node.c File Reference

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Functions
	STATIC_ASSERT ((PKT_RX_IP_CKSUM_BAD|PKT_RX_FDIR)< 256, "dpdk flags not un lower byte, fix needed")
static_always_inline uword	dpdk_process_subseq_segs (vlib_main_t *vm, vlib_buffer_t *b, struct rte_mbuf *mb, vlib_buffer_free_list_t *fl)
static_always_inline void	dpdk_prefetch_mbuf_x4 (struct rte_mbuf *mb[])
static_always_inline void	dpdk_prefetch_buffer_x4 (struct rte_mbuf *mb[])
static_always_inline u8	dpdk_ol_flags_extract (struct rte_mbuf **mb, u8 *flags, int count)
	Main DPDK input node. More...
static_always_inline uword	dpdk_process_rx_burst (vlib_main_t *vm, dpdk_per_thread_data_t *ptd, uword n_rx_packets, int maybe_multiseg, u8 *or_flagsp)
static_always_inline void	dpdk_process_flow_offload (dpdk_device_t *xd, dpdk_per_thread_data_t *ptd, uword n_rx_packets)
static_always_inline u32	dpdk_device_input (vlib_main_t *vm, dpdk_main_t *dm, dpdk_device_t *xd, vlib_node_runtime_t *node, u32 thread_index, u16 queue_id)
VLIB_NODE_FN()	dpdk_input_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *f)

Variables
static char *	dpdk_error_strings []
vlib_node_registration_t	dpdk_input_node
	(constructor) VLIB_REGISTER_NODE (dpdk_input_node) More...

Function Documentation

dpdk_device_input()

static_always_inline u32 dpdk_device_input	(	vlib_main_t *	vm,
		dpdk_main_t *	dm,
		dpdk_device_t *	xd,
		vlib_node_runtime_t *	node,
		u32	thread_index,
		u16	queue_id
	)

Definition at line 285 of file node.c.

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dpdk_input_node()

VLIB_NODE_FN() dpdk_input_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	f
	)

Definition at line 492 of file node.c.

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dpdk_ol_flags_extract()

static_always_inline u8 dpdk_ol_flags_extract	(	struct rte_mbuf **	mb,
		u8 *	flags,
		int	count
	)

Main DPDK input node.

Node Identifier:

dpdk-input

This is the main DPDK input node: across each assigned interface, call rte_eth_rx_burst(...) or similar to obtain a vector of packets to process. Derive vlib_buffer_t metadata from struct rte_mbuf metadata, Depending on the resulting metadata: adjust b->current_data, b->current_length and dispatch directly to ip4-input-no-checksum, or ip6-input. Trace the packet if required.

Parameters

vm	vlib_main_t corresponding to the current thread
node	vlib_node_runtime_t
f	vlib_frame_t input-node, not used.

Graph mechanics: buffer metadata, next index usage

Uses:

• struct rte_mbuf mb->ol_flags
  • PKT_RX_IP_CKSUM_BAD

Sets:

• b->error if the packet is to be dropped immediately
• b->current_data, b->current_length
  • adjusted as needed to skip the L2 header in direct-dispatch cases
• vnet_buffer(b)->sw_if_index[VLIB_RX]
  • rx interface sw_if_index
• vnet_buffer(b)->sw_if_index[VLIB_TX] = ~0
  • required by ipX-lookup
• b->flags
  • to indicate multi-segment pkts (VLIB_BUFFER_NEXT_PRESENT), etc.

Next Nodes:

• Static arcs to: error-drop, ethernet-input, ip4-input-no-checksum, ip6-input, mpls-input
• per-interface redirection, controlled by xd->per_interface_next_index

Definition at line 150 of file node.c.

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dpdk_prefetch_buffer_x4()

static_always_inline void dpdk_prefetch_buffer_x4

(

struct rte_mbuf *

mb[]

)

Definition at line 97 of file node.c.

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dpdk_prefetch_mbuf_x4()

static_always_inline void dpdk_prefetch_mbuf_x4

(

struct rte_mbuf *

mb[]

)

Definition at line 88 of file node.c.

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dpdk_process_flow_offload()

static_always_inline void dpdk_process_flow_offload	(	dpdk_device_t *	xd,
		dpdk_per_thread_data_t *	ptd,
		uword	n_rx_packets
	)

Definition at line 251 of file node.c.

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dpdk_process_rx_burst()

static_always_inline uword dpdk_process_rx_burst	(	vlib_main_t *	vm,
		dpdk_per_thread_data_t *	ptd,
		uword	n_rx_packets,
		int	maybe_multiseg,
		u8 *	or_flagsp
	)

Definition at line 165 of file node.c.

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dpdk_process_subseq_segs()

static_always_inline uword dpdk_process_subseq_segs	(	vlib_main_t *	vm,
		vlib_buffer_t *	b,
		struct rte_mbuf *	mb,
		vlib_buffer_free_list_t *	fl
	)

Definition at line 42 of file node.c.

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STATIC_ASSERT()

STATIC_ASSERT

(

)

Variable Documentation

dpdk_error_strings

char* dpdk_error_strings[]

static

Initial value:

= {
#define _(n,s) 
  foreach_dpdk_error

}

Definition at line 31 of file node.c.

dpdk_input_node

vlib_node_registration_t dpdk_input_node

Initial value:

= {
  .type = VLIB_NODE_TYPE_INPUT,
  .name = "dpdk-input",
  .sibling_of = "device-input",

  
  .state = VLIB_NODE_STATE_DISABLED,

  .format_buffer = format_ethernet_header_with_length,
  .format_trace = format_dpdk_rx_trace,

  .n_errors = DPDK_N_ERROR,
  .error_strings = dpdk_error_strings,
}

(constructor) VLIB_REGISTER_NODE (dpdk_input_node)

Definition at line 519 of file node.c.