diff options
Diffstat (limited to 'src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c')
| -rw-r--r-- | src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c | 768 |
1 files changed, 768 insertions, 0 deletions
diff --git a/src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c b/src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c new file mode 100644 index 00000000..79ee58ec --- /dev/null +++ b/src/plugins/ioam/ip6/ioam_cache_tunnel_select_node.c @@ -0,0 +1,768 @@ +/* + * Copyright (c) 2017 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. + */ +/* + * ioam_cache_tunnel_select_node.c + * This file implements anycast server selection using ioam data + * attached to anycast service selection. + * Anycast service is reachable via multiple servers reachable + * over SR tunnels. + * Works with TCP Anycast application. + * Cache entry is created when TCP SYN is received for anycast destination. + * Response TCP SYN ACKs for anycast service is compared and selected + * response is forwarded. + * The functionality is introduced via graph nodes that are hooked into + * vnet graph via classifier configs like below: + * + * Enable anycast service selection: + * set ioam ip6 sr-tunnel-select oneway + * + * Enable following classifier on the anycast service client facing interface + * e.g. anycast service is db06::06 then: + * classify session acl-hit-next ip6-node ip6-add-syn-hop-by-hop table-index 0 match l3 + * ip6 dst db06::06 ioam-encap anycast + * + * Enable following classifier on the interfaces facing the server of anycast service: + * classify session acl-hit-next ip6-node ip6-lookup table-index 0 match l3 + * ip6 src db06::06 ioam-decap anycast + * + */ +#include <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> +#include <vnet/ip/ip.h> +#include <vnet/srv6/sr.h> +#include <ioam/ip6/ioam_cache.h> +#include <vnet/ip/ip6_hop_by_hop.h> +#include <vnet/ip/ip6_hop_by_hop_packet.h> + +typedef struct +{ + u32 next_index; + u32 flow_label; +} cache_ts_trace_t; + +/* packet trace format function */ +static u8 * +format_cache_ts_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 *); + cache_ts_trace_t *t = va_arg (*args, cache_ts_trace_t *); + + s = format (s, "CACHE: flow_label %d, next index %d", + t->flow_label, t->next_index); + return s; +} + +#define foreach_cache_ts_error \ +_(RECORDED, "ip6 iOAM headers cached") + +typedef enum +{ +#define _(sym,str) CACHE_TS_ERROR_##sym, + foreach_cache_ts_error +#undef _ + CACHE_TS_N_ERROR, +} cache_ts_error_t; + +static char *cache_ts_error_strings[] = { +#define _(sym,string) string, + foreach_cache_ts_error +#undef _ +}; + +typedef enum +{ + IOAM_CACHE_TS_NEXT_POP_HBYH, + IOAM_CACHE_TS_ERROR_NEXT_DROP, + IOAM_CACHE_TS_N_NEXT, +} cache_ts_next_t; + +static uword +ip6_ioam_cache_ts_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ioam_cache_main_t *cm = &ioam_cache_main; + u32 n_left_from, *from, *to_next; + cache_ts_next_t next_index; + u32 recorded = 0; + + from = vlib_frame_vector_args (frame); + n_left_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); + // TODO: dual loop + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *p0; + u32 next0 = IOAM_CACHE_TS_NEXT_POP_HBYH; + ip6_header_t *ip0; + ip6_hop_by_hop_header_t *hbh0, *hbh_cmp; + tcp_header_t *tcp0; + u32 tcp_offset0; + u32 cache_ts_index = 0; + u8 cache_thread_id = 0; + int result = 0; + int skip = 0; + + bi0 = from[0]; + from += 1; + n_left_from -= 1; + + p0 = vlib_get_buffer (vm, bi0); + ip0 = vlib_buffer_get_current (p0); + if (IP_PROTOCOL_TCP == + ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, &tcp_offset0)) + { + tcp0 = (tcp_header_t *) ((u8 *) ip0 + tcp_offset0); + if ((tcp0->flags & TCP_FLAG_SYN) == TCP_FLAG_SYN && + (tcp0->flags & TCP_FLAG_ACK) == TCP_FLAG_ACK) + { + /* Look up and compare */ + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + + if (0 == ioam_cache_ts_lookup (ip0, + hbh0->protocol, + clib_net_to_host_u16 + (tcp0->src_port), + clib_net_to_host_u16 + (tcp0->dst_port), + clib_net_to_host_u32 + (tcp0->ack_number), &hbh_cmp, + &cache_ts_index, + &cache_thread_id, 1)) + { + /* response seen */ + result = -1; + if (hbh_cmp) + result = + ip6_ioam_analyse_compare_path_delay (hbh0, hbh_cmp, + cm->criteria_oneway); + if (result >= 0) + { + /* current syn/ack is worse than the earlier: Drop */ + next0 = IOAM_CACHE_TS_ERROR_NEXT_DROP; + /* Check if all responses are received or time has exceeded + send cached response if yes */ + ioam_cache_ts_check_and_send (cache_thread_id, + cache_ts_index); + } + else + { + /* Update cache with this buffer */ + /* If successfully updated then skip sending it */ + if (0 == + (result = + ioam_cache_ts_update (cache_thread_id, + cache_ts_index, bi0, + hbh0))) + { + skip = 1; + } + else + next0 = IOAM_CACHE_TS_ERROR_NEXT_DROP; + } + } + else + { + next0 = IOAM_CACHE_TS_ERROR_NEXT_DROP; + } + } + else if ((tcp0->flags & TCP_FLAG_RST) == TCP_FLAG_RST) + { + /* Look up and compare */ + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + if (0 == ioam_cache_ts_lookup (ip0, hbh0->protocol, clib_net_to_host_u16 (tcp0->src_port), clib_net_to_host_u16 (tcp0->dst_port), clib_net_to_host_u32 (tcp0->ack_number), &hbh_cmp, &cache_ts_index, &cache_thread_id, 1)) //response seen + { + next0 = IOAM_CACHE_TS_ERROR_NEXT_DROP; + if (hbh_cmp) + ioam_cache_ts_check_and_send (cache_thread_id, + cache_ts_index); + } + + } + } + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (p0->flags & VLIB_BUFFER_IS_TRACED) + { + cache_ts_trace_t *t = + vlib_add_trace (vm, node, p0, sizeof (*t)); + t->flow_label = + clib_net_to_host_u32 + (ip0->ip_version_traffic_class_and_flow_label); + t->next_index = next0; + } + } + /* verify speculative enqueue, maybe switch current next frame */ + if (!skip) + { + to_next[0] = bi0; + to_next += 1; + n_left_to_next -= 1; + 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); + } + vlib_node_increment_counter (vm, ioam_cache_ts_node.index, + CACHE_TS_ERROR_RECORDED, recorded); + return frame->n_vectors; +} + +/* + * Node for IP6 iOAM header cache + */ +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ioam_cache_ts_node) = +{ + .function = ip6_ioam_cache_ts_node_fn, + .name = "ip6-ioam-tunnel-select", + .vector_size = sizeof (u32), + .format_trace = format_cache_ts_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN (cache_ts_error_strings), + .error_strings = cache_ts_error_strings, + .n_next_nodes = IOAM_CACHE_TS_N_NEXT, + /* edit / add dispositions here */ + .next_nodes = + { + [IOAM_CACHE_TS_NEXT_POP_HBYH] = "ip6-pop-hop-by-hop", + [IOAM_CACHE_TS_ERROR_NEXT_DROP] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +typedef struct +{ + u32 next_index; +} ip6_reset_ts_hbh_trace_t; + +/* packet trace format function */ +static u8 * +format_ip6_reset_ts_hbh_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 *); + ip6_reset_ts_hbh_trace_t *t = va_arg (*args, + ip6_reset_ts_hbh_trace_t *); + + s = + format (s, "IP6_IOAM_RESET_TUNNEL_SELECT_HBH: next index %d", + t->next_index); + return s; +} + +vlib_node_registration_t ip6_reset_ts_hbh_node; + +#define foreach_ip6_reset_ts_hbh_error \ +_(PROCESSED, "iOAM Syn/Ack Pkts processed") \ +_(SAVED, "iOAM Syn Pkts state saved") \ +_(REMOVED, "iOAM Syn/Ack Pkts state removed") + +typedef enum +{ +#define _(sym,str) IP6_RESET_TS_HBH_ERROR_##sym, + foreach_ip6_reset_ts_hbh_error +#undef _ + IP6_RESET_TS_HBH_N_ERROR, +} ip6_reset_ts_hbh_error_t; + +static char *ip6_reset_ts_hbh_error_strings[] = { +#define _(sym,string) string, + foreach_ip6_reset_ts_hbh_error +#undef _ +}; + +#define foreach_ip6_ioam_cache_ts_input_next \ + _(IP6_LOOKUP, "ip6-lookup") \ + _(DROP, "error-drop") + +typedef enum +{ +#define _(s,n) IP6_IOAM_CACHE_TS_INPUT_NEXT_##s, + foreach_ip6_ioam_cache_ts_input_next +#undef _ + IP6_IOAM_CACHE_TS_INPUT_N_NEXT, +} ip6_ioam_cache_ts_input_next_t; + + +static uword +ip6_reset_ts_hbh_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ioam_cache_main_t *cm = &ioam_cache_main; + u32 n_left_from, *from, *to_next; + ip_lookup_next_t next_index; + u32 processed = 0, cache_ts_added = 0; + u64 now; + u8 *rewrite = cm->rewrite; + u32 rewrite_length = vec_len (rewrite); + ioam_e2e_cache_option_t *e2e = 0; + u8 no_of_responses = cm->wait_for_responses; + + from = vlib_frame_vector_args (frame); + n_left_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); + + now = vlib_time_now (vm); + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + u32 next0, next1; + ip6_header_t *ip0, *ip1; + tcp_header_t *tcp0, *tcp1; + u32 tcp_offset0, tcp_offset1; + ip6_hop_by_hop_header_t *hbh0, *hbh1; + u64 *copy_src0, *copy_dst0, *copy_src1, *copy_dst1; + u16 new_l0, new_l1; + u32 pool_index0 = 0, pool_index1 = 0; + + next0 = next1 = IP6_IOAM_CACHE_TS_INPUT_NEXT_IP6_LOOKUP; + /* 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, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + } + + + /* speculatively enqueue b0 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + 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); + + ip0 = vlib_buffer_get_current (b0); + ip1 = vlib_buffer_get_current (b1); + + if (IP_PROTOCOL_TCP != + ip6_locate_header (b0, ip0, IP_PROTOCOL_TCP, &tcp_offset0)) + { + goto NEXT00; + } + tcp0 = (tcp_header_t *) ((u8 *) ip0 + tcp_offset0); + if ((tcp0->flags & TCP_FLAG_SYN) == TCP_FLAG_SYN && + (tcp0->flags & TCP_FLAG_ACK) == 0) + { + if (no_of_responses > 0) + { + /* Create TS select entry */ + if (0 == ioam_cache_ts_add (ip0, + clib_net_to_host_u16 + (tcp0->src_port), + clib_net_to_host_u16 + (tcp0->dst_port), + clib_net_to_host_u32 + (tcp0->seq_number) + 1, + no_of_responses, now, + vm->thread_index, &pool_index0)) + { + cache_ts_added++; + } + } + copy_dst0 = (u64 *) (((u8 *) ip0) - rewrite_length); + copy_src0 = (u64 *) ip0; + + copy_dst0[0] = copy_src0[0]; + copy_dst0[1] = copy_src0[1]; + copy_dst0[2] = copy_src0[2]; + copy_dst0[3] = copy_src0[3]; + copy_dst0[4] = copy_src0[4]; + + vlib_buffer_advance (b0, -(word) rewrite_length); + ip0 = vlib_buffer_get_current (b0); + + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + /* $$$ tune, rewrite_length is a multiple of 8 */ + clib_memcpy (hbh0, rewrite, rewrite_length); + e2e = + (ioam_e2e_cache_option_t *) ((u8 *) hbh0 + + cm->rewrite_pool_index_offset); + e2e->pool_id = (u8) vm->thread_index; + e2e->pool_index = pool_index0; + ioam_e2e_id_rewrite_handler ((ioam_e2e_id_option_t *) + ((u8 *) e2e + + sizeof (ioam_e2e_cache_option_t)), + &cm->sr_localsid_ts); + /* Patch the protocol chain, insert the h-b-h (type 0) header */ + hbh0->protocol = ip0->protocol; + ip0->protocol = 0; + new_l0 = + clib_net_to_host_u16 (ip0->payload_length) + rewrite_length; + ip0->payload_length = clib_host_to_net_u16 (new_l0); + processed++; + } + + NEXT00: + if (IP_PROTOCOL_TCP != + ip6_locate_header (b1, ip1, IP_PROTOCOL_TCP, &tcp_offset1)) + { + goto TRACE00; + } + tcp1 = (tcp_header_t *) ((u8 *) ip1 + tcp_offset1); + if ((tcp1->flags & TCP_FLAG_SYN) == TCP_FLAG_SYN && + (tcp1->flags & TCP_FLAG_ACK) == 0) + { + if (no_of_responses > 0) + { + /* Create TS select entry */ + if (0 == ioam_cache_ts_add (ip1, + clib_net_to_host_u16 + (tcp1->src_port), + clib_net_to_host_u16 + (tcp1->dst_port), + clib_net_to_host_u32 + (tcp1->seq_number) + 1, + no_of_responses, now, + vm->thread_index, &pool_index1)) + { + cache_ts_added++; + } + } + + copy_dst1 = (u64 *) (((u8 *) ip1) - rewrite_length); + copy_src1 = (u64 *) ip1; + + copy_dst1[0] = copy_src1[0]; + copy_dst1[1] = copy_src1[1]; + copy_dst1[2] = copy_src1[2]; + copy_dst1[3] = copy_src1[3]; + copy_dst1[4] = copy_src1[4]; + + vlib_buffer_advance (b1, -(word) rewrite_length); + ip1 = vlib_buffer_get_current (b1); + + hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1); + /* $$$ tune, rewrite_length is a multiple of 8 */ + clib_memcpy (hbh1, rewrite, rewrite_length); + e2e = + (ioam_e2e_cache_option_t *) ((u8 *) hbh1 + + cm->rewrite_pool_index_offset); + e2e->pool_id = (u8) vm->thread_index; + e2e->pool_index = pool_index1; + ioam_e2e_id_rewrite_handler ((ioam_e2e_id_option_t *) + ((u8 *) e2e + + sizeof (ioam_e2e_cache_option_t)), + &cm->sr_localsid_ts); + /* Patch the protocol chain, insert the h-b-h (type 0) header */ + hbh1->protocol = ip1->protocol; + ip1->protocol = 0; + new_l1 = + clib_net_to_host_u16 (ip1->payload_length) + rewrite_length; + ip1->payload_length = clib_host_to_net_u16 (new_l1); + processed++; + } + + TRACE00: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + ip6_reset_ts_hbh_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_index = next0; + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + ip6_reset_ts_hbh_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->next_index = next1; + } + + } + + /* verify speculative enqueue, maybe switch current next frame */ + 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; + ip6_header_t *ip0; + tcp_header_t *tcp0; + u32 tcp_offset0; + ip6_hop_by_hop_header_t *hbh0; + u64 *copy_src0, *copy_dst0; + u16 new_l0; + u32 pool_index0 = 0; + + next0 = IP6_IOAM_CACHE_TS_INPUT_NEXT_IP6_LOOKUP; + /* speculatively enqueue b0 to the current next frame */ + 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); + + ip0 = vlib_buffer_get_current (b0); + if (IP_PROTOCOL_TCP != + ip6_locate_header (b0, ip0, IP_PROTOCOL_TCP, &tcp_offset0)) + { + goto TRACE0; + } + tcp0 = (tcp_header_t *) ((u8 *) ip0 + tcp_offset0); + if ((tcp0->flags & TCP_FLAG_SYN) == TCP_FLAG_SYN && + (tcp0->flags & TCP_FLAG_ACK) == 0) + { + if (no_of_responses > 0) + { + /* Create TS select entry */ + if (0 == ioam_cache_ts_add (ip0, + clib_net_to_host_u16 + (tcp0->src_port), + clib_net_to_host_u16 + (tcp0->dst_port), + clib_net_to_host_u32 + (tcp0->seq_number) + 1, + no_of_responses, now, + vm->thread_index, &pool_index0)) + { + cache_ts_added++; + } + } + copy_dst0 = (u64 *) (((u8 *) ip0) - rewrite_length); + copy_src0 = (u64 *) ip0; + + copy_dst0[0] = copy_src0[0]; + copy_dst0[1] = copy_src0[1]; + copy_dst0[2] = copy_src0[2]; + copy_dst0[3] = copy_src0[3]; + copy_dst0[4] = copy_src0[4]; + + vlib_buffer_advance (b0, -(word) rewrite_length); + ip0 = vlib_buffer_get_current (b0); + + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + /* $$$ tune, rewrite_length is a multiple of 8 */ + clib_memcpy (hbh0, rewrite, rewrite_length); + e2e = + (ioam_e2e_cache_option_t *) ((u8 *) hbh0 + + cm->rewrite_pool_index_offset); + e2e->pool_id = (u8) vm->thread_index; + e2e->pool_index = pool_index0; + ioam_e2e_id_rewrite_handler ((ioam_e2e_id_option_t *) + ((u8 *) e2e + + sizeof (ioam_e2e_cache_option_t)), + &cm->sr_localsid_ts); + /* Patch the protocol chain, insert the h-b-h (type 0) header */ + hbh0->protocol = ip0->protocol; + ip0->protocol = 0; + new_l0 = + clib_net_to_host_u16 (ip0->payload_length) + rewrite_length; + ip0->payload_length = clib_host_to_net_u16 (new_l0); + processed++; + } + TRACE0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + ip6_reset_ts_hbh_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_index = 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); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + vlib_node_increment_counter (vm, ip6_reset_ts_hbh_node.index, + IP6_RESET_TS_HBH_ERROR_PROCESSED, processed); + vlib_node_increment_counter (vm, ip6_reset_ts_hbh_node.index, + IP6_RESET_TS_HBH_ERROR_SAVED, cache_ts_added); + + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_reset_ts_hbh_node) = +{ + .function = ip6_reset_ts_hbh_node_fn, + .name = "ip6-add-syn-hop-by-hop", + .vector_size = sizeof (u32), + .format_trace = format_ip6_reset_ts_hbh_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN (ip6_reset_ts_hbh_error_strings), + .error_strings = ip6_reset_ts_hbh_error_strings, + /* See ip/lookup.h */ + .n_next_nodes = IP6_IOAM_CACHE_TS_INPUT_N_NEXT, + .next_nodes = + { +#define _(s,n) [IP6_IOAM_CACHE_TS_INPUT_NEXT_##s] = n, + foreach_ip6_ioam_cache_ts_input_next +#undef _ + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_reset_ts_hbh_node, ip6_reset_ts_hbh_node_fn) +/* *INDENT-ON* */ + +vlib_node_registration_t ioam_cache_ts_timer_tick_node; + +typedef struct +{ + u32 thread_index; +} ioam_cache_ts_timer_tick_trace_t; + +/* packet trace format function */ +static u8 * +format_ioam_cache_ts_timer_tick_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 *); + ioam_cache_ts_timer_tick_trace_t *t = + va_arg (*args, ioam_cache_ts_timer_tick_trace_t *); + + s = format (s, "IOAM_CACHE_TS_TIMER_TICK: thread index %d", + t->thread_index); + return s; +} + +#define foreach_ioam_cache_ts_timer_tick_error \ + _(TIMER, "Timer events") + +typedef enum +{ +#define _(sym,str) IOAM_CACHE_TS_TIMER_TICK_ERROR_##sym, + foreach_ioam_cache_ts_timer_tick_error +#undef _ + IOAM_CACHE_TS_TIMER_TICK_N_ERROR, +} ioam_cache_ts_timer_tick_error_t; + +static char *ioam_cache_ts_timer_tick_error_strings[] = { +#define _(sym,string) string, + foreach_ioam_cache_ts_timer_tick_error +#undef _ +}; + +void +ioam_cache_ts_timer_node_enable (vlib_main_t * vm, u8 enable) +{ + vlib_node_set_state (vm, ioam_cache_ts_timer_tick_node.index, + enable == + 0 ? VLIB_NODE_STATE_DISABLED : + VLIB_NODE_STATE_POLLING); +} + +void +expired_cache_ts_timer_callback (u32 * expired_timers) +{ + ioam_cache_main_t *cm = &ioam_cache_main; + int i; + u32 pool_index; + u32 thread_index = vlib_get_thread_index (); + u32 count = 0; + + for (i = 0; i < vec_len (expired_timers); i++) + { + /* Get pool index and pool id */ + pool_index = expired_timers[i] & 0x0FFFFFFF; + + /* Handle expiration */ + ioam_cache_ts_send (thread_index, pool_index); + count++; + } + vlib_node_increment_counter (cm->vlib_main, + ioam_cache_ts_timer_tick_node.index, + IOAM_CACHE_TS_TIMER_TICK_ERROR_TIMER, count); +} + +static uword +ioam_cache_ts_timer_tick_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * f) +{ + ioam_cache_main_t *cm = &ioam_cache_main; + u32 my_thread_index = vlib_get_thread_index (); + struct timespec ts, tsrem; + + tw_timer_expire_timers_16t_2w_512sl (&cm->timer_wheels[my_thread_index], + vlib_time_now (vm)); + ts.tv_sec = 0; + ts.tv_nsec = 1000 * 1000 * IOAM_CACHE_TS_TICK; + while (nanosleep (&ts, &tsrem) < 0) + { + ts = tsrem; + } + + return 0; +} +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ioam_cache_ts_timer_tick_node) = { + .function = ioam_cache_ts_timer_tick_node_fn, + .name = "ioam-cache-ts-timer-tick", + .format_trace = format_ioam_cache_ts_timer_tick_trace, + .type = VLIB_NODE_TYPE_INPUT, + + .n_errors = ARRAY_LEN(ioam_cache_ts_timer_tick_error_strings), + .error_strings = ioam_cache_ts_timer_tick_error_strings, + + .n_next_nodes = 1, + + .state = VLIB_NODE_STATE_DISABLED, + + /* edit / add dispositions here */ + .next_nodes = { + [0] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |