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authorBenoît Ganne <bganne@cisco.com>2019-02-14 15:32:45 +0100
committerFlorin Coras <florin.coras@gmail.com>2019-02-15 20:22:13 +0000
commit26a101976d6213a01417aa99b35180a79100028b (patch)
treec366653d6da5080612e943dc7b2cf945c95934a2 /src
parentbb65ba10fd32dbd22d7681a6573292a9afe491a3 (diff)
Optimize ip6-local
Optimize IPv6 ip6-local node by rewriting the dual/single loop with prefetch and simpler unrolling. My local, unrepresentative tests for GRE4 termination over IPv6 show a performance improvement of ~40% for ip6-local node alone and ~5% globally. Change-Id: I11e1e86d3838dd3c081aa6be5e25dae16ed6e2d8 Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src')
-rw-r--r--src/vnet/ip/ip6_forward.c433
1 files changed, 187 insertions, 246 deletions
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 2c3879b13d1..a7886e630bf 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -1093,316 +1093,257 @@ VNET_FEATURE_ARC_INIT (ip6_local) =
};
/* *INDENT-ON* */
-static uword
+always_inline uword
ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, int head_of_feature_arc)
{
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
- ip_local_next_t next_index;
- u32 *from, *to_next, n_left_from, n_left_to_next;
+ u32 *from, n_left_from;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_input_node.index);
u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u16 nexts[VLIB_FRAME_SIZE], *next;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip6_forward_next_trace (vm, node, frame, VLIB_TX);
- while (n_left_from > 0)
- {
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- vlib_buffer_t *p0, *p1;
- ip6_header_t *ip0, *ip1;
- udp_header_t *udp0, *udp1;
- u32 pi0, ip_len0, udp_len0, flags0, next0;
- u32 pi1, ip_len1, udp_len1, flags1, next1;
- i32 len_diff0, len_diff1;
- u8 error0, type0, good_l4_csum0, is_tcp_udp0;
- u8 error1, type1, good_l4_csum1, is_tcp_udp1;
- u32 udp_offset0, udp_offset1;
-
- pi0 = to_next[0] = from[0];
- pi1 = to_next[1] = from[1];
- from += 2;
- n_left_from -= 2;
- to_next += 2;
- n_left_to_next -= 2;
-
- error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
-
- p0 = vlib_get_buffer (vm, pi0);
- p1 = vlib_get_buffer (vm, pi1);
-
- ip0 = vlib_buffer_get_current (p0);
- ip1 = vlib_buffer_get_current (p1);
-
- if (head_of_feature_arc == 0)
- goto skip_checks;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ b = bufs;
+ next = nexts;
- vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
- vnet_buffer (p1)->l3_hdr_offset = p1->current_data;
+#define N 2
+#define xN for (int n=0; n<N; n++)
- type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
- type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];
-
- flags0 = p0->flags;
- flags1 = p1->flags;
+ while (n_left_from > N)
+ {
+ /* Prefetch next iteration. */
+ if (n_left_from >= 3 * N)
+ {
+ xN vlib_prefetch_buffer_header (b[2 * N + n], STORE);
+ xN vlib_prefetch_buffer_data (b[1 * N + n], LOAD);
+ }
- is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
- is_tcp_udp1 = ip6_next_proto_is_tcp_udp (p1, ip1, &udp_offset1);
+ u8 error[N];
+ xN error[n] = IP6_ERROR_UNKNOWN_PROTOCOL;
- good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
- || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
- || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
- != 0;
- good_l4_csum1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
- || (flags1 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
- || flags1 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
- != 0;
- len_diff0 = 0;
- len_diff1 = 0;
+ ip6_header_t *ip[N];
+ xN ip[n] = vlib_buffer_get_current (b[n]);
- if (PREDICT_TRUE (is_tcp_udp0))
- {
- udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
- /* Don't verify UDP checksum for packets with explicit zero checksum. */
- good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
- && udp0->checksum == 0;
- /* Verify UDP length. */
- if (is_tcp_udp0 == IP_PROTOCOL_UDP)
- {
- ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
- udp_len0 = clib_net_to_host_u16 (udp0->length);
- len_diff0 = ip_len0 - udp_len0;
- }
- }
- if (PREDICT_TRUE (is_tcp_udp1))
+ if (head_of_feature_arc)
+ {
+ xN vnet_buffer (b[n])->l3_hdr_offset = b[n]->current_data;
+
+ u8 type[N];
+ xN type[n] = lm->builtin_protocol_by_ip_protocol[ip[n]->protocol];
+
+ u32 flags[N];
+ xN flags[n] = b[n]->flags;
+
+ u32 good_l4_csum[N];
+ xN good_l4_csum[n] =
+ flags[n] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
+ VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
+ VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
+
+ u32 udp_offset[N];
+ u8 is_tcp_udp[N];
+ xN is_tcp_udp[n] =
+ ip6_next_proto_is_tcp_udp (b[n], ip[n], &udp_offset[n]);
+ i16 len_diff[N] = { 0 };
+ xN if (PREDICT_TRUE (is_tcp_udp[n]))
{
- udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
- /* Don't verify UDP checksum for packets with explicit zero checksum. */
- good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
- && udp1->checksum == 0;
- /* Verify UDP length. */
- if (is_tcp_udp1 == IP_PROTOCOL_UDP)
- {
- ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
- udp_len1 = clib_net_to_host_u16 (udp1->length);
- len_diff1 = ip_len1 - udp_len1;
- }
+ udp_header_t *udp =
+ (udp_header_t *) ((u8 *) ip[n] + udp_offset[n]);
+ good_l4_csum[n] |= type[n] == IP_BUILTIN_PROTOCOL_UDP
+ && udp->checksum == 0;
+ /* optimistically verify UDP length. */
+ u16 ip_len, udp_len;
+ ip_len = clib_net_to_host_u16 (ip[n]->payload_length);
+ udp_len = clib_net_to_host_u16 (udp->length);
+ len_diff[n] = ip_len - udp_len;
}
- good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
- good_l4_csum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;
+ xN good_l4_csum[n] |= type[n] == IP_BUILTIN_PROTOCOL_UNKNOWN;
+ xN len_diff[n] =
+ type[n] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[n] : 0;
- len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
- len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;
-
- if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
- && !good_l4_csum0
- && !(flags0 &
- VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
- {
- flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
- good_l4_csum0 =
- (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
- }
- if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
- && !good_l4_csum1
- && !(flags1 &
- VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
+ u8 need_csum[N];
+ xN need_csum[n] = type[n] != IP_BUILTIN_PROTOCOL_UNKNOWN
+ && !good_l4_csum[n]
+ && !(flags[n] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
+ xN if (PREDICT_FALSE (need_csum[n]))
{
- flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
- good_l4_csum1 =
- (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ flags[n] = ip6_tcp_udp_icmp_validate_checksum (vm, b[n]);
+ good_l4_csum[n] = flags[n] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
}
- error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;
- error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
- error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;
+ xN error[n] = IP6_ERROR_UNKNOWN_PROTOCOL;
+ xN error[n] = len_diff[n] < 0 ? IP6_ERROR_UDP_LENGTH : error[n];
- ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
- IP6_ERROR_UDP_CHECKSUM);
- ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
- IP6_ERROR_ICMP_CHECKSUM);
- error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
- error1 = (!good_l4_csum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);
+ STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
+ IP6_ERROR_UDP_CHECKSUM,
+ "Wrong IP6 errors constants");
+ STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
+ IP6_ERROR_ICMP_CHECKSUM,
+ "Wrong IP6 errors constants");
+
+ xN error[n] =
+ !good_l4_csum[n] ? IP6_ERROR_UDP_CHECKSUM + type[n] : error[n];
/* Drop packets from unroutable hosts. */
/* If this is a neighbor solicitation (ICMP), skip source RPF check */
- if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
- type0 != IP_BUILTIN_PROTOCOL_ICMP &&
- !ip6_address_is_link_local_unicast (&ip0->src_address))
+ u8 unroutable[N];
+ xN unroutable[n] = error[n] == IP6_ERROR_UNKNOWN_PROTOCOL
+ && type[n] != IP_BUILTIN_PROTOCOL_ICMP
+ && !ip6_address_is_link_local_unicast (&ip[n]->src_address);
+ xN if (PREDICT_FALSE (unroutable[n]))
{
- error0 = (!ip6_urpf_loose_check (im, p0, ip0)
- ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
+ error[n] =
+ !ip6_urpf_loose_check (im, b[n],
+ ip[n]) ? IP6_ERROR_SRC_LOOKUP_MISS
+ : error[n];
}
- if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
- type1 != IP_BUILTIN_PROTOCOL_ICMP &&
- !ip6_address_is_link_local_unicast (&ip1->src_address))
- {
- error1 = (!ip6_urpf_loose_check (im, p1, ip1)
- ? IP6_ERROR_SRC_LOOKUP_MISS : error1);
- }
-
- vnet_buffer (p0)->ip.fib_index =
- vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
- vnet_buffer (p0)->sw_if_index[VLIB_TX] :
- vnet_buffer (p0)->ip.fib_index;
-
- vnet_buffer (p1)->ip.fib_index =
- vnet_buffer (p1)->sw_if_index[VLIB_TX] != ~0 ?
- vnet_buffer (p1)->sw_if_index[VLIB_TX] :
- vnet_buffer (p1)->ip.fib_index;
- skip_checks:
+ xN vnet_buffer (b[n])->ip.fib_index =
+ vnet_buffer (b[n])->sw_if_index[VLIB_TX] != ~0 ?
+ vnet_buffer (b[n])->sw_if_index[VLIB_TX] :
+ vnet_buffer (b[n])->ip.fib_index;
+ } /* head_of_feature_arc */
- next0 = lm->local_next_by_ip_protocol[ip0->protocol];
- next1 = lm->local_next_by_ip_protocol[ip1->protocol];
+ xN next[n] = lm->local_next_by_ip_protocol[ip[n]->protocol];
+ xN next[n] =
+ error[n] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[n];
- next0 =
- error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
- next1 =
- error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;
+ xN b[n]->error = error_node->errors[n];
- p0->error = error_node->errors[error0];
- p1->error = error_node->errors[error1];
-
- if (head_of_feature_arc)
+ if (head_of_feature_arc)
+ {
+ u8 ip6_unknown[N];
+ xN ip6_unknown[n] = error[n] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
+ xN if (PREDICT_TRUE (ip6_unknown[n]))
{
- if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
- vnet_feature_arc_start (arc_index,
- vnet_buffer (p0)->sw_if_index
- [VLIB_RX], &next0, p0);
- if (PREDICT_TRUE (error1 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
- vnet_feature_arc_start (arc_index,
- vnet_buffer (p1)->sw_if_index
- [VLIB_RX], &next1, p1);
+ u32 next32 = next[n];
+ vnet_feature_arc_start (arc_index,
+ vnet_buffer (b[n])->sw_if_index
+ [VLIB_RX], &next32, b[n]);
+ next[n] = next32;
}
-
- 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)
- {
- vlib_buffer_t *p0;
- ip6_header_t *ip0;
- udp_header_t *udp0;
- u32 pi0, ip_len0, udp_len0, flags0, next0;
- i32 len_diff0;
- u8 error0, type0, good_l4_csum0;
- u32 udp_offset0;
- u8 is_tcp_udp0;
-
- pi0 = to_next[0] = from[0];
- from += 1;
- n_left_from -= 1;
- to_next += 1;
- n_left_to_next -= 1;
-
- error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
-
- p0 = vlib_get_buffer (vm, pi0);
- ip0 = vlib_buffer_get_current (p0);
-
- if (head_of_feature_arc == 0)
- goto skip_check;
-
- vnet_buffer (p0)->l3_hdr_offset = p0->current_data;
+ /* next */
+ b += N;
+ next += N;
+ n_left_from -= N;
+ }
+#undef xN
+#undef N
+ while (n_left_from)
+ {
+ u8 error;
+ error = IP6_ERROR_UNKNOWN_PROTOCOL;
- type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
- flags0 = p0->flags;
- is_tcp_udp0 = ip6_next_proto_is_tcp_udp (p0, ip0, &udp_offset0);
- good_l4_csum0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT
- || (flags0 & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
- || flags0 & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
- != 0;
+ ip6_header_t *ip;
+ ip = vlib_buffer_get_current (b[0]);
- len_diff0 = 0;
- if (PREDICT_TRUE (is_tcp_udp0))
+ if (head_of_feature_arc)
+ {
+ vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
+ u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
+
+ u32 flags = b[0]->flags;
+ u32 good_l4_csum =
+ flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
+ VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
+ VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
+
+ u32 udp_offset;
+ i16 len_diff = 0;
+ u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
+ if (PREDICT_TRUE (is_tcp_udp))
{
- udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
- /* Don't verify UDP checksum for packets with explicit zero
- * checksum. */
- good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
- && udp0->checksum == 0;
- /* Verify UDP length. */
- if (is_tcp_udp0 == IP_PROTOCOL_UDP)
- {
- ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
- udp_len0 = clib_net_to_host_u16 (udp0->length);
- len_diff0 = ip_len0 - udp_len0;
- }
+ udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
+ && udp->checksum == 0;
+ /* optimistically verify UDP length. */
+ u16 ip_len, udp_len;
+ ip_len = clib_net_to_host_u16 (ip->payload_length);
+ udp_len = clib_net_to_host_u16 (udp->length);
+ len_diff = ip_len - udp_len;
}
- good_l4_csum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
- len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
+ good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
+ len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
- if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
- && !good_l4_csum0
- && !(flags0 &
- VNET_BUFFER_F_L4_CHECKSUM_COMPUTED)))
+ u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
+ && !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
+ if (PREDICT_FALSE (need_csum))
{
- flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
- good_l4_csum0 =
- (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
+ good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
}
- error0 = IP6_ERROR_UNKNOWN_PROTOCOL;
- error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
+ error = IP6_ERROR_UNKNOWN_PROTOCOL;
+ error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
+
+ STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
+ IP6_ERROR_UDP_CHECKSUM,
+ "Wrong IP6 errors constants");
+ STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
+ IP6_ERROR_ICMP_CHECKSUM,
+ "Wrong IP6 errors constants");
- ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
- IP6_ERROR_UDP_CHECKSUM);
- ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
- IP6_ERROR_ICMP_CHECKSUM);
- error0 = (!good_l4_csum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
+ error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
- /* If this is a neighbor solicitation (ICMP), skip src RPF check */
- if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
- type0 != IP_BUILTIN_PROTOCOL_ICMP &&
- !ip6_address_is_link_local_unicast (&ip0->src_address))
+ /* Drop packets from unroutable hosts. */
+ /* If this is a neighbor solicitation (ICMP), skip source RPF check */
+ u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
+ && type != IP_BUILTIN_PROTOCOL_ICMP
+ && !ip6_address_is_link_local_unicast (&ip->src_address);
+ if (PREDICT_FALSE (unroutable))
{
- error0 = (!ip6_urpf_loose_check (im, p0, ip0)
- ? IP6_ERROR_SRC_LOOKUP_MISS : error0);
+ error =
+ !ip6_urpf_loose_check (im, b[0],
+ ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
+ error;
}
- vnet_buffer (p0)->ip.fib_index =
- vnet_buffer (p0)->sw_if_index[VLIB_TX] != ~0 ?
- vnet_buffer (p0)->sw_if_index[VLIB_TX] :
- vnet_buffer (p0)->ip.fib_index;
+ vnet_buffer (b[0])->ip.fib_index =
+ vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
+ vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
+ vnet_buffer (b[0])->ip.fib_index;
+ } /* head_of_feature_arc */
- skip_check:
+ next[0] = lm->local_next_by_ip_protocol[ip->protocol];
+ next[0] =
+ error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
- next0 = lm->local_next_by_ip_protocol[ip0->protocol];
- next0 =
- error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
+ b[0]->error = error_node->errors[0];
- p0->error = error_node->errors[error0];
-
- if (head_of_feature_arc)
+ if (head_of_feature_arc)
+ {
+ if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
{
- if (PREDICT_TRUE (error0 == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
- vnet_feature_arc_start (arc_index,
- vnet_buffer (p0)->sw_if_index
- [VLIB_RX], &next0, p0);
+ u32 next32 = next[0];
+ vnet_feature_arc_start (arc_index,
+ vnet_buffer (b[0])->sw_if_index
+ [VLIB_RX], &next32, b[0]);
+ next[0] = next32;
}
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, next0);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ /* next */
+ b += 1;
+ next += 1;
+ n_left_from -= 1;
}
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
return frame->n_vectors;
}