/*
* 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;
}
#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;
VLIB_NODE_FN (ip6_reset_ts_hbh_node) (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);
/* $$$ tune, rewrite_length is a multiple of 8 */
clib_memcpy_fast (hbh0, rewrite, rewrite_length);
e2e =
(ioam_e2e_cache_option_t *) ((u8 *) hbh0 +
cm->rewrite_pool_index_offset);
e2e->pool_id = (u8) vm->thread_index;
e2e->pool_index = pool_index0;
ioam_e2e_id_rewrite_handler ((ioam_e2e_id_option_t *)
((u8 *) e2e +
sizeof (ioam_e2e_cache_option_t)),
&cm->sr_localsid_ts);
/* Patch the protocol chain, insert the h-b-h (type 0) header */
hbh0->protocol = ip0->protocol;
ip0->protocol = 0;
new_l0 =
clib_net_to_host_u16 (ip0->payload_length) + rewrite_length;
ip0->payload_length = clib_host_to_net_u16 (new_l0);
processed++;
}
NEXT00:
if (IP_PROTOCOL_TCP !=
ip6_locate_header (b1, ip1, IP_PROTOCOL_TCP, &tcp_offset1))
{
goto TRACE00;
}
tcp1 = (tcp_header_t *) ((u8 *) ip1 + tcp_offset1);
if ((tcp1->flags & TCP_FLAG_SYN) == TCP_FLAG_SYN &&
(tcp1->flags & TCP_FLAG_ACK) == 0)
{
if (no_of_responses > 0)
{
/* Create TS select entry */
if (0 == ioam_cache_ts_add (ip1,
clib_net_to_host_u16
(tcp1->src_port),
clib_net_to_host_u16
(tcp1->dst_port),
clib_net_to_host_u32
(tcp1->seq_number) + 1,
no_of_responses, now,
vm->thread_index, &pool_index1))
{
cache_ts_added++;
}
}
copy_dst1 = (u64 *) (((u8 *) ip1) - rewrite_length);
copy_src1 = (u64 *) ip1;
copy_dst1[0] = copy_src1[0];
copy_dst1[1] = copy_src1[1];
copy_dst1[2] = copy_src1[2];
copy_dst1[3] = copy_src1[3];
copy_dst1[4] = copy_src1[4];
vlib_buffer_advance (b1, -(word) rewrite_length);
ip1 = vlib_buffer_get_current (b1);
hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
/* $$$ tune, rewrite_length is a multiple of 8 */
clib_memcpy_fast (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_fast (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, cm->ip6_reset_ts_hbh_node_index,
IP6_RESET_TS_HBH_ERROR_PROCESSED, processed);
vlib_node_increment_counter (vm, cm->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) =
{
.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 _
},
};
/* *INDENT-ON* */
#ifndef CLIB_MARCH_VARIANT
vlib_node_registration_t ioam_cache_ts_timer_tick_node;
#endif /* CLIB_MARCH_VARIANT */
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 _
};
#ifndef CLIB_MARCH_VARIANT
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);
}
#endif /* CLIB_MARCH_VARIANT */
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:
*/