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Diffstat (limited to 'src/plugins/nat/nat44_handoff.c')
| -rw-r--r-- | src/plugins/nat/nat44_handoff.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/plugins/nat/nat44_handoff.c b/src/plugins/nat/nat44_handoff.c new file mode 100644 index 00000000000..a49b8de658f --- /dev/null +++ b/src/plugins/nat/nat44_handoff.c @@ -0,0 +1,229 @@ +/* + * Copyright (c) 2018 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. + */ +/** + * @file + * @brief NAT44 worker handoff + */ + +#include <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/handoff.h> +#include <vnet/fib/ip4_fib.h> +#include <vppinfra/error.h> +#include <nat/nat.h> + +typedef struct +{ + u32 next_worker_index; + u8 in2out; +} nat44_handoff_trace_t; + +#define foreach_nat44_handoff_error \ +_(CONGESTION_DROP, "congestion drop") + +typedef enum +{ +#define _(sym,str) NAT44_HANDOFF_ERROR_##sym, + foreach_nat44_handoff_error +#undef _ + NAT44_HANDOFF_N_ERROR, +} nat44_handoff_error_t; + +static char *nat44_handoff_error_strings[] = { +#define _(sym,string) string, + foreach_nat44_handoff_error +#undef _ +}; + + +vlib_node_registration_t snat_in2out_worker_handoff_node; +vlib_node_registration_t snat_in2out_output_worker_handoff_node; +vlib_node_registration_t snat_out2in_worker_handoff_node; + +static u8 * +format_nat44_handoff_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 *); + nat44_handoff_trace_t *t = va_arg (*args, nat44_handoff_trace_t *); + char *tag; + + tag = t->in2out ? "IN2OUT" : "OUT2IN"; + s = + format (s, "NAT44_%s_WORKER_HANDOFF: next-worker %d", tag, + t->next_worker_index); + + return s; +} + +static inline uword +nat44_worker_handoff_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame, u8 is_output, + u8 is_in2out) +{ + snat_main_t *sm = &snat_main; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; + u32 n_enq, n_left_from, *from; + u16 thread_indices[VLIB_FRAME_SIZE], *ti; + u32 fq_index; + snat_get_worker_function_t *get_worker; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + vlib_get_buffers (vm, from, bufs, n_left_from); + + b = bufs; + ti = thread_indices; + + ASSERT (vec_len (sm->workers)); + + if (is_in2out) + { + get_worker = sm->worker_in2out_cb; + if (is_output) + fq_index = sm->fq_in2out_output_index; + else + fq_index = sm->fq_in2out_index; + } + else + { + fq_index = sm->fq_out2in_index; + get_worker = sm->worker_out2in_cb; + } + + while (n_left_from > 0) + { + u32 sw_if_index0; + u32 rx_fib_index0; + ip4_header_t *ip0; + + sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX]; + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); + ip0 = vlib_buffer_get_current (b[0]); + ti[0] = get_worker (ip0, rx_fib_index0); + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b[0]->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_handoff_trace_t *t = + vlib_add_trace (vm, node, b[0], sizeof (*t)); + t->next_worker_index = ti[0]; + t->in2out = is_in2out; + } + + n_left_from -= 1; + ti += 1; + b += 1; + } + + n_enq = + vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices, + frame->n_vectors, 1); + + if (n_enq < frame->n_vectors) + vlib_node_increment_counter (vm, node->node_index, + NAT44_HANDOFF_ERROR_CONGESTION_DROP, + frame->n_vectors - n_enq); + return frame->n_vectors; +} + +static uword +snat_in2out_worker_handoff_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 1); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = { + .function = snat_in2out_worker_handoff_fn, + .name = "nat44-in2out-worker-handoff", + .vector_size = sizeof (u32), + .format_trace = format_nat44_handoff_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(nat44_handoff_error_strings), + .error_strings = nat44_handoff_error_strings, + .n_next_nodes = 1, + .next_nodes = { + [0] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node, + snat_in2out_worker_handoff_fn); + +static uword +snat_in2out_output_worker_handoff_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_worker_handoff_fn_inline (vm, node, frame, 1, 1); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = { + .function = snat_in2out_output_worker_handoff_fn, + .name = "nat44-in2out-output-worker-handoff", + .vector_size = sizeof (u32), + .format_trace = format_nat44_handoff_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(nat44_handoff_error_strings), + .error_strings = nat44_handoff_error_strings, + .n_next_nodes = 1, + .next_nodes = { + [0] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_worker_handoff_node, + snat_in2out_output_worker_handoff_fn); + +static uword +snat_out2in_worker_handoff_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 0); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = { + .function = snat_out2in_worker_handoff_fn, + .name = "nat44-out2in-worker-handoff", + .vector_size = sizeof (u32), + .format_trace = format_nat44_handoff_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(nat44_handoff_error_strings), + .error_strings = nat44_handoff_error_strings, + .n_next_nodes = 1, + .next_nodes = { + [0] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_worker_handoff_node, + snat_out2in_worker_handoff_fn); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |