node.c File Reference

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Macros
#define	MAX(a, b)   ((a) < (b) ? (b) : (a))
#define	MIN(a, b)   ((a) < (b) ? (a) : (b))
#define	VMWARE_LENGTH_BUG_WORKAROUND   0

Functions
static int	dpdk_mbuf_is_ip4 (struct rte_mbuf *mb)
static int	dpdk_mbuf_is_ip6 (struct rte_mbuf *mb)
static int	vlib_buffer_is_mpls (vlib_buffer_t *b)
static void	dpdk_rx_next_and_error_from_mb_flags_x1 (dpdk_device_t *xd, struct rte_mbuf *mb, vlib_buffer_t *b0, u8 *next0, u8 *error0)
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)
void	dpdk_efd_update_counters (dpdk_device_t *xd, u32 n_buffers, u16 enabled)
u32	is_efd_discardable (vlib_thread_main_t *tm, vlib_buffer_t *b0, struct rte_mbuf *mb)
static u32	dpdk_rx_burst (dpdk_main_t *dm, dpdk_device_t *xd, u16 queue_id)
static u32	dpdk_device_input (dpdk_main_t *dm, dpdk_device_t *xd, vlib_node_runtime_t *node, u32 cpu_index, u16 queue_id, int use_efd)
static void	poll_rate_limit (dpdk_main_t *dm)
static uword	dpdk_input (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *f)
	Main DPDK input node. More...
uword	dpdk_input_rss (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *f)
uword	dpdk_input_efd (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *f)
	CLIB_MULTIARCH_SELECT_FN (dpdk_input)
	CLIB_MULTIARCH_SELECT_FN (dpdk_input_rss)
	CLIB_MULTIARCH_SELECT_FN (dpdk_input_efd)
void	dpdk_set_next_node (dpdk_rx_next_t next, char *name)
void	set_efd_bitmap (u8 *bitmap, u32 value, u32 op)
void	efd_config (u32 enabled, u32 ip_prec, u32 ip_op, u32 mpls_exp, u32 mpls_op, u32 vlan_cos, u32 vlan_op)

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

Macro Definition Documentation

#define MAX	(		a,
			b
	)		((a) < (b) ? (b) : (a))

Definition at line 30 of file node.c.

#define MIN	(		a,
			b
	)		((a) < (b) ? (a) : (b))

Definition at line 34 of file node.c.

#define VMWARE_LENGTH_BUG_WORKAROUND   0

Definition at line 50 of file node.c.

Function Documentation

CLIB_MULTIARCH_SELECT_FN

(

dpdk_input

)

CLIB_MULTIARCH_SELECT_FN

(

dpdk_input_rss

)

CLIB_MULTIARCH_SELECT_FN

(

dpdk_input_efd

)

static u32 dpdk_device_input ( dpdk_main_t *  dm, dpdk_device_t *  xd, vlib_node_runtime_t *  node, u32  cpu_index, u16  queue_id, int  use_efd  )

inlinestatic

Definition at line 390 of file node.c.

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void dpdk_efd_update_counters	(	dpdk_device_t *	xd,
		u32	n_buffers,
		u16	enabled
	)

Definition at line 197 of file node.c.

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

static

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_EXT_RX_PKT_ERROR, PKT_EXT_RX_BAD_FCS PKT_RX_IP_CKSUM_BAD, PKT_RX_L4_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-gre-input
• per-interface redirection, controlled by xd->per_interface_next_index

Definition at line 709 of file node.c.

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uword dpdk_input_efd	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	f
	)

Definition at line 761 of file node.c.

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uword dpdk_input_rss	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	f
	)

Definition at line 735 of file node.c.

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static int dpdk_mbuf_is_ip4 ( struct rte_mbuf *  mb )

inlinestatic

Definition at line 59 of file node.c.

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static int dpdk_mbuf_is_ip6 ( struct rte_mbuf *  mb )

inlinestatic

Definition at line 65 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 281 of file node.c.

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static void dpdk_rx_next_and_error_from_mb_flags_x1 ( dpdk_device_t *  xd, struct rte_mbuf *  mb, vlib_buffer_t *  b0, u8 *  next0, u8 *  error0  )

inlinestatic

Definition at line 78 of file node.c.

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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
	)

Definition at line 142 of file node.c.

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void dpdk_set_next_node	(	dpdk_rx_next_t	next,
		char *	name
	)

Definition at line 828 of file node.c.

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void efd_config	(	u32	enabled,
		u32	ip_prec,
		u32	ip_op,
		u32	mpls_exp,
		u32	mpls_op,
		u32	vlan_cos,
		u32	vlan_op
	)

Definition at line 870 of file node.c.

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u32 is_efd_discardable	(	vlib_thread_main_t *	tm,
		vlib_buffer_t *	b0,
		struct rte_mbuf *	mb
	)

Definition at line 233 of file node.c.

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static void poll_rate_limit ( dpdk_main_t *  dm )

inlinestatic

Definition at line 649 of file node.c.

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void set_efd_bitmap	(	u8 *	bitmap,
		u32	value,
		u32	op
	)

Definition at line 854 of file node.c.

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static int vlib_buffer_is_mpls ( vlib_buffer_t *  b )

inlinestatic

Definition at line 71 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 52 of file node.c.

vlib_node_registration_t dpdk_input_node

Initial value:

= {
  .function = dpdk_input,
  .type = VLIB_NODE_TYPE_INPUT,
  .name = "dpdk-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,

  .n_next_nodes = DPDK_RX_N_NEXT,
  .next_nodes = {
    [DPDK_RX_NEXT_DROP] = "error-drop",
    [DPDK_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
    [DPDK_RX_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
    [DPDK_RX_NEXT_IP6_INPUT] = "ip6-input",
    [DPDK_RX_NEXT_MPLS_INPUT] = "mpls-gre-input",
  },
}

(constructor) VLIB_REGISTER_NODE (dpdk_input_node)

Definition at line 787 of file node.c.