*/
#include <vlib/vlib.h>
-#include <vnet/pg/pg.h>
#include <vnet/ip/ip.h>
#include <vnet/mpls/mpls.h>
+#include <vnet/ip/ip_frag.h>
+#include <vnet/adj/adj_dp.h>
typedef struct {
/* Adjacency taken. */
u32 adj_index;
u32 flow_hash;
-
- /* Packet data, possibly *after* rewrite. */
- u8 packet_data[64 - 1*sizeof(u32)];
} mpls_output_trace_t;
+typedef enum {
+ MPLS_OUTPUT_MODE,
+ MPLS_OUTPUT_MIDCHAIN_MODE
+}mpls_output_mode_t;
+
+#define foreach_mpls_output_next \
+_(DROP, "error-drop") \
+_(FRAG, "mpls-frag")
+
+typedef enum {
+#define _(s,n) MPLS_OUTPUT_NEXT_##s,
+ foreach_mpls_output_next
+#undef _
+ MPLS_OUTPUT_N_NEXT,
+} mpls_output_next_t;
+
static u8 *
format_mpls_output_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 *);
mpls_output_trace_t * t = va_arg (*args, mpls_output_trace_t *);
- uword indent = format_get_indent (s);
s = format (s, "adj-idx %d : %U flow hash: 0x%08x",
t->adj_index,
format_ip_adjacency, t->adj_index, FORMAT_IP_ADJACENCY_NONE,
t->flow_hash);
- s = format (s, "\n%U%U",
- format_white_space, indent,
- format_ip_adjacency_packet_data,
- t->adj_index, t->packet_data, sizeof (t->packet_data));
return s;
}
mpls_output_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame,
- int is_midchain)
+ mpls_output_mode_t mode)
{
- u32 n_left_from, next_index, * from, * to_next, cpu_index;
+ u32 n_left_from, next_index, * from, * to_next, thread_index;
vlib_node_runtime_t * error_node;
u32 n_left_to_next;
mpls_main_t *mm;
- cpu_index = os_get_cpu_number();
+ thread_index = vlib_get_thread_index();
error_node = vlib_node_get_runtime (vm, mpls_output_node.index);
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
ip_adjacency_t * adj0;
mpls_unicast_header_t *hdr0;
vlib_buffer_t * p0;
- u32 pi0, rw_len0, adj_index0, next0, error0;
+ u32 pi0, adj_index0, next0, error0;
+ word rw_len0;
ip_adjacency_t * adj1;
mpls_unicast_header_t *hdr1;
vlib_buffer_t * p1;
- u32 pi1, rw_len1, adj_index1, next1, error1;
+ u32 pi1, adj_index1, next1, error1;
+ word rw_len1;
/* Prefetch next iteration. */
{
adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
- /* We should never rewrite a pkt using the MISS adjacency */
- ASSERT(adj_index0);
- ASSERT(adj_index1);
-
adj0 = adj_get(adj_index0);
adj1 = adj_get(adj_index1);
hdr0 = vlib_buffer_get_current (p0);
/* Update packet buffer attributes/set output interface. */
rw_len0 = adj0[0].rewrite_header.data_bytes;
rw_len1 = adj1[0].rewrite_header.data_bytes;
+ vnet_buffer (p0)->mpls.save_rewrite_length = rw_len0;
+ vnet_buffer (p1)->mpls.save_rewrite_length = rw_len1;
/* Bump the adj counters for packet and bytes */
vlib_increment_combined_counter
(&adjacency_counters,
- cpu_index,
+ thread_index,
adj_index0,
1,
vlib_buffer_length_in_chain (vm, p0) + rw_len0);
vlib_increment_combined_counter
(&adjacency_counters,
- cpu_index,
+ thread_index,
adj_index1,
1,
vlib_buffer_length_in_chain (vm, p1) + rw_len1);
if (PREDICT_TRUE(vlib_buffer_length_in_chain (vm, p0) <=
adj0[0].rewrite_header.max_l3_packet_bytes))
{
- p0->current_data -= rw_len0;
- p0->current_length += rw_len0;
+ vlib_buffer_advance(p0, -rw_len0);
vnet_buffer (p0)->sw_if_index[VLIB_TX] =
adj0[0].rewrite_header.sw_if_index;
}
else
{
- error0 = IP4_ERROR_MTU_EXCEEDED;
- next0 = MPLS_OUTPUT_NEXT_DROP;
+ error0 = IP4_ERROR_MTU_EXCEEDED;
+ next0 = MPLS_OUTPUT_NEXT_FRAG;
+ vlib_node_increment_counter (vm, mpls_output_node.index,
+ MPLS_ERROR_PKTS_NEED_FRAG,
+ 1);
}
if (PREDICT_TRUE(vlib_buffer_length_in_chain (vm, p1) <=
adj1[0].rewrite_header.max_l3_packet_bytes))
{
- p1->current_data -= rw_len1;
- p1->current_length += rw_len1;
+ vlib_buffer_advance(p1, -rw_len1);
vnet_buffer (p1)->sw_if_index[VLIB_TX] =
adj1[0].rewrite_header.sw_if_index;
}
else
{
- error1 = IP4_ERROR_MTU_EXCEEDED;
- next1 = MPLS_OUTPUT_NEXT_DROP;
+ error1 = IP4_ERROR_MTU_EXCEEDED;
+ next1 = MPLS_OUTPUT_NEXT_FRAG;
+ vlib_node_increment_counter (vm, mpls_output_node.index,
+ MPLS_ERROR_PKTS_NEED_FRAG,
+ 1);
}
- if (is_midchain)
+ if (mode == MPLS_OUTPUT_MIDCHAIN_MODE)
{
- adj0->sub_type.midchain.fixup_func(vm, adj0, p0);
- adj1->sub_type.midchain.fixup_func(vm, adj1, p1);
- }
-
- p0->error = error_node->errors[error0];
- p1->error = error_node->errors[error1];
-
- if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
- {
- mpls_output_trace_t *tr = vlib_add_trace (vm, node,
- p0, sizeof (*tr));
- tr->adj_index = vnet_buffer(p0)->ip.adj_index[VLIB_TX];
- tr->flow_hash = vnet_buffer(p0)->ip.flow_hash;
- }
- if (PREDICT_FALSE(p1->flags & VLIB_BUFFER_IS_TRACED))
- {
- mpls_output_trace_t *tr = vlib_add_trace (vm, node,
- p1, sizeof (*tr));
- tr->adj_index = vnet_buffer(p1)->ip.adj_index[VLIB_TX];
- tr->flow_hash = vnet_buffer(p1)->ip.flow_hash;
- }
+ adj_midchain_fixup (vm, adj0, p0, VNET_LINK_MPLS);
+ adj_midchain_fixup (vm, adj1, p1, VNET_LINK_MPLS);
+ }
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, pi1, next0, next1);
- }
+ p0->error = error_node->errors[error0];
+ p1->error = error_node->errors[error1];
+
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_output_trace_t *tr =
+ vlib_add_trace (vm, node, p0, sizeof (*tr));
+ tr->adj_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
+ tr->flow_hash = vnet_buffer (p0)->ip.flow_hash;
+ }
+ if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_output_trace_t *tr =
+ vlib_add_trace (vm, node, p1, sizeof (*tr));
+ tr->adj_index = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
+ tr->flow_hash = vnet_buffer (p1)->ip.flow_hash;
+ }
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, pi1, next0,
+ next1);
+ }
while (n_left_from > 0 && n_left_to_next > 0)
{
ip_adjacency_t * adj0;
- mpls_unicast_header_t *hdr0;
+ mpls_unicast_header_t *hdr0;
vlib_buffer_t * p0;
- u32 pi0, rw_len0, adj_index0, next0, error0;
+ u32 pi0, adj_index0, next0, error0;
+ word rw_len0;
pi0 = to_next[0] = from[0];
adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
- /* We should never rewrite a pkt using the MISS adjacency */
- ASSERT(adj_index0);
-
adj0 = adj_get(adj_index0);
- hdr0 = vlib_buffer_get_current (p0);
+ hdr0 = vlib_buffer_get_current (p0);
/* Guess we are only writing on simple Ethernet header. */
- vnet_rewrite_one_header (adj0[0], hdr0,
+ vnet_rewrite_one_header (adj0[0], hdr0,
sizeof (ethernet_header_t));
-
+
/* Update packet buffer attributes/set output interface. */
rw_len0 = adj0[0].rewrite_header.data_bytes;
-
+ vnet_buffer (p0)->mpls.save_rewrite_length = rw_len0;
+
vlib_increment_combined_counter
(&adjacency_counters,
- cpu_index,
+ thread_index,
adj_index0,
1,
vlib_buffer_length_in_chain (vm, p0) + rw_len0);
-
+
/* Check MTU of outgoing interface. */
if (PREDICT_TRUE(vlib_buffer_length_in_chain (vm, p0) <=
adj0[0].rewrite_header.max_l3_packet_bytes))
{
- p0->current_data -= rw_len0;
- p0->current_length += rw_len0;
+ vlib_buffer_advance(p0, -rw_len0);
vnet_buffer (p0)->sw_if_index[VLIB_TX] =
adj0[0].rewrite_header.sw_if_index;
}
else
{
- error0 = IP4_ERROR_MTU_EXCEEDED;
- next0 = MPLS_OUTPUT_NEXT_DROP;
+ error0 = IP4_ERROR_MTU_EXCEEDED;
+ next0 = MPLS_OUTPUT_NEXT_FRAG;
+ vlib_node_increment_counter (vm, mpls_output_node.index,
+ MPLS_ERROR_PKTS_NEED_FRAG,
+ 1);
}
- if (is_midchain)
+ if (mode == MPLS_OUTPUT_MIDCHAIN_MODE)
{
- adj0->sub_type.midchain.fixup_func(vm, adj0, p0);
- }
+ adj_midchain_fixup (vm, adj0, p0, VNET_LINK_MPLS);
+ }
- p0->error = error_node->errors[error0];
+ p0->error = error_node->errors[error0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
-
- if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
+
+ if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
{
- mpls_output_trace_t *tr = vlib_add_trace (vm, node,
+ mpls_output_trace_t *tr = vlib_add_trace (vm, node,
p0, sizeof (*tr));
tr->adj_index = vnet_buffer(p0)->ip.adj_index[VLIB_TX];
tr->flow_hash = vnet_buffer(p0)->ip.flow_hash;
#undef mpls_error
};
-static inline uword
-mpls_output (vlib_main_t * vm,
+VLIB_NODE_FN (mpls_output_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return (mpls_output_inline(vm, node, from_frame, /* is_midchain */ 0));
+ return (mpls_output_inline(vm, node, from_frame, MPLS_OUTPUT_MODE));
}
VLIB_REGISTER_NODE (mpls_output_node) = {
- .function = mpls_output,
.name = "mpls-output",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_next_nodes = MPLS_OUTPUT_N_NEXT,
.next_nodes = {
-#define _(s,n) [MPLS_OUTPUT_NEXT_##s] = n,
- foreach_mpls_output_next
-#undef _
- },
-
+ [MPLS_OUTPUT_NEXT_DROP] = "mpls-drop",
+ [MPLS_OUTPUT_NEXT_FRAG] = "mpls-frag",
+ },
.format_trace = format_mpls_output_trace,
};
-VLIB_NODE_FUNCTION_MULTIARCH (mpls_output_node, mpls_output)
-
-static inline uword
-mpls_midchain (vlib_main_t * vm,
+VLIB_NODE_FN (mpls_midchain_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return (mpls_output_inline(vm, node, from_frame, /* is_midchain */ 1));
+ return (mpls_output_inline(vm, node, from_frame, MPLS_OUTPUT_MIDCHAIN_MODE));
}
VLIB_REGISTER_NODE (mpls_midchain_node) = {
- .function = mpls_midchain,
.name = "mpls-midchain",
.vector_size = sizeof (u32),
- .format_trace = format_mpls_output_trace,
+ .n_errors = MPLS_N_ERROR,
+ .error_strings = mpls_error_strings,
.sibling_of = "mpls-output",
+ .format_trace = format_mpls_output_trace,
};
-VLIB_NODE_FUNCTION_MULTIARCH (mpls_midchain_node, mpls_midchain)
+static char *mpls_frag_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ip_frag_error
+#undef _
+};
-/**
+typedef struct mpls_frag_trace_t_
+{
+ u16 pkt_size;
+ u16 mtu;
+} mpls_frag_trace_t;
+
+typedef enum
+{
+ MPLS_FRAG_NEXT_REWRITE,
+ MPLS_FRAG_NEXT_REWRITE_MIDCHAIN,
+ MPLS_FRAG_NEXT_ICMP_ERROR,
+ MPLS_FRAG_NEXT_DROP,
+ MPLS_FRAG_N_NEXT,
+} mpls_frag_next_t;
+
+static uword
+mpls_frag (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, next_index, * from, * to_next, n_left_to_next, *frags;
+ vlib_node_runtime_t * error_node;
+
+ error_node = vlib_node_get_runtime (vm, mpls_output_node.index);
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+ frags = NULL;
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ ip_adjacency_t * adj0;
+ vlib_buffer_t * p0;
+ mpls_frag_next_t next0;
+ u32 pi0, adj_index0;
+ ip_frag_error_t error0 = IP_FRAG_ERROR_NONE;
+ i16 encap_size;
+ u8 is_ip4;
+
+ pi0 = to_next[0] = from[0];
+ p0 = vlib_get_buffer (vm, pi0);
+ from += 1;
+ n_left_from -= 1;
+ is_ip4 = vnet_buffer (p0)->mpls.pyld_proto == DPO_PROTO_IP4;
+
+ adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
+ adj0 = adj_get(adj_index0);
+
+ /* the size of the MPLS stack */
+ encap_size = vnet_buffer(p0)->l3_hdr_offset - p0->current_data;
+
+ /* IP fragmentation */
+ if (is_ip4)
+ error0 = ip4_frag_do_fragment (vm, pi0,
+ adj0->rewrite_header.max_l3_packet_bytes,
+ encap_size, &frags);
+ else
+ error0 = ip6_frag_do_fragment (vm, pi0,
+ adj0->rewrite_header.max_l3_packet_bytes,
+ encap_size, &frags);
+
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_frag_trace_t *tr =
+ vlib_add_trace (vm, node, p0, sizeof (*tr));
+ tr->mtu = adj0->rewrite_header.max_l3_packet_bytes;
+ tr->pkt_size = vlib_buffer_length_in_chain(vm, p0);
+ }
+
+ if (PREDICT_TRUE(error0 == IP_FRAG_ERROR_NONE))
+ {
+ /* Free original buffer chain */
+ vlib_buffer_free_one (vm, pi0); /* Free original packet */
+ next0 = (IP_LOOKUP_NEXT_MIDCHAIN == adj0->lookup_next_index ?
+ MPLS_FRAG_NEXT_REWRITE_MIDCHAIN :
+ MPLS_FRAG_NEXT_REWRITE);
+ }
+ else if (is_ip4 && error0 == IP_FRAG_ERROR_DONT_FRAGMENT_SET)
+ {
+ icmp4_error_set_vnet_buffer (
+ p0, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
+ vnet_buffer (p0)->ip_frag.mtu);
+ next0 = MPLS_FRAG_NEXT_ICMP_ERROR;
+ }
+ else
+ {
+ vlib_error_count (vm, mpls_output_node.index, error0, 1);
+ vec_add1 (frags, pi0); /* Get rid of the original buffer */
+ next0 = MPLS_FRAG_NEXT_DROP;
+ }
+
+ /* Send fragments that were added in the frame */
+ u32 *frag_from, frag_left;
+
+ frag_from = frags;
+ frag_left = vec_len (frags);
+
+ while (frag_left > 0)
+ {
+ while (frag_left > 0 && n_left_to_next > 0)
+ {
+ u32 i;
+ i = to_next[0] = frag_from[0];
+ frag_from += 1;
+ frag_left -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, i);
+ p0->error = error_node->errors[error0];
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next, i,
+ next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next,
+ n_left_to_next);
+ }
+ vec_reset_length (frags);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ vec_free (frags);
+
+ return frame->n_vectors;
+}
+
+static u8 *
+format_mpls_frag_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 *);
+ mpls_frag_trace_t *t = va_arg (*args, mpls_frag_trace_t *);
+
+ s = format (s, "mtu:%d pkt-size:%d", t->mtu, t->pkt_size);
+ return s;
+}
+
+VLIB_REGISTER_NODE (mpls_frag_node) = {
+ .function = mpls_frag,
+ .name = "mpls-frag",
+ .vector_size = sizeof (u32),
+ .format_trace = format_mpls_frag_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = IP_FRAG_N_ERROR,
+ .error_strings = mpls_frag_error_strings,
+
+ .n_next_nodes = MPLS_FRAG_N_NEXT,
+ .next_nodes = {
+ [MPLS_FRAG_NEXT_REWRITE] = "mpls-output",
+ [MPLS_FRAG_NEXT_REWRITE_MIDCHAIN] = "mpls-midchain",
+ [MPLS_FRAG_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [MPLS_FRAG_NEXT_DROP] = "mpls-drop"
+ },
+};
+
+/*
* @brief Next index values from the MPLS incomplete adj node
*/
#define foreach_mpls_adj_incomplete_next \
* We pay a cost for this 'routing' node, but an incomplete adj is the
* exception case.
*/
-static inline uword
-mpls_adj_incomplete (vlib_main_t * vm,
+VLIB_NODE_FN (mpls_adj_incomplete_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
n_left_to_next -= 1;
adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
- ASSERT(adj_index0);
adj0 = adj_get(adj_index0);
else
{
next0 = MPLS_ADJ_INCOMPLETE_NEXT_IP6;
- }
+ }
- if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
+ if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
{
mpls_adj_incomplete_trace_t *tr =
vlib_add_trace (vm, node, p0, sizeof (*tr));
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
mpls_adj_incomplete_trace_t * t;
- uword indent;
+ u32 indent;
t = va_arg (*args, mpls_adj_incomplete_trace_t *);
indent = format_get_indent (s);
}
VLIB_REGISTER_NODE (mpls_adj_incomplete_node) = {
- .function = mpls_adj_incomplete,
.name = "mpls-adj-incomplete",
.format_trace = format_mpls_adj_incomplete_trace,
/* Takes a vector of packets. */
#undef _
},
};
-
-VLIB_NODE_FUNCTION_MULTIARCH (mpls_adj_incomplete_node,
- mpls_adj_incomplete)
Code Review / vpp.git / blobdiff