node.c File Reference

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Functions
static u32	dpdk_rx_next_from_etype (struct rte_mbuf *mb)
static void	dpdk_rx_error_from_mb (struct rte_mbuf *mb, u32 *next, u8 *error)
static void	dpdk_rx_trace (dpdk_main_t *dm, vlib_node_runtime_t *node, dpdk_device_t *xd, u16 queue_id, u32 *buffers, uword n_buffers)
static u32	dpdk_rx_burst (dpdk_main_t *dm, dpdk_device_t *xd, u16 queue_id)
static_always_inline void	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_buffer (struct rte_mbuf *mb)
static_always_inline void	dpdk_prefetch_ethertype (struct rte_mbuf *mb)
static_always_inline u32	dpdk_device_input (dpdk_main_t *dm, dpdk_device_t *xd, vlib_node_runtime_t *node, u32 thread_index, u16 queue_id, int maybe_multiseg)
static void	poll_rate_limit (dpdk_main_t *dm)
uword CLIB_MULTIARCH_FN()	dpdk_input (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *f)
	Main DPDK input node. More...
static void __clib_constructor	dpdk_input_multiarch_select (void)

Variables
static char *	dpdk_error_strings []
vlib_node_registration_t	dpdk_input_node
	(constructor) VLIB_REGISTER_NODE (dpdk_input_node) More...
vlib_node_function_t __clib_weak	dpdk_input_avx512
vlib_node_function_t __clib_weak	dpdk_input_avx2

Function Documentation

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

Definition at line 221 of file node.c.

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uword CLIB_MULTIARCH_FN() dpdk_input	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	f
	)

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. Handle early packet discard. 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
• RTE_ETH_IS_xxx_HDR(mb->packet_type)
  • packet classification result

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 586 of file node.c.

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static void __clib_constructor dpdk_input_multiarch_select ( void  )

static

Definition at line 641 of file node.c.

static_always_inline void dpdk_prefetch_buffer

(

struct rte_mbuf *

mb

)

Definition at line 201 of file node.c.

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static_always_inline void dpdk_prefetch_ethertype

(

struct rte_mbuf *

mb

)

Definition at line 209 of file node.c.

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static_always_inline void 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 156 of file node.c.

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static u32 dpdk_rx_burst ( dpdk_main_t *  dm, dpdk_device_t *  xd, u16  queue_id  )

inlinestatic

Definition at line 122 of file node.c.

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static void dpdk_rx_error_from_mb ( struct rte_mbuf *  mb, u32 *  next, u8 *  error  )

inlinestatic

Definition at line 60 of file node.c.

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static u32 dpdk_rx_next_from_etype ( struct rte_mbuf *  mb )

inlinestatic

Definition at line 40 of file node.c.

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static void dpdk_rx_trace ( dpdk_main_t *  dm, vlib_node_runtime_t *  node, dpdk_device_t *  xd, u16  queue_id, u32 *  buffers, uword  n_buffers  )

static

Definition at line 72 of file node.c.

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static void poll_rate_limit ( dpdk_main_t *  dm )

inlinestatic

Definition at line 527 of file node.c.

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Variable Documentation

char* dpdk_error_strings[]

static

Initial value:

= {
#define _(n,s) 
  foreach_dpdk_error

}

Definition at line 32 of file node.c.

vlib_node_function_t __clib_weak dpdk_input_avx2

Definition at line 637 of file node.c.

vlib_node_function_t __clib_weak dpdk_input_avx512

Definition at line 636 of file node.c.

vlib_node_registration_t dpdk_input_node

Initial value:

= {
  .function = dpdk_input,
  .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_dma_trace,

  .n_errors = DPDK_N_ERROR,
  .error_strings = dpdk_error_strings,
}

(constructor) VLIB_REGISTER_NODE (dpdk_input_node)

Definition at line 619 of file node.c.