From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vnet/dpo/mpls_label_dpo.c | 570 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 570 insertions(+) create mode 100644 src/vnet/dpo/mpls_label_dpo.c (limited to 'src/vnet/dpo/mpls_label_dpo.c') diff --git a/src/vnet/dpo/mpls_label_dpo.c b/src/vnet/dpo/mpls_label_dpo.c new file mode 100644 index 00000000..bbdc9666 --- /dev/null +++ b/src/vnet/dpo/mpls_label_dpo.c @@ -0,0 +1,570 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include +#include +#include + +/* + * pool of all MPLS Label DPOs + */ +mpls_label_dpo_t *mpls_label_dpo_pool; + +static mpls_label_dpo_t * +mpls_label_dpo_alloc (void) +{ + mpls_label_dpo_t *mld; + + pool_get_aligned(mpls_label_dpo_pool, mld, CLIB_CACHE_LINE_BYTES); + memset(mld, 0, sizeof(*mld)); + + dpo_reset(&mld->mld_dpo); + + return (mld); +} + +static index_t +mpls_label_dpo_get_index (mpls_label_dpo_t *mld) +{ + return (mld - mpls_label_dpo_pool); +} + +index_t +mpls_label_dpo_create (mpls_label_t *label_stack, + mpls_eos_bit_t eos, + u8 ttl, + u8 exp, + dpo_proto_t payload_proto, + const dpo_id_t *dpo) +{ + mpls_label_dpo_t *mld; + u32 ii; + + mld = mpls_label_dpo_alloc(); + mld->mld_n_labels = vec_len(label_stack); + mld->mld_n_hdr_bytes = mld->mld_n_labels * sizeof(mld->mld_hdr[0]); + mld->mld_payload_proto = payload_proto; + + /* + * construct label rewrite headers for each value value passed. + * get the header in network byte order since we will paint it + * on a packet in the data-plane + */ + + for (ii = 0; ii < mld->mld_n_labels-1; ii++) + { + vnet_mpls_uc_set_label(&mld->mld_hdr[ii].label_exp_s_ttl, label_stack[ii]); + vnet_mpls_uc_set_ttl(&mld->mld_hdr[ii].label_exp_s_ttl, 255); + vnet_mpls_uc_set_exp(&mld->mld_hdr[ii].label_exp_s_ttl, 0); + vnet_mpls_uc_set_s(&mld->mld_hdr[ii].label_exp_s_ttl, MPLS_NON_EOS); + mld->mld_hdr[ii].label_exp_s_ttl = + clib_host_to_net_u32(mld->mld_hdr[ii].label_exp_s_ttl); + } + + /* + * the inner most label + */ + ii = mld->mld_n_labels-1; + + vnet_mpls_uc_set_label(&mld->mld_hdr[ii].label_exp_s_ttl, label_stack[ii]); + vnet_mpls_uc_set_ttl(&mld->mld_hdr[ii].label_exp_s_ttl, ttl); + vnet_mpls_uc_set_exp(&mld->mld_hdr[ii].label_exp_s_ttl, exp); + vnet_mpls_uc_set_s(&mld->mld_hdr[ii].label_exp_s_ttl, eos); + mld->mld_hdr[ii].label_exp_s_ttl = + clib_host_to_net_u32(mld->mld_hdr[ii].label_exp_s_ttl); + + /* + * stack this label objct on its parent. + */ + dpo_stack(DPO_MPLS_LABEL, + mld->mld_payload_proto, + &mld->mld_dpo, + dpo); + + return (mpls_label_dpo_get_index(mld)); +} + +u8* +format_mpls_label_dpo (u8 *s, va_list *args) +{ + index_t index = va_arg (*args, index_t); + u32 indent = va_arg (*args, u32); + mpls_unicast_header_t hdr; + mpls_label_dpo_t *mld; + u32 ii; + + mld = mpls_label_dpo_get(index); + + s = format(s, "mpls-label:[%d]:", index); + + for (ii = 0; ii < mld->mld_n_labels; ii++) + { + hdr.label_exp_s_ttl = + clib_net_to_host_u32(mld->mld_hdr[ii].label_exp_s_ttl); + s = format(s, "%U", format_mpls_header, hdr); + } + + s = format(s, "\n%U", format_white_space, indent); + s = format(s, "%U", format_dpo_id, &mld->mld_dpo, indent+2); + + return (s); +} + +static void +mpls_label_dpo_lock (dpo_id_t *dpo) +{ + mpls_label_dpo_t *mld; + + mld = mpls_label_dpo_get(dpo->dpoi_index); + + mld->mld_locks++; +} + +static void +mpls_label_dpo_unlock (dpo_id_t *dpo) +{ + mpls_label_dpo_t *mld; + + mld = mpls_label_dpo_get(dpo->dpoi_index); + + mld->mld_locks--; + + if (0 == mld->mld_locks) + { + dpo_reset(&mld->mld_dpo); + pool_put(mpls_label_dpo_pool, mld); + } +} + +/** + * @brief A struct to hold tracing information for the MPLS label imposition + * node. + */ +typedef struct mpls_label_imposition_trace_t_ +{ + /** + * The MPLS header imposed + */ + mpls_unicast_header_t hdr; +} mpls_label_imposition_trace_t; + +always_inline uword +mpls_label_imposition_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame, + u8 payload_is_ip4, + u8 payload_is_ip6) +{ + u32 n_left_from, next_index, * from, * to_next; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 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) + { + mpls_unicast_header_t *hdr0, *hdr1; + mpls_label_dpo_t *mld0, *mld1; + u32 bi0, mldi0, bi1, mldi1; + vlib_buffer_t * b0, *b1; + u32 next0, next1; + u8 ttl0, ttl1; + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + + /* Prefetch next iteration. */ + { + vlib_buffer_t * p2, * p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, STORE); + vlib_prefetch_buffer_header (p3, STORE); + + CLIB_PREFETCH (p2->data, sizeof (hdr0[0]), STORE); + CLIB_PREFETCH (p3->data, sizeof (hdr0[0]), STORE); + } + + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + /* dst lookup was done by ip4 lookup */ + mldi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX]; + mldi1 = vnet_buffer(b1)->ip.adj_index[VLIB_TX]; + mld0 = mpls_label_dpo_get(mldi0); + mld1 = mpls_label_dpo_get(mldi1); + + if (payload_is_ip4) + { + /* + * decrement the TTL on ingress to the LSP + */ + ip4_header_t * ip0 = vlib_buffer_get_current(b0); + ip4_header_t * ip1 = vlib_buffer_get_current(b1); + u32 checksum0; + u32 checksum1; + + checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100); + checksum1 = ip1->checksum + clib_host_to_net_u16 (0x0100); + + checksum0 += checksum0 >= 0xffff; + checksum1 += checksum1 >= 0xffff; + + ip0->checksum = checksum0; + ip1->checksum = checksum1; + + ip0->ttl -= 1; + ip1->ttl -= 1; + + ttl1 = ip1->ttl; + ttl0 = ip0->ttl; + } + else if (payload_is_ip6) + { + /* + * decrement the TTL on ingress to the LSP + */ + ip6_header_t * ip0 = vlib_buffer_get_current(b0); + ip6_header_t * ip1 = vlib_buffer_get_current(b1); + + + ip0->hop_limit -= 1; + ip1->hop_limit -= 1; + + ttl0 = ip0->hop_limit; + ttl1 = ip1->hop_limit; + } + else + { + /* + * else, the packet to be encapped is an MPLS packet + */ + if (PREDICT_TRUE(vnet_buffer(b0)->mpls.first)) + { + /* + * The first label to be imposed on the packet. this is a label swap. + * in which case we stashed the TTL and EXP bits in the + * packet in the lookup node + */ + ASSERT(0 != vnet_buffer (b0)->mpls.ttl); + + ttl0 = vnet_buffer(b0)->mpls.ttl - 1; + } + else + { + /* + * not the first label. implying we are recusring down a chain of + * output labels. + * Each layer is considered a new LSP - hence the TTL is reset. + */ + ttl0 = 255; + } + if (PREDICT_TRUE(vnet_buffer(b1)->mpls.first)) + { + ASSERT(1 != vnet_buffer (b1)->mpls.ttl); + ttl1 = vnet_buffer(b1)->mpls.ttl - 1; + } + else + { + ttl1 = 255; + } + } + vnet_buffer(b0)->mpls.first = 0; + vnet_buffer(b1)->mpls.first = 0; + + /* Paint the MPLS header */ + vlib_buffer_advance(b0, -(mld0->mld_n_hdr_bytes)); + vlib_buffer_advance(b1, -(mld1->mld_n_hdr_bytes)); + + hdr0 = vlib_buffer_get_current(b0); + hdr1 = vlib_buffer_get_current(b1); + + clib_memcpy(hdr0, mld0->mld_hdr, mld0->mld_n_hdr_bytes); + clib_memcpy(hdr1, mld1->mld_hdr, mld1->mld_n_hdr_bytes); + + /* fixup the TTL for the inner most label */ + hdr0 = hdr0 + (mld0->mld_n_labels - 1); + hdr1 = hdr1 + (mld1->mld_n_labels - 1); + ((char*)hdr0)[3] = ttl0; + ((char*)hdr1)[3] = ttl1; + + next0 = mld0->mld_dpo.dpoi_next_node; + next1 = mld1->mld_dpo.dpoi_next_node; + vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mld0->mld_dpo.dpoi_index; + vnet_buffer(b1)->ip.adj_index[VLIB_TX] = mld1->mld_dpo.dpoi_index; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + mpls_label_imposition_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->hdr = *hdr0; + } + if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) + { + mpls_label_imposition_trace_t *tr = + vlib_add_trace (vm, node, b1, sizeof (*tr)); + tr->hdr = *hdr1; + } + + 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) + { + mpls_unicast_header_t *hdr0; + mpls_label_dpo_t *mld0; + vlib_buffer_t * b0; + u32 bi0, mldi0; + u32 next0; + u8 ttl; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + /* dst lookup was done by ip4 lookup */ + mldi0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX]; + mld0 = mpls_label_dpo_get(mldi0); + + if (payload_is_ip4) + { + /* + * decrement the TTL on ingress to the LSP + */ + ip4_header_t * ip0 = vlib_buffer_get_current(b0); + u32 checksum0; + + checksum0 = ip0->checksum + clib_host_to_net_u16 (0x0100); + checksum0 += checksum0 >= 0xffff; + + ip0->checksum = checksum0; + ip0->ttl -= 1; + ttl = ip0->ttl; + } + else if (payload_is_ip6) + { + /* + * decrement the TTL on ingress to the LSP + */ + ip6_header_t * ip0 = vlib_buffer_get_current(b0); + + ip0->hop_limit -= 1; + ttl = ip0->hop_limit; + } + else + { + /* + * else, the packet to be encapped is an MPLS packet + */ + if (vnet_buffer(b0)->mpls.first) + { + /* + * The first label to be imposed on the packet. this is a label swap. + * in which case we stashed the TTL and EXP bits in the + * packet in the lookup node + */ + ASSERT(0 != vnet_buffer (b0)->mpls.ttl); + + ttl = vnet_buffer(b0)->mpls.ttl - 1; + } + else + { + /* + * not the first label. implying we are recusring down a chain of + * output labels. + * Each layer is considered a new LSP - hence the TTL is reset. + */ + ttl = 255; + } + } + vnet_buffer(b0)->mpls.first = 0; + + /* Paint the MPLS header */ + vlib_buffer_advance(b0, -(mld0->mld_n_hdr_bytes)); + hdr0 = vlib_buffer_get_current(b0); + clib_memcpy(hdr0, mld0->mld_hdr, mld0->mld_n_hdr_bytes); + + /* fixup the TTL for the inner most label */ + hdr0 = hdr0 + (mld0->mld_n_labels - 1); + ((char*)hdr0)[3] = ttl; + + next0 = mld0->mld_dpo.dpoi_next_node; + vnet_buffer(b0)->ip.adj_index[VLIB_TX] = mld0->mld_dpo.dpoi_index; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + mpls_label_imposition_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->hdr = *hdr0; + } + + vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + } + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + return from_frame->n_vectors; +} + +static u8 * +format_mpls_label_imposition_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_label_imposition_trace_t * t; + mpls_unicast_header_t hdr; + uword indent; + + t = va_arg (*args, mpls_label_imposition_trace_t *); + indent = format_get_indent (s); + hdr.label_exp_s_ttl = clib_net_to_host_u32(t->hdr.label_exp_s_ttl); + + s = format (s, "%Umpls-header:%U", + format_white_space, indent, + format_mpls_header, hdr); + return (s); +} + +static uword +mpls_label_imposition (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (mpls_label_imposition_inline(vm, node, frame, 0, 0)); +} + +VLIB_REGISTER_NODE (mpls_label_imposition_node) = { + .function = mpls_label_imposition, + .name = "mpls-label-imposition", + .vector_size = sizeof (u32), + + .format_trace = format_mpls_label_imposition_trace, + .n_next_nodes = 1, + .next_nodes = { + [0] = "error-drop", + } +}; +VLIB_NODE_FUNCTION_MULTIARCH (mpls_label_imposition_node, + mpls_label_imposition) + +static uword +ip4_mpls_label_imposition (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (mpls_label_imposition_inline(vm, node, frame, 1, 0)); +} + +VLIB_REGISTER_NODE (ip4_mpls_label_imposition_node) = { + .function = ip4_mpls_label_imposition, + .name = "ip4-mpls-label-imposition", + .vector_size = sizeof (u32), + + .format_trace = format_mpls_label_imposition_trace, + .n_next_nodes = 1, + .next_nodes = { + [0] = "error-drop", + } +}; +VLIB_NODE_FUNCTION_MULTIARCH (ip4_mpls_label_imposition_node, + ip4_mpls_label_imposition) + +static uword +ip6_mpls_label_imposition (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (mpls_label_imposition_inline(vm, node, frame, 0, 1)); +} + +VLIB_REGISTER_NODE (ip6_mpls_label_imposition_node) = { + .function = ip6_mpls_label_imposition, + .name = "ip6-mpls-label-imposition", + .vector_size = sizeof (u32), + + .format_trace = format_mpls_label_imposition_trace, + .n_next_nodes = 1, + .next_nodes = { + [0] = "error-drop", + } +}; +VLIB_NODE_FUNCTION_MULTIARCH (ip6_mpls_label_imposition_node, + ip6_mpls_label_imposition) + +static void +mpls_label_dpo_mem_show (void) +{ + fib_show_memory_usage("MPLS label", + pool_elts(mpls_label_dpo_pool), + pool_len(mpls_label_dpo_pool), + sizeof(mpls_label_dpo_t)); +} + +const static dpo_vft_t mld_vft = { + .dv_lock = mpls_label_dpo_lock, + .dv_unlock = mpls_label_dpo_unlock, + .dv_format = format_mpls_label_dpo, + .dv_mem_show = mpls_label_dpo_mem_show, +}; + +const static char* const mpls_label_imp_ip4_nodes[] = +{ + "ip4-mpls-label-imposition", + NULL, +}; +const static char* const mpls_label_imp_ip6_nodes[] = +{ + "ip6-mpls-label-imposition", + NULL, +}; +const static char* const mpls_label_imp_mpls_nodes[] = +{ + "mpls-label-imposition", + NULL, +}; +const static char* const * const mpls_label_imp_nodes[DPO_PROTO_NUM] = +{ + [DPO_PROTO_IP4] = mpls_label_imp_ip4_nodes, + [DPO_PROTO_IP6] = mpls_label_imp_ip6_nodes, + [DPO_PROTO_MPLS] = mpls_label_imp_mpls_nodes, +}; + + +void +mpls_label_dpo_module_init (void) +{ + dpo_register(DPO_MPLS_LABEL, &mld_vft, mpls_label_imp_nodes); +} -- cgit 1.2.3-korg