void	emit (CodeBuilder *builder) override
void	emitPSAControlInputMetadata (CodeBuilder *builder) override
void	emitPSAControlOutputMetadata (CodeBuilder *builder) override
void	emitSharedMetadataInitializer (CodeBuilder *builder)
Public Member Functions inherited from EBPF::EBPFPipeline
	EBPFPipeline (cstring name, const EbpfOptions &options, P4::ReferenceMap *refMap, P4::TypeMap *typeMap)
	DECLARE_TYPEINFO (EBPFPipeline, EBPFProgram)
virtual cstring	dropReturnCode ()
void	emitCPUMAPHeadersInitializers (CodeBuilder *builder)
	Generates a pointer to struct hdr_md. The pointer is used to access data from per-CPU map.
virtual void	emitCPUMAPInitializers (CodeBuilder *builder)
virtual void	emitCPUMAPLookup (CodeBuilder *builder)
void	emitHeaderInstances (CodeBuilder *builder) override
void	emitHeadersFromCPUMAP (CodeBuilder *builder)
void	emitInputPortMapping (CodeBuilder *builder)
void	emitLocalHeaderInstancesAsPointers (CodeBuilder *builder)
	Generates a pointer to struct Headers_t and puts it on the BPF program's stack.
void	emitLocalVariables (CodeBuilder *builder) override
	Generates a set of helper variables that are used during packet processing.
void	emitMetadataFromCPUMAP (CodeBuilder *builder)
virtual void	emitPacketLength (CodeBuilder *builder)
virtual void	emitTimestamp (CodeBuilder *builder)
void	emitUserMetadataInstance (CodeBuilder *builder)
virtual cstring	forwardReturnCode ()
bool	hasAnyMeter () const
bool	isEmpty () const
bool	shouldEmitTimestamp () const
Public Member Functions inherited from EBPF::EBPFProgram
	EBPFProgram (const EbpfOptions &options, const IR::P4Program *program, P4::ReferenceMap *refMap, P4::TypeMap *typeMap, const IR::ToplevelBlock *toplevel)
	return 'true' on success
virtual bool	build ()
	DECLARE_TYPEINFO (EBPFProgram, EBPFObject)
virtual void	emitC (CodeBuilder *builder, const std::filesystem::path &headerFile)
virtual void	emitCommonPreamble (CodeBuilder *builder)
virtual void	emitGeneratedComment (CodeBuilder *builder)
virtual void	emitH (CodeBuilder *builder, const std::filesystem::path &headerFile)
Public Member Functions inherited from EBPF::EBPFObject
	DECLARE_TYPEINFO (EBPFObject)
Public Member Functions inherited from ICastable
template<typename T >
T &	as ()
	Tries to convert the class to type T. A BUG occurs if the cast fails.
template<typename T >
const T &	as () const
	Tries to convert the class to type T. A BUG occurs if the cast fails.
template<typename T >
T *	checkedTo ()
	Performs a checked cast. A BUG occurs if the cast fails.
template<typename T >
const T *	checkedTo () const
	Performs a checked cast. A BUG occurs if the cast fails.
Public Member Functions inherited from RTTI::Base
template<typename T >
bool	is () const noexcept
virtual bool	isA (TypeId typeId) const noexcept=0
template<typename T >
const T *	to () const noexcept
	Same as to, but returns const pointer to T.
template<typename T >
T *	to () noexcept
virtual TypeId	typeId () const noexcept=0

Additional Inherited Members
Static Public Member Functions inherited from EBPF::EBPFObject
static cstring	externalName (const IR::IDeclaration *declaration)
static cstring	getSpecializedTypeName (const IR::Declaration_Instance *di)
static cstring	getTypeName (const IR::Declaration_Instance *di)
Public Attributes inherited from EBPF::EBPFIngressPipeline
int	actUnspecCode
unsigned int	maxResubmitDepth
Public Attributes inherited from EBPF::EBPFPipeline
cstring	compilerGlobalMetadata
	A name of an internal variable storing global metadata.
cstring	contextVar
	Variable name storing pointer to eBPF packet descriptor (e.g., __sk_buff).
EBPFControlPSA *	control
EBPFDeparserPSA *	deparser
cstring	ifindexVar
	Variable storing ingress interface index.
cstring	inputPortVar
	A variable to store ifindex after mapping (e.g. due to recirculation).
cstring	name
	A custom name of eBPF program.
cstring	oneKey
	A variable name storing "1" value. Used to access BPF array map index.
unsigned	packetMark
	A unique mark used to differentiate packets processed by P4/eBPF from others.
cstring	packetPathVar
	Variables storing global metadata (packet_path & instance).
cstring	pktInstanceVar
cstring	priorityVar
	Variable storing skb->priority value (TC only).
cstring	sectionName
	eBPF section name, which should a concatenation of classifier/ + a custom name.
cstring	timestampVar
	Variable name storing current timestamp retrieved from bpf_ktime_get_ns().
Public Attributes inherited from EBPF::EBPFProgram
cstring	arrayIndexType = "u32"_cs
	TODO: this should be a compiler option probably.
cstring	byteVar
EBPFControl *	control
EBPFDeparser *	deparser
	Deparser may be NULL if not supported (e.g. ebpfFilter package).
cstring	endLabel
cstring	errorEnum
cstring	errorVar
cstring	functionName
cstring	headerStartVar
cstring	lengthVar
cstring	license = "GPL"_cs
EBPFModel &	model
cstring	offsetVar
const EbpfOptions &	options
cstring	packetEndVar
cstring	packetStartVar
EBPFParser *	parser
const IR::P4Program *	program
const Target *	progTarget
P4::ReferenceMap *	refMap
const IR::ToplevelBlock *	toplevel
P4::TypeMap *	typeMap
cstring	zeroKey
Protected Member Functions inherited from EBPF::EBPFProgram
virtual void	emitPipeline (CodeBuilder *builder)
virtual void	emitPreamble (CodeBuilder *builder)
virtual void	emitTypes (CodeBuilder *builder)
virtual bool	isLibraryMethod (cstring methodName)
Protected Member Functions inherited from RTTI::Base
virtual const void *	toImpl (TypeId typeId) const noexcept=0

Member Function Documentation

emitGlobalMetadataInitializer()

void EBPF::TCIngressPipeline::emitGlobalMetadataInitializer ( CodeBuilder * builder )

overridevirtual

Generates a pointer to skb->cb and maps it to psa_global_metadata to access global metadata shared between pipelines.

Reimplemented from EBPF::EBPFPipeline.

Reimplemented in EBPF::TCTrafficManagerForXDP, and TC::TCIngressPipelinePNA.

emitTrafficManager()

void EBPF::TCIngressPipeline::emitTrafficManager ( CodeBuilder * builder )

overridevirtual

The Traffic Manager for Ingress pipeline implements:

• Multicast handling
• send to port

Implements EBPF::EBPFPipeline.

Reimplemented in TC::TCIngressPipelinePNA.