2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vppinfra/mem.h>
17 #include <vlib/vlib.h>
18 #include <vlib/unix/unix.h>
19 #include "stat_segment.h"
20 #include <vnet/vnet.h>
21 #include <vnet/devices/devices.h> /* vnet_get_aggregate_rx_packets */
22 #undef HAVE_MEMFD_CREATE
23 #include <vppinfra/linux/syscall.h>
24 #include <vpp-api/client/stat_client.h>
25 #include <vppinfra/mheap.h>
27 stat_segment_main_t stat_segment_main;
30 * Used only by VPP writers
33 vlib_stat_segment_lock (void)
35 stat_segment_main_t *sm = &stat_segment_main;
36 clib_spinlock_lock (sm->stat_segment_lockp);
37 sm->shared_header->in_progress = 1;
41 vlib_stat_segment_unlock (void)
43 stat_segment_main_t *sm = &stat_segment_main;
44 sm->shared_header->epoch++;
45 sm->shared_header->in_progress = 0;
46 clib_spinlock_unlock (sm->stat_segment_lockp);
50 * Change heap to the stats shared memory segment
53 vlib_stats_push_heap (void *old)
55 stat_segment_main_t *sm = &stat_segment_main;
58 ASSERT (sm && sm->shared_header);
59 return clib_mem_set_heap (sm->heap);
63 lookup_or_create_hash_index (u8 * name, u32 next_vector_index)
65 stat_segment_main_t *sm = &stat_segment_main;
69 /* Must be called in the context of the main heap */
70 ASSERT (clib_mem_get_heap () != sm->heap);
72 hp = hash_get_pair (sm->directory_vector_by_name, name);
75 /* we allocate our private copy of 'name' */
76 hash_set (sm->directory_vector_by_name, format (0, "%s%c", name, 0),
78 index = next_vector_index;
89 vlib_stats_pop_heap (void *cm_arg, void *oldheap, u32 cindex,
90 stat_directory_type_t type)
92 vlib_simple_counter_main_t *cm = (vlib_simple_counter_main_t *) cm_arg;
93 stat_segment_main_t *sm = &stat_segment_main;
94 stat_segment_shared_header_t *shared_header = sm->shared_header;
95 char *stat_segment_name;
96 stat_segment_directory_entry_t e = { 0 };
98 /* Not all counters have names / hash-table entries */
99 if (!cm->name && !cm->stat_segment_name)
101 clib_mem_set_heap (oldheap);
105 ASSERT (shared_header);
107 vlib_stat_segment_lock ();
109 /* Lookup hash-table is on the main heap */
111 cm->stat_segment_name ? cm->stat_segment_name : cm->name;
112 u32 next_vector_index = vec_len (sm->directory_vector);
113 clib_mem_set_heap (oldheap); /* Exit stats segment */
114 u32 vector_index = lookup_or_create_hash_index ((u8 *) stat_segment_name,
116 /* Back to stats segment */
117 clib_mem_set_heap (sm->heap); /* Re-enter stat segment */
120 /* Update the vector */
121 if (vector_index == next_vector_index)
123 strncpy (e.name, stat_segment_name, 128 - 1);
125 vec_add1 (sm->directory_vector, e);
128 stat_segment_directory_entry_t *ep = &sm->directory_vector[vector_index];
129 ep->offset = stat_segment_offset (shared_header, cm->counters); /* Vector of threads of vectors of counters */
131 ep->offset_vector ? stat_segment_pointer (shared_header,
132 ep->offset_vector) : 0;
134 /* Update the 2nd dimension offset vector */
136 vec_validate (offset_vector, vec_len (cm->counters) - 1);
138 if (sm->last != offset_vector)
140 for (i = 0; i < vec_len (cm->counters); i++)
142 stat_segment_offset (shared_header, cm->counters[i]);
145 offset_vector[cindex] =
146 stat_segment_offset (shared_header, cm->counters[cindex]);
148 ep->offset_vector = stat_segment_offset (shared_header, offset_vector);
149 sm->directory_vector[vector_index].offset =
150 stat_segment_offset (shared_header, cm->counters);
152 /* Reset the client hash table pointer, since it WILL change! */
153 shared_header->directory_offset =
154 stat_segment_offset (shared_header, sm->directory_vector);
156 vlib_stat_segment_unlock ();
157 clib_mem_set_heap (oldheap);
161 vlib_stats_register_error_index (void *oldheap, u8 * name, u64 * em_vec,
164 stat_segment_main_t *sm = &stat_segment_main;
165 stat_segment_shared_header_t *shared_header = sm->shared_header;
166 stat_segment_directory_entry_t e;
168 ASSERT (shared_header);
170 vlib_stat_segment_lock ();
171 u32 next_vector_index = vec_len (sm->directory_vector);
172 clib_mem_set_heap (oldheap); /* Exit stats segment */
174 u32 vector_index = lookup_or_create_hash_index (name,
177 /* Back to stats segment */
178 clib_mem_set_heap (sm->heap); /* Re-enter stat segment */
180 if (next_vector_index == vector_index)
182 memcpy (e.name, name, vec_len (name));
183 e.name[vec_len (name)] = '\0';
184 e.type = STAT_DIR_TYPE_ERROR_INDEX;
187 vec_add1 (sm->directory_vector, e);
189 /* Warn clients to refresh any pointers they might be holding */
190 shared_header->directory_offset =
191 stat_segment_offset (shared_header, sm->directory_vector);
194 vlib_stat_segment_unlock ();
198 stat_validate_counter_vector (stat_segment_directory_entry_t * ep, u32 max)
200 stat_segment_main_t *sm = &stat_segment_main;
201 stat_segment_shared_header_t *shared_header = sm->shared_header;
202 counter_t **counters = 0;
203 vlib_thread_main_t *tm = vlib_get_thread_main ();
205 u64 *offset_vector = 0;
207 vec_validate_aligned (counters, tm->n_vlib_mains - 1,
208 CLIB_CACHE_LINE_BYTES);
209 for (i = 0; i < tm->n_vlib_mains; i++)
211 vec_validate_aligned (counters[i], max, CLIB_CACHE_LINE_BYTES);
212 vec_add1 (offset_vector,
213 stat_segment_offset (shared_header, counters[i]));
215 ep->offset = stat_segment_offset (shared_header, counters);
216 ep->offset_vector = stat_segment_offset (shared_header, offset_vector);
220 vlib_stats_pop_heap2 (u64 * error_vector, u32 thread_index, void *oldheap,
223 stat_segment_main_t *sm = &stat_segment_main;
224 stat_segment_shared_header_t *shared_header = sm->shared_header;
226 ASSERT (shared_header);
229 vlib_stat_segment_lock ();
231 /* Reset the client hash table pointer, since it WILL change! */
232 vec_validate (sm->error_vector, thread_index);
233 sm->error_vector[thread_index] =
234 stat_segment_offset (shared_header, error_vector);
236 shared_header->error_offset =
237 stat_segment_offset (shared_header, sm->error_vector);
238 shared_header->directory_offset =
239 stat_segment_offset (shared_header, sm->directory_vector);
242 vlib_stat_segment_unlock ();
243 clib_mem_set_heap (oldheap);
247 vlib_map_stat_segment_init (void)
249 stat_segment_main_t *sm = &stat_segment_main;
250 stat_segment_shared_header_t *shared_header;
254 char *mem_name = "stat_segment_test";
257 memory_size = sm->memory_size;
258 if (memory_size == 0)
259 memory_size = STAT_SEGMENT_DEFAULT_SIZE;
261 /* Create shared memory segment */
262 if ((mfd = memfd_create (mem_name, 0)) < 0)
263 return clib_error_return (0, "stat segment memfd_create failure");
266 if ((ftruncate (mfd, memory_size)) == -1)
267 return clib_error_return (0, "stat segment ftruncate failure");
270 mmap (NULL, memory_size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd,
272 return clib_error_return (0, "stat segment mmap failure");
275 #if USE_DLMALLOC == 0
276 heap = mheap_alloc_with_flags (((u8 *) memaddr) + getpagesize (),
277 memory_size - getpagesize (),
278 MHEAP_FLAG_DISABLE_VM |
279 MHEAP_FLAG_THREAD_SAFE);
282 create_mspace_with_base (((u8 *) memaddr) + getpagesize (),
283 memory_size - getpagesize (), 1 /* locked */ );
284 mspace_disable_expand (heap);
290 sm->directory_vector_by_name = hash_create_string (0, sizeof (uword));
291 sm->shared_header = shared_header = memaddr;
293 shared_header->version = STAT_SEGMENT_VERSION;
295 sm->stat_segment_lockp = clib_mem_alloc (sizeof (clib_spinlock_t));
296 clib_spinlock_init (sm->stat_segment_lockp);
298 oldheap = clib_mem_set_heap (sm->heap);
300 /* Set up the name to counter-vector hash table */
301 sm->directory_vector = 0;
303 shared_header->epoch = 1;
305 /* Scalar stats and node counters */
306 vec_validate (sm->directory_vector, STAT_COUNTERS - 1);
308 strcpy(sm->directory_vector[STAT_COUNTER_##E].name, #p "/" #n); \
309 sm->directory_vector[STAT_COUNTER_##E].type = STAT_DIR_TYPE_##t;
310 foreach_stat_segment_counter_name
312 /* Save the vector offset in the shared segment, for clients */
313 shared_header->directory_offset =
314 stat_segment_offset (shared_header, sm->directory_vector);
316 clib_mem_set_heap (oldheap);
318 /* Total shared memory size */
319 clib_mem_usage_t usage;
320 mheap_usage (sm->heap, &usage);
321 sm->directory_vector[STAT_COUNTER_MEM_STATSEG_TOTAL].value =
328 name_sort_cmp (void *a1, void *a2)
330 stat_segment_directory_entry_t *n1 = a1;
331 stat_segment_directory_entry_t *n2 = a2;
333 return strcmp ((char *) n1->name, (char *) n2->name);
337 format_stat_dir_entry (u8 * s, va_list * args)
339 stat_segment_directory_entry_t *ep =
340 va_arg (*args, stat_segment_directory_entry_t *);
344 format_string = "%-74s %-10s %10lld";
348 case STAT_DIR_TYPE_SCALAR_INDEX:
349 type_name = "ScalarPtr";
352 case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
353 case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
354 type_name = "CMainPtr";
357 case STAT_DIR_TYPE_ERROR_INDEX:
358 type_name = "ErrIndex";
362 type_name = "illegal!";
366 return format (s, format_string, ep->name, type_name, ep->offset);
369 static clib_error_t *
370 show_stat_segment_command_fn (vlib_main_t * vm,
371 unformat_input_t * input,
372 vlib_cli_command_t * cmd)
374 stat_segment_main_t *sm = &stat_segment_main;
375 stat_segment_directory_entry_t *show_data;
380 if (unformat (input, "verbose"))
383 /* Lock even as reader, as this command doesn't handle epoch changes */
384 vlib_stat_segment_lock ();
385 show_data = vec_dup (sm->directory_vector);
386 vlib_stat_segment_unlock ();
388 vec_sort_with_function (show_data, name_sort_cmp);
390 vlib_cli_output (vm, "%-74s %10s %10s", "Name", "Type", "Value");
392 for (i = 0; i < vec_len (show_data); i++)
394 vlib_cli_output (vm, "%-100U", format_stat_dir_entry,
395 vec_elt_at_index (show_data, i));
401 vlib_cli_output (vm, "%U", format_mheap, sm->heap, 0 /* verbose */ );
408 VLIB_CLI_COMMAND (show_stat_segment_command, static) =
410 .path = "show statistics segment",
411 .short_help = "show statistics segment [verbose]",
412 .function = show_stat_segment_command_fn,
417 * Node performance counters:
418 * total_calls [threads][node-index]
425 update_node_counters (stat_segment_main_t * sm)
427 vlib_main_t **stat_vms = 0;
428 vlib_node_t ***node_dups = 0;
430 stat_segment_shared_header_t *shared_header = sm->shared_header;
431 static u32 no_max_nodes = 0;
433 vlib_node_get_nodes (0 /* vm, for barrier sync */ ,
434 (u32) ~ 0 /* all threads */ ,
435 1 /* include stats */ ,
436 0 /* barrier sync */ ,
437 &node_dups, &stat_vms);
439 u32 l = vec_len (node_dups[0]);
442 * Extend performance nodes if necessary
444 if (l > no_max_nodes)
446 void *oldheap = clib_mem_set_heap (sm->heap);
447 vlib_stat_segment_lock ();
449 stat_validate_counter_vector (&sm->directory_vector
450 [STAT_COUNTER_NODE_CLOCKS], l - 1);
451 stat_validate_counter_vector (&sm->directory_vector
452 [STAT_COUNTER_NODE_VECTORS], l - 1);
453 stat_validate_counter_vector (&sm->directory_vector
454 [STAT_COUNTER_NODE_CALLS], l - 1);
455 stat_validate_counter_vector (&sm->directory_vector
456 [STAT_COUNTER_NODE_SUSPENDS], l - 1);
458 vec_validate (sm->nodes, l - 1);
459 stat_segment_directory_entry_t *ep;
460 ep = &sm->directory_vector[STAT_COUNTER_NODE_NAMES];
461 ep->offset = stat_segment_offset (shared_header, sm->nodes);
465 ep->offset_vector ? stat_segment_pointer (shared_header,
466 ep->offset_vector) : 0;
467 /* Update names dictionary */
468 vec_validate (offset_vector, l - 1);
469 vlib_node_t **nodes = node_dups[0];
471 for (i = 0; i < vec_len (nodes); i++)
473 vlib_node_t *n = nodes[i];
475 s = format (s, "%v%c", n->name, 0);
476 if (sm->nodes[n->index])
477 vec_free (sm->nodes[n->index]);
478 sm->nodes[n->index] = s;
480 sm->nodes[i] ? stat_segment_offset (shared_header,
484 ep->offset_vector = stat_segment_offset (shared_header, offset_vector);
486 vlib_stat_segment_unlock ();
487 clib_mem_set_heap (oldheap);
491 for (j = 0; j < vec_len (node_dups); j++)
493 vlib_node_t **nodes = node_dups[j];
495 for (i = 0; i < vec_len (nodes); i++)
497 counter_t **counters;
499 vlib_node_t *n = nodes[i];
502 stat_segment_pointer (shared_header,
504 [STAT_COUNTER_NODE_CLOCKS].offset);
506 c[n->index] = n->stats_total.clocks - n->stats_last_clear.clocks;
509 stat_segment_pointer (shared_header,
511 [STAT_COUNTER_NODE_VECTORS].offset);
513 c[n->index] = n->stats_total.vectors - n->stats_last_clear.vectors;
516 stat_segment_pointer (shared_header,
518 [STAT_COUNTER_NODE_CALLS].offset);
520 c[n->index] = n->stats_total.calls - n->stats_last_clear.calls;
523 stat_segment_pointer (shared_header,
525 [STAT_COUNTER_NODE_SUSPENDS].offset);
528 n->stats_total.suspends - n->stats_last_clear.suspends;
534 do_stat_segment_updates (stat_segment_main_t * sm)
536 stat_segment_shared_header_t *shared_header = sm->shared_header;
537 vlib_main_t *vm = vlib_mains[0];
541 vlib_main_t *this_vlib_main;
543 counter_t **counters;
544 static int num_worker_threads_set;
547 * Set once at the beginning of time.
548 * Can't do this from the init routine, which happens before
549 * start_workers sets up vlib_mains...
551 if (PREDICT_FALSE (num_worker_threads_set == 0))
553 sm->directory_vector[STAT_COUNTER_NUM_WORKER_THREADS].value =
554 vec_len (vlib_mains) > 1 ? vec_len (vlib_mains) - 1 : 1;
556 stat_validate_counter_vector (&sm->directory_vector
557 [STAT_COUNTER_VECTOR_RATE_PER_WORKER],
558 vec_len (vlib_mains));
559 num_worker_threads_set = 1;
563 * Compute per-worker vector rates, and the average vector rate
569 stat_segment_pointer (shared_header,
571 [STAT_COUNTER_VECTOR_RATE_PER_WORKER].offset);
573 start = vec_len (vlib_mains) > 1 ? 1 : 0;
575 for (i = start; i < vec_len (vlib_mains); i++)
578 f64 this_vector_rate;
580 this_vlib_main = vlib_mains[i];
582 this_vector_rate = vlib_last_vector_length_per_node (this_vlib_main);
583 vector_rate += this_vector_rate;
585 /* Set the per-worker rate */
586 counters[i - start][0] = this_vector_rate;
589 /* And set the system average rate */
590 vector_rate /= (f64) (i - start);
592 sm->directory_vector[STAT_COUNTER_VECTOR_RATE].value = vector_rate;
595 * Compute the aggregate input rate
597 now = vlib_time_now (vm);
598 dt = now - sm->directory_vector[STAT_COUNTER_LAST_UPDATE].value;
599 input_packets = vnet_get_aggregate_rx_packets ();
600 sm->directory_vector[STAT_COUNTER_INPUT_RATE].value =
601 (f64) (input_packets - sm->last_input_packets) / dt;
602 sm->directory_vector[STAT_COUNTER_LAST_UPDATE].value = now;
603 sm->last_input_packets = input_packets;
604 sm->directory_vector[STAT_COUNTER_LAST_STATS_CLEAR].value =
605 vm->node_main.time_last_runtime_stats_clear;
607 /* Stats segment memory heap counter */
608 clib_mem_usage_t usage;
609 mheap_usage (sm->heap, &usage);
610 sm->directory_vector[STAT_COUNTER_MEM_STATSEG_USED].value =
613 if (sm->node_counters_enabled)
614 update_node_counters (sm);
617 stat_segment_gauges_pool_t *g;
618 pool_foreach(g, sm->gauges,
620 g->fn(&sm->directory_vector[g->directory_index], g->caller_index);
624 /* Heartbeat, so clients detect we're still here */
625 sm->directory_vector[STAT_COUNTER_HEARTBEAT].value++;
629 * Accept connection on the socket and exchange the fd for the shared
632 static clib_error_t *
633 stats_socket_accept_ready (clib_file_t * uf)
635 stat_segment_main_t *sm = &stat_segment_main;
637 clib_socket_t client = { 0 };
639 err = clib_socket_accept (sm->socket, &client);
642 clib_error_report (err);
646 /* Send the fd across and close */
647 err = clib_socket_sendmsg (&client, 0, 0, &sm->memfd, 1);
649 clib_error_report (err);
650 clib_socket_close (&client);
655 static clib_error_t *
656 stats_segment_socket_init (void)
658 stat_segment_main_t *sm = &stat_segment_main;
660 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
662 memset (s, 0, sizeof (clib_socket_t));
663 s->config = (char *) sm->socket_name;
664 s->flags = CLIB_SOCKET_F_IS_SERVER | CLIB_SOCKET_F_SEQPACKET |
665 CLIB_SOCKET_F_ALLOW_GROUP_WRITE | CLIB_SOCKET_F_PASSCRED;
667 if ((error = clib_socket_init (s)))
670 clib_file_t template = { 0 };
671 template.read_function = stats_socket_accept_ready;
672 template.file_descriptor = s->fd;
673 template.description = format (0, "stats segment listener %s", s->config);
674 clib_file_add (&file_main, &template);
681 static clib_error_t *
682 stats_segment_socket_exit (vlib_main_t * vm)
685 * cleanup the listener socket on exit.
687 stat_segment_main_t *sm = &stat_segment_main;
688 unlink ((char *) sm->socket_name);
692 VLIB_MAIN_LOOP_EXIT_FUNCTION (stats_segment_socket_exit);
695 stat_segment_collector_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
698 stat_segment_main_t *sm = &stat_segment_main;
700 /* Wait for Godot... */
701 f64 sleep_duration = 10;
705 do_stat_segment_updates (sm);
706 vlib_process_suspend (vm, sleep_duration);
708 return 0; /* or not */
711 static clib_error_t *
712 statseg_init (vlib_main_t * vm)
714 stat_segment_main_t *sm = &stat_segment_main;
716 /* set default socket file name when statseg config stanza is empty. */
717 if (!vec_len (sm->socket_name))
718 sm->socket_name = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
719 STAT_SEGMENT_SOCKET_FILENAME, 0);
720 return stats_segment_socket_init ();
724 VLIB_INIT_FUNCTION (statseg_init) =
726 .runs_after = VLIB_INITS("unix_input_init"),
732 stat_segment_register_gauge (u8 * name, stat_segment_update_fn update_fn,
735 stat_segment_main_t *sm = &stat_segment_main;
736 stat_segment_shared_header_t *shared_header = sm->shared_header;
738 stat_segment_directory_entry_t e;
739 stat_segment_gauges_pool_t *gauge;
741 ASSERT (shared_header);
743 u32 next_vector_index = vec_len (sm->directory_vector);
744 u32 vector_index = lookup_or_create_hash_index (name,
747 if (vector_index < next_vector_index) /* Already registered */
748 return clib_error_return (0, "%v is alreadty registered", name);
750 oldheap = vlib_stats_push_heap (NULL);
751 vlib_stat_segment_lock ();
753 memset (&e, 0, sizeof (e));
754 e.type = STAT_DIR_TYPE_SCALAR_INDEX;
756 memcpy (e.name, name, vec_len (name));
757 vec_add1 (sm->directory_vector, e);
759 shared_header->directory_offset =
760 stat_segment_offset (shared_header, sm->directory_vector);
762 vlib_stat_segment_unlock ();
763 clib_mem_set_heap (oldheap);
765 /* Back on our own heap */
766 pool_get (sm->gauges, gauge);
767 gauge->fn = update_fn;
768 gauge->caller_index = caller_index;
769 gauge->directory_index = next_vector_index;
774 static clib_error_t *
775 statseg_config (vlib_main_t * vm, unformat_input_t * input)
777 stat_segment_main_t *sm = &stat_segment_main;
779 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
781 if (unformat (input, "socket-name %s", &sm->socket_name))
783 /* DEPRECATE: default (does nothing) */
784 else if (unformat (input, "default"))
786 else if (unformat (input, "size %U",
787 unformat_memory_size, &sm->memory_size))
789 else if (unformat (input, "per-node-counters on"))
790 sm->node_counters_enabled = 1;
791 else if (unformat (input, "per-node-counters off"))
792 sm->node_counters_enabled = 0;
794 return clib_error_return (0, "unknown input `%U'",
795 format_unformat_error, input);
799 * NULL-terminate socket name string
800 * clib_socket_init()->socket_config() use C str*
802 if (vec_len (sm->socket_name))
803 vec_terminate_c_string (sm->socket_name);
808 static clib_error_t *
809 statseg_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
811 stat_segment_main_t *sm = &stat_segment_main;
812 stat_segment_shared_header_t *shared_header = sm->shared_header;
814 void *oldheap = vlib_stats_push_heap (sm->interfaces);
815 vlib_stat_segment_lock ();
817 vec_validate (sm->interfaces, sw_if_index);
820 vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
821 vnet_sw_interface_t *si_sup =
822 vnet_get_sup_sw_interface (vnm, si->sw_if_index);
823 vnet_hw_interface_t *hi_sup;
825 ASSERT (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
826 hi_sup = vnet_get_hw_interface (vnm, si_sup->hw_if_index);
829 s = format (s, "%v", hi_sup->name);
830 if (si->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
831 s = format (s, ".%d", si->sub.id);
832 s = format (s, "%c", 0);
833 sm->interfaces[sw_if_index] = s;
837 vec_free (sm->interfaces[sw_if_index]);
838 sm->interfaces[sw_if_index] = 0;
841 stat_segment_directory_entry_t *ep;
842 ep = &sm->directory_vector[STAT_COUNTER_INTERFACE_NAMES];
843 ep->offset = stat_segment_offset (shared_header, sm->interfaces);
847 ep->offset_vector ? stat_segment_pointer (shared_header,
848 ep->offset_vector) : 0;
850 vec_validate (offset_vector, vec_len (sm->interfaces) - 1);
852 if (sm->last != sm->interfaces)
854 /* the interface vector moved, so need to recalulate the offset array */
855 for (i = 0; i < vec_len (sm->interfaces); i++)
858 sm->interfaces[i] ? stat_segment_offset (shared_header,
859 sm->interfaces[i]) : 0;
864 offset_vector[sw_if_index] =
865 sm->interfaces[sw_if_index] ?
866 stat_segment_offset (shared_header, sm->interfaces[sw_if_index]) : 0;
868 ep->offset_vector = stat_segment_offset (shared_header, offset_vector);
870 vlib_stat_segment_unlock ();
871 clib_mem_set_heap (oldheap);
876 VLIB_EARLY_CONFIG_FUNCTION (statseg_config, "statseg");
877 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (statseg_sw_interface_add_del);
880 VLIB_REGISTER_NODE (stat_segment_collector, static) =
882 .function = stat_segment_collector_process,
883 .name = "statseg-collector-process",
884 .type = VLIB_NODE_TYPE_PROCESS,
890 * fd.io coding-style-patch-verification: ON
893 * eval: (c-set-style "gnu")