l2_input_classify.c File Reference

L2 input classifier. More...

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Data Structures
struct	l2_input_classify_trace_t
	l2_input_classifier packet trace record. More...
struct	l2_input_classify_runtime_t
	vlib node runtime. More...

Macros
#define	foreach_l2_input_classify_error

Enumerations
enum	l2_input_classify_error_t { L2_INPUT_CLASSIFY_N_ERROR }

Functions
static u8 *	format_l2_input_classify_trace (u8 *s, va_list *args)
	Packet trace format function. More...
static uword	l2_input_classify_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	l2 input classifier node. More...
	VLIB_NODE_FUNCTION_MULTIARCH (l2_input_classify_node, l2_input_classify_node_fn)
clib_error_t *	l2_input_classify_init (vlib_main_t *vm)
	l2 input classsifier feature initialization. More...
clib_error_t *	l2_input_classify_worker_init (vlib_main_t *vm)
	VLIB_WORKER_INIT_FUNCTION (l2_input_classify_worker_init)
void	vnet_l2_input_classify_enable_disable (u32 sw_if_index, int enable_disable)
	Enable/disable l2 input classification on a specific interface. More...
int	vnet_l2_input_classify_set_tables (u32 sw_if_index, u32 ip4_table_index, u32 ip6_table_index, u32 other_table_index)
	Set l2 per-protocol, per-interface input classification tables. More...
static clib_error_t *	int_l2_input_classify_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)

Variables
l2_input_classify_main_t	l2_input_classify_main
	l2 input classifier main data structure. More...
vlib_node_registration_t	l2_input_classify_node
	(constructor) VLIB_REGISTER_NODE (l2_input_classify_node) More...
static char *	l2_input_classify_error_strings []
static vlib_cli_command_t	int_l2_input_classify_cli
	(constructor) VLIB_CLI_COMMAND (int_l2_input_classify_cli) More...

Detailed Description

L2 input classifier.

See also

vnet/vnet/classify/vnet_classify::c

vnet/vnet/classify/vnet_classify::h

Definition in file l2_input_classify.c.

Macro Definition Documentation

#define foreach_l2_input_classify_error

Value:

_(MISS, "Classify misses")                      \
_(HIT, "Classify hits")                         \
_(CHAIN_HIT, "Classify hits after chain walk")  \
_(DROP, "L2 Classify Drops")

Definition at line 75 of file l2_input_classify.c.

Enumeration Type Documentation

enum l2_input_classify_error_t

Enumerator
L2_INPUT_CLASSIFY_N_ERROR

Definition at line 81 of file l2_input_classify.c.

Function Documentation

static u8* format_l2_input_classify_trace ( u8 *  s, va_list *  args  )

static

Packet trace format function.

Definition at line 58 of file l2_input_classify.c.

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static clib_error_t* int_l2_input_classify_command_fn ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd  )

static

Definition at line 582 of file l2_input_classify.c.

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clib_error_t* l2_input_classify_init

(

vlib_main_t *

vm

)

l2 input classsifier feature initialization.

Definition at line 475 of file l2_input_classify.c.

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static uword l2_input_classify_node_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

l2 input classifier node.

Node Identifier:

l2-input-classify

This is the l2 input classifier dispatch node

Parameters

vm	vlib_main_t corresponding to the current thread.
node	vlib_node_runtime_t data for this node.
frame	vlib_frame_t whose contents should be dispatched.

Graph mechanics: buffer metadata, next index usage

Uses:

• (l2_input_classify_runtime_t *) rt->classify_table_index_by_sw_if_index
  • Head of the per-interface, per-protocol classifier table chain for a specific interface.
  • ~0 => send pkts to the next feature in the L2 feature chain.
• vnet_buffer(b)->sw_if_index[VLIB_RX]
  • Indicates the sw_if_index value of the interface that the packet was received on.
• vnet_buffer(b0)->l2.feature_bitmap
  • Used to steer packets across l2 features enabled on the interface
• (vnet_classify_entry_t) e0->next_index
  • Used to steer traffic when the classifier hits on a session
• (vnet_classify_entry_t) e0->advance
  • Signed quantity applied via vlib_buffer_advance when the classifier hits on a session
• (vnet_classify_table_t) t0->miss_next_index
  • Used to steer traffic when the classifier misses

Sets:

• vnet_buffer (b0)->l2_classify.table_index
  • Classifier table index of the first classifier table in the classifier table chain
• vnet_buffer (b0)->l2_classify.hash
  • Bounded-index extensible hash corresponding to the masked fields in the current packet
• vnet_buffer (b0)->l2.feature_bitmap
  • Used to steer packets across l2 features enabled on the interface
• vnet_buffer (b0)->l2_classify.opaque_index
  • Copied from the classifier session object upon classifier hit

Counters:

• L2_INPUT_CLASSIFY_ERROR_MISS Classifier misses
• L2_INPUT_CLASSIFY_ERROR_HIT Classifier hits
• L2_INPUT_CLASSIFY_ERROR_CHAIN_HIT Classifier hits in other than the first table

Definition at line 146 of file l2_input_classify.c.

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clib_error_t* l2_input_classify_worker_init

(

vlib_main_t *

vm

)

Definition at line 501 of file l2_input_classify.c.

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VLIB_NODE_FUNCTION_MULTIARCH	(	l2_input_classify_node	,
		l2_input_classify_node_fn
	)

VLIB_WORKER_INIT_FUNCTION

(

l2_input_classify_worker_init

)

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void vnet_l2_input_classify_enable_disable	(	u32	sw_if_index,
		int	enable_disable
	)

Enable/disable l2 input classification on a specific interface.

Definition at line 518 of file l2_input_classify.c.

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int vnet_l2_input_classify_set_tables	(	u32	sw_if_index,
		u32	ip4_table_index,
		u32	ip6_table_index,
		u32	other_table_index
	)

Set l2 per-protocol, per-interface input classification tables.

Parameters

sw_if_index	interface handle
ip4_table_index	ip4 classification table index, or ~0
ip6_table_index	ip6 classification table index, or ~0
other_table_index	non-ip4, non-ip6 classification table index, or ~0

Returns

0 on success, VNET_API_ERROR_NO_SUCH_TABLE, TABLE2, TABLE3 if the indicated (non-~0) table does not exist.

Definition at line 536 of file l2_input_classify.c.

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Variable Documentation

vlib_cli_command_t int_l2_input_classify_cli

static

Initial value:

= {
  .path = "set interface l2 input classify",
  .short_help =
  "set interface l2 input classify intfc <interface-name> [ip4-table <n>]\n"
  "  [ip6-table <n>] [other-table <n>]",
  .function = int_l2_input_classify_command_fn,
}

(constructor) VLIB_CLI_COMMAND (int_l2_input_classify_cli)

Definition at line 647 of file l2_input_classify.c.

char* l2_input_classify_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_l2_input_classify_error

}

Definition at line 89 of file l2_input_classify.c.

l2_input_classify_main_t l2_input_classify_main

l2 input classifier main data structure.

Definition at line 71 of file l2_input_classify.c.

vlib_node_registration_t l2_input_classify_node

Initial value:

= {
  .function = l2_input_classify_node_fn,
  .name = "l2-input-classify",
  .vector_size = sizeof (u32),
  .format_trace = format_l2_input_classify_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(l2_input_classify_error_strings),
  .error_strings = l2_input_classify_error_strings,

  .runtime_data_bytes = sizeof (l2_input_classify_runtime_t),

  .n_next_nodes = L2_INPUT_CLASSIFY_N_NEXT,

  
  .next_nodes = {
    [L2_INPUT_CLASSIFY_NEXT_DROP]  = "error-drop",
    [L2_INPUT_CLASSIFY_NEXT_ETHERNET_INPUT] = "ethernet-input-not-l2",
    [L2_INPUT_CLASSIFY_NEXT_IP4_INPUT] = "ip4-input",
    [L2_INPUT_CLASSIFY_NEXT_IP6_INPUT] = "ip6-input",
    [L2_INPUT_CLASSIFY_NEXT_LI] = "li-hit",
  },
}

(constructor) VLIB_REGISTER_NODE (l2_input_classify_node)

Definition at line 73 of file l2_input_classify.c.