#include <vppinfra/sparse_vec.h>
-typedef struct {
+/**
+ * @file
+ * @brief Ethernet Forwarding.
+ *
+ * Code in this file handles forwarding Layer 2 packets. This file calls
+ * the FIB lookup, packet learning and the packet flooding as necessary.
+ * Packet is then sent to the next graph node.
+ */
+
+typedef struct
+{
- // Hash table
- BVT(clib_bihash) *mac_table;
+ /* Hash table */
+ BVT (clib_bihash) * mac_table;
- // next node index for the L3 input node of each ethertype
+ /* next node index for the L3 input node of each ethertype */
next_by_ethertype_t l3_next;
/* convenience variables */
- vlib_main_t * vlib_main;
- vnet_main_t * vnet_main;
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
} l2fwd_main_t;
-typedef struct {
- /* per-pkt trace data */
+typedef struct
+{
+ /* per-pkt trace data */
u8 src[6];
u8 dst[6];
u32 sw_if_index;
} l2fwd_trace_t;
/* packet trace format function */
-static u8 * format_l2fwd_trace (u8 * s, va_list * args)
+static u8 *
+format_l2fwd_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- l2fwd_trace_t * t = va_arg (*args, l2fwd_trace_t *);
-
+ l2fwd_trace_t *t = va_arg (*args, l2fwd_trace_t *);
+
s = format (s, "l2-fwd: sw_if_index %d dst %U src %U bd_index %d",
t->sw_if_index,
- format_ethernet_address, t->dst,
- format_ethernet_address, t->src,
- t->bd_index);
+ format_ethernet_address, t->dst,
+ format_ethernet_address, t->src, t->bd_index);
return s;
}
_(L2FWD, "L2 forward packets") \
_(FLOOD, "L2 forward misses") \
_(HIT, "L2 forward hits") \
-_(BVI_TAGGED, "BVI packet with vlan tag") \
+_(BVI_BAD_MAC, "BVI L3 MAC mismatch") \
_(BVI_ETHERTYPE, "BVI packet with unhandled ethertype") \
_(FILTER_DROP, "Filter Mac Drop") \
_(REFLECT_DROP, "Reflection Drop")
-typedef enum {
+typedef enum
+{
#define _(sym,str) L2FWD_ERROR_##sym,
foreach_l2fwd_error
#undef _
- L2FWD_N_ERROR,
+ L2FWD_N_ERROR,
} l2fwd_error_t;
-static char * l2fwd_error_strings[] = {
+static char *l2fwd_error_strings[] = {
#define _(sym,string) string,
foreach_l2fwd_error
#undef _
};
-typedef enum {
+typedef enum
+{
L2FWD_NEXT_L2_OUTPUT,
L2FWD_NEXT_FLOOD,
L2FWD_NEXT_DROP,
L2FWD_N_NEXT,
} l2fwd_next_t;
-// Forward one packet based on the mac table lookup result
+/** Forward one packet based on the mac table lookup result. */
static_always_inline void
l2fwd_process (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- l2fwd_main_t * msm,
- vlib_error_main_t * em,
- vlib_buffer_t * b0,
- u32 sw_if_index0,
- l2fib_entry_result_t * result0,
- u32 * next0)
+ vlib_node_runtime_t * node,
+ l2fwd_main_t * msm,
+ vlib_error_main_t * em,
+ vlib_buffer_t * b0,
+ u32 sw_if_index0, l2fib_entry_result_t * result0, u32 * next0)
{
- if (PREDICT_FALSE (result0->raw == ~0)) {
- // lookup miss, so flood
- // TODO:replicate packet to each intf in bridge-domain
- // For now just drop
- if (vnet_buffer(b0)->l2.feature_bitmap & L2INPUT_FEAT_UU_FLOOD) {
- *next0 = L2FWD_NEXT_FLOOD;
- } else {
- // Flooding is disabled
- b0->error = node->errors[L2FWD_ERROR_FLOOD];
- *next0 = L2FWD_NEXT_DROP;
- }
+ if (PREDICT_FALSE (result0->raw == ~0))
+ {
+ /*
+ * lookup miss, so flood
+ * TODO:replicate packet to each intf in bridge-domain
+ * For now just drop
+ */
+ if (vnet_buffer (b0)->l2.feature_bitmap & L2INPUT_FEAT_UU_FLOOD)
+ {
+ *next0 = L2FWD_NEXT_FLOOD;
+ }
+ else
+ {
+ /* Flooding is disabled */
+ b0->error = node->errors[L2FWD_ERROR_FLOOD];
+ *next0 = L2FWD_NEXT_DROP;
+ }
- } else {
+ }
+ else
+ {
- // lookup hit, forward packet
+ /* lookup hit, forward packet */
#ifdef COUNTERS
- em->counters[node_counter_base_index + L2FWD_ERROR_HIT] += 1;
-#endif
-
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = result0->fields.sw_if_index;
- *next0 = L2FWD_NEXT_L2_OUTPUT;
-
- // perform reflection check
- if (PREDICT_FALSE (sw_if_index0 == result0->fields.sw_if_index)) {
- b0->error = node->errors[L2FWD_ERROR_REFLECT_DROP];
- *next0 = L2FWD_NEXT_DROP;
-
- // perform filter check
- } else if (PREDICT_FALSE (result0->fields.filter)) {
- b0->error = node->errors[L2FWD_ERROR_FILTER_DROP];
- *next0 = L2FWD_NEXT_DROP;
-
- // perform BVI check
- } else if (PREDICT_FALSE (result0->fields.bvi)) {
- u32 rc;
- rc = l2_to_bvi (vm,
- msm->vnet_main,
- b0,
- vnet_buffer(b0)->sw_if_index[VLIB_TX],
- &msm->l3_next,
- next0);
-
- if (PREDICT_FALSE(rc)) {
- if (rc == TO_BVI_ERR_TAGGED) {
- b0->error = node->errors[L2FWD_ERROR_BVI_TAGGED];
- *next0 = L2FWD_NEXT_DROP;
- } else if (rc == TO_BVI_ERR_ETHERTYPE) {
- b0->error = node->errors[L2FWD_ERROR_BVI_ETHERTYPE];
- *next0 = L2FWD_NEXT_DROP;
- }
- }
+ em->counters[node_counter_base_index + L2FWD_ERROR_HIT] += 1;
+#endif
+
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = result0->fields.sw_if_index;
+ *next0 = L2FWD_NEXT_L2_OUTPUT;
+
+ /* perform reflection check */
+ if (PREDICT_FALSE (sw_if_index0 == result0->fields.sw_if_index))
+ {
+ b0->error = node->errors[L2FWD_ERROR_REFLECT_DROP];
+ *next0 = L2FWD_NEXT_DROP;
+
+ /* perform filter check */
+ }
+ else if (PREDICT_FALSE (result0->fields.filter))
+ {
+ b0->error = node->errors[L2FWD_ERROR_FILTER_DROP];
+ *next0 = L2FWD_NEXT_DROP;
+
+ /* perform BVI check */
+ }
+ else if (PREDICT_FALSE (result0->fields.bvi))
+ {
+ u32 rc;
+ rc = l2_to_bvi (vm,
+ msm->vnet_main,
+ b0,
+ vnet_buffer (b0)->sw_if_index[VLIB_TX],
+ &msm->l3_next, next0);
+
+ if (PREDICT_FALSE (rc))
+ {
+ if (rc == TO_BVI_ERR_BAD_MAC)
+ {
+ b0->error = node->errors[L2FWD_ERROR_BVI_BAD_MAC];
+ *next0 = L2FWD_NEXT_DROP;
+ }
+ else if (rc == TO_BVI_ERR_ETHERTYPE)
+ {
+ b0->error = node->errors[L2FWD_ERROR_BVI_ETHERTYPE];
+ *next0 = L2FWD_NEXT_DROP;
+ }
+ }
+ }
}
- }
}
static uword
l2fwd_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- u32 n_left_from, * from, * to_next;
+ u32 n_left_from, *from, *to_next;
l2fwd_next_t next_index;
- l2fwd_main_t * msm = &l2fwd_main;
+ l2fwd_main_t *msm = &l2fwd_main;
vlib_node_t *n = vlib_get_node (vm, l2fwd_node.index);
- CLIB_UNUSED(u32 node_counter_base_index) = n->error_heap_index;
- vlib_error_main_t * em = &vm->error_main;
+ CLIB_UNUSED (u32 node_counter_base_index) = n->error_heap_index;
+ vlib_error_main_t *em = &vm->error_main;
l2fib_entry_key_t cached_key;
l2fib_entry_result_t cached_result;
- // Clear the one-entry cache in case mac table was updated
- cached_key.raw = ~0;
+ /* Clear the one-entry cache in case mac table was updated */
+ cached_key.raw = ~0;
cached_result.raw = ~0;
from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors; /* number of packets to process */
+ n_left_from = frame->n_vectors; /* number of packets to process */
next_index = node->cached_next_index;
while (n_left_from > 0)
u32 n_left_to_next;
/* get space to enqueue frame to graph node "next_index" */
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- ethernet_header_t * h0, * h1;
- l2fib_entry_key_t key0, key1;
- l2fib_entry_result_t result0, result1;
- u32 bucket0, bucket1;
-
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, next1;
+ u32 sw_if_index0, sw_if_index1;
+ ethernet_header_t *h0, *h1;
+ l2fib_entry_key_t key0, key1;
+ l2fib_entry_result_t result0, result1;
+ u32 bucket0, bucket1;
+
/* Prefetch next iteration. */
{
- vlib_buffer_t * p2, * p3;
-
+ vlib_buffer_t *p2, *p3;
+
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
-
+
vlib_prefetch_buffer_header (p2, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
}
- /* speculatively enqueue b0 and b1 to the current next frame */
- /* bi is "buffer index", b is pointer to the buffer */
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ /* bi is "buffer index", b is pointer to the buffer */
to_next[0] = bi0 = from[0];
to_next[1] = bi1 = from[1];
from += 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
-
- /* RX interface handles */
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
-
- h0 = vlib_buffer_get_current (b0);
- h1 = vlib_buffer_get_current (b1);
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)))
- {
- if (b0->flags & VLIB_BUFFER_IS_TRACED)
- {
- l2fwd_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->bd_index = vnet_buffer(b0)->l2.bd_index;
- memcpy(t->src, h0->src_address, 6);
- memcpy(t->dst, h0->dst_address, 6);
- }
- if (b1->flags & VLIB_BUFFER_IS_TRACED)
- {
- l2fwd_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->bd_index = vnet_buffer(b1)->l2.bd_index;
- memcpy(t->src, h1->src_address, 6);
- memcpy(t->dst, h1->dst_address, 6);
- }
- }
-
- /* process 2 pkts */
+
+ /* RX interface handles */
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+ h0 = vlib_buffer_get_current (b0);
+ h1 = vlib_buffer_get_current (b1);
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ l2fwd_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->bd_index = vnet_buffer (b0)->l2.bd_index;
+ clib_memcpy (t->src, h0->src_address, 6);
+ clib_memcpy (t->dst, h0->dst_address, 6);
+ }
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ l2fwd_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->bd_index = vnet_buffer (b1)->l2.bd_index;
+ clib_memcpy (t->src, h1->src_address, 6);
+ clib_memcpy (t->dst, h1->dst_address, 6);
+ }
+ }
+
+ /* process 2 pkts */
#ifdef COUNTERS
- em->counters[node_counter_base_index + L2FWD_ERROR_L2FWD] += 2;
+ em->counters[node_counter_base_index + L2FWD_ERROR_L2FWD] += 2;
#endif
- l2fib_lookup_2 (msm->mac_table, &cached_key, &cached_result,
- h0->dst_address,
- h1->dst_address,
- vnet_buffer(b0)->l2.bd_index,
- vnet_buffer(b1)->l2.bd_index,
- &key0, // not used
- &key1, // not used
- &bucket0, // not used
- &bucket1, // not used
- &result0,
- &result1);
- l2fwd_process (vm, node, msm, em, b0, sw_if_index0, &result0, &next0);
- l2fwd_process (vm, node, msm, em, b1, sw_if_index1, &result1, &next1);
-
- /* verify speculative enqueues, maybe switch current next frame */
- /* if next0==next1==next_index then nothing special needs to be done */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
+ l2fib_lookup_2 (msm->mac_table, &cached_key, &cached_result, h0->dst_address, h1->dst_address, vnet_buffer (b0)->l2.bd_index, vnet_buffer (b1)->l2.bd_index, &key0, /* not used */
+ &key1, /* not used */
+ &bucket0, /* not used */
+ &bucket1, /* not used */
+ &result0, &result1);
+ l2fwd_process (vm, node, msm, em, b0, sw_if_index0, &result0,
+ &next0);
+ l2fwd_process (vm, node, msm, em, b1, sw_if_index1, &result1,
+ &next1);
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ /* if next0==next1==next_index then nothing special needs to be done */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
- ethernet_header_t * h0;
- l2fib_entry_key_t key0;
- l2fib_entry_result_t result0;
- u32 bucket0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ethernet_header_t *h0;
+ l2fib_entry_key_t key0;
+ l2fib_entry_result_t result0;
+ u32 bucket0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
b0 = vlib_get_buffer (vm, bi0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- h0 = vlib_buffer_get_current (b0);
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED))) {
- l2fwd_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->bd_index = vnet_buffer(b0)->l2.bd_index;
- memcpy(t->src, h0->src_address, 6);
- memcpy(t->dst, h0->dst_address, 6);
- }
-
- /* process 1 pkt */
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ h0 = vlib_buffer_get_current (b0);
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ l2fwd_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->bd_index = vnet_buffer (b0)->l2.bd_index;
+ clib_memcpy (t->src, h0->src_address, 6);
+ clib_memcpy (t->dst, h0->dst_address, 6);
+ }
+
+ /* process 1 pkt */
#ifdef COUNTERS
- em->counters[node_counter_base_index + L2FWD_ERROR_L2FWD] += 1;
+ em->counters[node_counter_base_index + L2FWD_ERROR_L2FWD] += 1;
#endif
- l2fib_lookup_1 (msm->mac_table, &cached_key, &cached_result,
- h0->dst_address, vnet_buffer(b0)->l2.bd_index,
- &key0, // not used
- &bucket0, // not used
- &result0);
- l2fwd_process (vm, node, msm, em, b0, sw_if_index0, &result0, &next0);
-
- /* verify speculative enqueue, maybe switch current next frame */
+ l2fib_lookup_1 (msm->mac_table, &cached_key, &cached_result, h0->dst_address, vnet_buffer (b0)->l2.bd_index, &key0, /* not used */
+ &bucket0, /* not used */
+ &result0);
+ l2fwd_process (vm, node, msm, em, b0, sw_if_index0, &result0,
+ &next0);
+
+ /* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
return frame->n_vectors;
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (l2fwd_node,static) = {
.function = l2fwd_node_fn,
.name = "l2-fwd",
.vector_size = sizeof (u32),
.format_trace = format_l2fwd_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
-
+
.n_errors = ARRAY_LEN(l2fwd_error_strings),
.error_strings = l2fwd_error_strings,
[L2FWD_NEXT_DROP] = "error-drop",
},
};
+/* *INDENT-ON* */
-clib_error_t *l2fwd_init (vlib_main_t *vm)
+VLIB_NODE_FUNCTION_MULTIARCH (l2fwd_node, l2fwd_node_fn)
+ clib_error_t *l2fwd_init (vlib_main_t * vm)
{
- l2fwd_main_t * mp = &l2fwd_main;
-
+ l2fwd_main_t *mp = &l2fwd_main;
+
mp->vlib_main = vm;
- mp->vnet_main = vnet_get_main();
+ mp->vnet_main = vnet_get_main ();
/* init the hash table ptr */
- mp->mac_table = get_mac_table();
+ mp->mac_table = get_mac_table ();
- // Initialize the next nodes for each ethertype
+ /* Initialize the next nodes for each ethertype */
next_by_ethertype_init (&mp->l3_next);
return 0;
VLIB_INIT_FUNCTION (l2fwd_init);
-// Add the L3 input node for this ethertype to the next nodes structure
+/** Add the L3 input node for this ethertype to the next nodes structure. */
void
l2fwd_register_input_type (vlib_main_t * vm,
- ethernet_type_t type,
- u32 node_index)
+ ethernet_type_t type, u32 node_index)
{
- l2fwd_main_t * mp = &l2fwd_main;
+ l2fwd_main_t *mp = &l2fwd_main;
u32 next_index;
- next_index = vlib_node_add_next (vm,
- l2fwd_node.index,
- node_index);
+ next_index = vlib_node_add_next (vm, l2fwd_node.index, node_index);
next_by_ethertype_register (&mp->l3_next, type, next_index);
}
-// set subinterface forward enable/disable
-// The CLI format is:
-// set interface l2 forward <interface> [disable]
+/**
+ * Set subinterface forward enable/disable.
+ * The CLI format is:
+ * set interface l2 forward <interface> [disable]
+ */
static clib_error_t *
-int_fwd (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
+int_fwd (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
{
- vnet_main_t * vnm = vnet_get_main();
- clib_error_t * error = 0;
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
u32 sw_if_index;
u32 enable;
- if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
{
error = clib_error_return (0, "unknown interface `%U'",
- format_unformat_error, input);
+ format_unformat_error, input);
goto done;
}
enable = 1;
- if (unformat (input, "disable")) {
- enable = 0;
- }
-
- // set the interface flag
- if (l2input_intf_config(sw_if_index)->xconnect) {
- l2input_intf_bitmap_enable(sw_if_index, L2INPUT_FEAT_XCONNECT, enable);
- } else {
- l2input_intf_bitmap_enable(sw_if_index, L2INPUT_FEAT_FWD, enable);
- }
-
- done:
+ if (unformat (input, "disable"))
+ {
+ enable = 0;
+ }
+
+ /* set the interface flag */
+ if (l2input_intf_config (sw_if_index)->xconnect)
+ {
+ l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_XCONNECT, enable);
+ }
+ else
+ {
+ l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_FWD, enable);
+ }
+
+done:
return error;
}
+/*?
+ * Layer 2 unicast forwarding can be enabled and disabled on each
+ * interface and on each bridge-domain. Use this command to
+ * manage interfaces. It is enabled by default.
+ *
+ * @cliexpar
+ * Example of how to enable fowarding:
+ * @cliexcmd{set interface l2 forward GigabitEthernet0/8/0}
+ * Example of how to disable fowarding:
+ * @cliexcmd{set interface l2 forward GigabitEthernet0/8/0 disable}
+?*/
+/* *INDENT-OFF* */
VLIB_CLI_COMMAND (int_fwd_cli, static) = {
.path = "set interface l2 forward",
.short_help = "set interface l2 forward <interface> [disable]",
.function = int_fwd,
};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff