2 * Copyright (c) 2016-2018 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 <netinet/in.h>
18 #include <vlib/vlib.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vppinfra/error.h>
25 #include <vnet/ip/icmp46_packet.h>
27 #include <plugins/acl/fa_node.h>
28 #include <plugins/acl/acl.h>
29 #include <plugins/acl/lookup_context.h>
30 #include <plugins/acl/public_inlines.h>
31 #include <plugins/acl/session_inlines.h>
35 static_always_inline u8 *
36 format_ip46_session_bihash_kv (u8 * s, va_list * args, int is_ip6)
41 void *format_addr_func;
45 clib_bihash_kv_40_8_t *kv_40_8 =
46 va_arg (*args, clib_bihash_kv_40_8_t *);
47 a5t.kv_40_8 = *kv_40_8;
48 paddr0 = &a5t.ip6_addr[0];
49 paddr1 = &a5t.ip6_addr[1];
50 format_addr_func = format_ip6_address;
54 clib_bihash_kv_16_8_t *kv_16_8 =
55 va_arg (*args, clib_bihash_kv_16_8_t *);
56 a5t.kv_16_8 = *kv_16_8;
57 paddr0 = &a5t.ip4_addr[0];
58 paddr1 = &a5t.ip4_addr[1];
59 format_addr_func = format_ip4_address;
62 fa_full_session_id_t *sess = (fa_full_session_id_t *) & a5t.pkt;
64 return (format (s, "l3 %U -> %U %U | sess id %d thread id %d epoch %04x",
65 format_addr_func, paddr0,
66 format_addr_func, paddr1,
67 format_fa_session_l4_key, &a5t.l4,
68 sess->session_index, sess->thread_index,
69 sess->intf_policy_epoch));
73 format_ip6_session_bihash_kv (u8 * s, va_list * args)
75 return format_ip46_session_bihash_kv (s, args, 1);
79 format_ip4_session_bihash_kv (u8 * s, va_list * args)
81 return format_ip46_session_bihash_kv (s, args, 0);
86 acl_fa_verify_init_sessions (acl_main_t * am)
88 if (!am->fa_sessions_hash_is_initialized)
91 /* Allocate the per-worker sessions pools */
92 for (wk = 0; wk < vec_len (am->per_worker_data); wk++)
94 acl_fa_per_worker_data_t *pw = &am->per_worker_data[wk];
97 * // In lieu of trying to preallocate the pool and its free bitmap, rather use pool_init_fixed
98 * pool_alloc_aligned(pw->fa_sessions_pool, am->fa_conn_table_max_entries, CLIB_CACHE_LINE_BYTES);
99 * clib_bitmap_validate(pool_header(pw->fa_sessions_pool)->free_bitmap, am->fa_conn_table_max_entries);
101 pool_init_fixed (pw->fa_sessions_pool,
102 am->fa_conn_table_max_entries);
105 /* ... and the interface session hash table */
106 clib_bihash_init_40_8 (&am->fa_ip6_sessions_hash,
107 "ACL plugin FA IPv6 session bihash",
108 am->fa_conn_table_hash_num_buckets,
109 am->fa_conn_table_hash_memory_size);
110 clib_bihash_set_kvp_format_fn_40_8 (&am->fa_ip6_sessions_hash,
111 format_ip6_session_bihash_kv);
113 clib_bihash_init_16_8 (&am->fa_ip4_sessions_hash,
114 "ACL plugin FA IPv4 session bihash",
115 am->fa_conn_table_hash_num_buckets,
116 am->fa_conn_table_hash_memory_size);
117 clib_bihash_set_kvp_format_fn_16_8 (&am->fa_ip4_sessions_hash,
118 format_ip4_session_bihash_kv);
120 am->fa_sessions_hash_is_initialized = 1;
126 * Get the timeout of the session in a list since its enqueue time.
130 fa_session_get_list_timeout (acl_main_t * am, fa_session_t * sess)
132 u64 timeout = am->vlib_main->clib_time.clocks_per_second / 1000;
133 timeout = fa_session_get_timeout (am, sess);
134 /* for all user lists, check them twice per timeout */
135 timeout >>= (sess->link_list_id != ACL_TIMEOUT_PURGATORY);
140 acl_fa_get_list_head_expiry_time (acl_main_t * am,
141 acl_fa_per_worker_data_t * pw, u64 now,
142 u16 thread_index, int timeout_type)
144 return pw->fa_conn_list_head_expiry_time[timeout_type];
148 acl_fa_conn_time_to_check (acl_main_t * am, acl_fa_per_worker_data_t * pw,
149 u64 now, u16 thread_index, u32 session_index)
151 if (session_index == FA_SESSION_BOGUS_INDEX)
153 fa_session_t *sess = get_session_ptr (am, thread_index, session_index);
155 sess->link_enqueue_time + fa_session_get_list_timeout (am, sess);
156 return (timeout_time < now)
157 || (sess->link_enqueue_time <= pw->swipe_end_time);
161 * see if there are sessions ready to be checked,
162 * do the maintenance (requeue or delete), and
163 * return the total number of sessions reclaimed.
166 acl_fa_check_idle_sessions (acl_main_t * am, u16 thread_index, u64 now)
168 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
169 fa_full_session_id_t fsid;
170 fsid.thread_index = thread_index;
171 int total_expired = 0;
173 /* let the other threads enqueue more requests while we process, if they like */
174 aclp_swap_wip_and_pending_session_change_requests (am, thread_index);
177 vec_foreach (psr, pw->wip_session_change_requests)
179 acl_fa_sess_req_t op = *psr >> 32;
180 fsid.session_index = *psr & 0xffffffff;
183 case ACL_FA_REQ_SESS_RESCHEDULE:
184 acl_fa_restart_timer_for_session (am, now, fsid);
191 if (pw->wip_session_change_requests)
192 _vec_len (pw->wip_session_change_requests) = 0;
197 int n_pending_swipes = 0;
198 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
201 while (n_expired < am->fa_max_deleted_sessions_per_interval)
203 fsid.session_index = pw->fa_conn_list_head[tt];
204 if (!acl_fa_conn_time_to_check
205 (am, pw, now, thread_index, pw->fa_conn_list_head[tt]))
209 if (am->trace_sessions > 3)
211 elog_acl_maybe_trace_X3 (am,
212 "acl_fa_check_idle_sessions: expire session %d in list %d on thread %d",
213 "i4i4i4", (u32) fsid.session_index,
214 (u32) tt, (u32) thread_index);
216 vec_add1 (pw->expired, fsid.session_index);
218 acl_fa_conn_list_delete_session (am, fsid, now);
221 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
223 u32 session_index = pw->fa_conn_list_head[tt];
224 if (session_index == FA_SESSION_BOGUS_INDEX)
227 get_session_ptr (am, thread_index, session_index);
228 n_pending_swipes += sess->link_enqueue_time <= pw->swipe_end_time;
230 if (n_pending_swipes == 0)
232 pw->swipe_end_time = 0;
237 vec_foreach (psid, pw->expired)
239 fsid.session_index = *psid;
240 if (!pool_is_free_index (pw->fa_sessions_pool, fsid.session_index))
243 get_session_ptr (am, thread_index, fsid.session_index);
244 u32 sw_if_index = sess->sw_if_index;
245 u64 sess_timeout_time =
246 sess->last_active_time + fa_session_get_timeout (am, sess);
247 int timeout_passed = (now >= sess_timeout_time);
248 int clearing_interface =
249 clib_bitmap_get (pw->pending_clear_sw_if_index_bitmap, sw_if_index);
250 if (am->trace_sessions > 3)
252 elog_acl_maybe_trace_X2 (am,
253 "acl_fa_check_idle_sessions: now %lu sess_timeout_time %lu",
254 "i8i8", now, sess_timeout_time);
255 elog_acl_maybe_trace_X4 (am,
256 "acl_fa_check_idle_sessions: session %d sw_if_index %d timeout_passed %d clearing_interface %d",
257 "i4i4i4i4", (u32) fsid.session_index,
258 (u32) sess->sw_if_index,
259 (u32) timeout_passed,
260 (u32) clearing_interface);
262 if (timeout_passed || clearing_interface)
264 if (acl_fa_two_stage_delete_session (am, sw_if_index, fsid, now))
266 if (am->trace_sessions > 3)
268 elog_acl_maybe_trace_X2 (am,
269 "acl_fa_check_idle_sessions: deleted session %d sw_if_index %d",
270 "i4i4", (u32) fsid.session_index,
271 (u32) sess->sw_if_index);
273 /* the session has been put */
274 pw->cnt_deleted_sessions++;
278 /* the connection marked as deleted and put to purgatory */
279 if (am->trace_sessions > 3)
281 elog_acl_maybe_trace_X2 (am,
282 "acl_fa_check_idle_sessions: session %d sw_if_index %d marked as deleted, put to purgatory",
283 "i4i4", (u32) fsid.session_index,
284 (u32) sess->sw_if_index);
291 if (am->trace_sessions > 3)
293 elog_acl_maybe_trace_X2 (am,
294 "acl_fa_check_idle_sessions: restart timer for session %d sw_if_index %d",
295 "i4i4", (u32) fsid.session_index,
296 (u32) sess->sw_if_index);
298 /* There was activity on the session, so the idle timeout
299 has not passed. Enqueue for another time period. */
301 acl_fa_conn_list_add_session (am, fsid, now);
302 pw->cnt_session_timer_restarted++;
307 pw->cnt_already_deleted_sessions++;
310 total_expired = vec_len (pw->expired);
311 /* zero out the vector which we have acted on */
313 _vec_len (pw->expired) = 0;
314 /* if we were advancing and reached the end
315 * (no more sessions to recycle), reset the fast-forward timestamp */
317 if (pw->swipe_end_time && 0 == total_expired)
318 pw->swipe_end_time = 0;
320 elog_acl_maybe_trace_X1 (am,
321 "acl_fa_check_idle_sessions: done, total sessions expired: %d",
322 "i4", (u32) total_expired);
323 return (total_expired);
327 * This process ensures the connection cleanup happens every so often
328 * even in absence of traffic, as well as provides general orchestration
329 * for requests like connection deletion on a given sw_if_index.
334 #define foreach_acl_fa_cleaner_error \
335 _(UNKNOWN_EVENT, "unknown event received") \
340 #define _(sym,str) ACL_FA_CLEANER_ERROR_##sym,
341 foreach_acl_fa_cleaner_error
343 ACL_FA_CLEANER_N_ERROR,
344 } acl_fa_cleaner_error_t;
346 static char *acl_fa_cleaner_error_strings[] = {
347 #define _(sym,string) string,
348 foreach_acl_fa_cleaner_error
354 static vlib_node_registration_t acl_fa_session_cleaner_process_node;
355 static vlib_node_registration_t acl_fa_worker_session_cleaner_process_node;
358 send_one_worker_interrupt (vlib_main_t * vm, acl_main_t * am,
361 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
362 if (!pw->interrupt_is_pending)
364 pw->interrupt_is_pending = 1;
365 vlib_node_set_interrupt_pending (vlib_mains[thread_index],
366 acl_fa_worker_session_cleaner_process_node.index);
367 elog_acl_maybe_trace_X1 (am,
368 "send_one_worker_interrupt: send interrupt to worker %u",
369 "i4", ((u32) thread_index));
370 /* if the interrupt was requested, mark that done. */
371 /* pw->interrupt_is_needed = 0; */
372 CLIB_MEMORY_BARRIER ();
377 aclp_post_session_change_request (acl_main_t * am, u32 target_thread,
378 u32 target_session, u32 request_type)
380 acl_fa_per_worker_data_t *pw_me =
381 &am->per_worker_data[os_get_thread_index ()];
382 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
383 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
384 /* vec_add1 might cause a reallocation, change the heap just in case */
385 void *oldheap = clib_mem_set_heap (am->acl_mheap);
386 vec_add1 (pw->pending_session_change_requests,
387 (((u64) request_type) << 32) | target_session);
388 clib_mem_set_heap (oldheap);
390 pw->rcvd_session_change_requests++;
391 pw_me->sent_session_change_requests++;
392 if (vec_len (pw->pending_session_change_requests) == 1)
394 /* ensure the requests get processed */
395 send_one_worker_interrupt (am->vlib_main, am, target_thread);
397 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
401 aclp_swap_wip_and_pending_session_change_requests (acl_main_t * am,
404 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
406 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
407 tmp = pw->pending_session_change_requests;
408 pw->pending_session_change_requests = pw->wip_session_change_requests;
409 pw->wip_session_change_requests = tmp;
410 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
415 purgatory_has_connections (vlib_main_t * vm, acl_main_t * am,
418 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
420 return (FA_SESSION_BOGUS_INDEX !=
421 pw->fa_conn_list_head[ACL_TIMEOUT_PURGATORY]);
427 * Per-worker thread interrupt-driven cleaner thread
428 * to clean idle connections if there are no packets
431 acl_fa_worker_conn_cleaner_process (vlib_main_t * vm,
432 vlib_node_runtime_t * rt,
435 acl_main_t *am = &acl_main;
436 u64 now = clib_cpu_time_now ();
437 u16 thread_index = os_get_thread_index ();
438 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
440 elog_acl_maybe_trace_X1 (am,
441 "acl_fa_worker_conn_cleaner interrupt: now %lu",
443 /* allow another interrupt to be queued */
444 pw->interrupt_is_pending = 0;
445 if (pw->clear_in_process)
447 if (0 == pw->swipe_end_time)
450 * Someone has just set the flag to start clearing.
451 * we do this by combing through the connections up to a "time T"
452 * which is now, and requeueing everything except the expired
453 * connections and those matching the interface(s) being cleared.
457 * first filter the sw_if_index bitmap that they want from us, by
458 * a bitmap of sw_if_index for which we actually have connections.
460 if ((pw->pending_clear_sw_if_index_bitmap == 0)
461 || (pw->serviced_sw_if_index_bitmap == 0))
463 elog_acl_maybe_trace_X1 (am,
464 "acl_fa_worker_conn_cleaner: now %lu, someone tried to call clear but one of the bitmaps are empty",
466 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
470 #ifdef FA_NODE_VERBOSE_DEBUG
472 ("WORKER-CLEAR: (before and) swiping sw-if-index bitmap: %U, my serviced bitmap %U",
473 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
474 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
476 pw->pending_clear_sw_if_index_bitmap =
477 clib_bitmap_and (pw->pending_clear_sw_if_index_bitmap,
478 pw->serviced_sw_if_index_bitmap);
481 if (clib_bitmap_is_zero (pw->pending_clear_sw_if_index_bitmap))
483 /* if the cross-section is a zero vector, no need to do anything. */
484 elog_acl_maybe_trace_X1 (am,
485 "acl_fa_worker_conn_cleaner: now %lu, clearing done, nothing to do",
487 pw->clear_in_process = 0;
488 pw->swipe_end_time = 0;
492 #ifdef FA_NODE_VERBOSE_DEBUG
494 ("WORKER-CLEAR: swiping sw-if-index bitmap: %U, my serviced bitmap %U",
495 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
496 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
498 elog_acl_maybe_trace_X1 (am,
499 "acl_fa_worker_conn_cleaner: swiping until %lu",
501 /* swipe through the connection lists until enqueue timestamps become above "now" */
502 pw->swipe_end_time = now;
506 num_expired = acl_fa_check_idle_sessions (am, thread_index, now);
507 // clib_warning("WORKER-CLEAR: checked %d sessions (clear_in_progress: %d)", num_expired, pw->clear_in_process);
508 elog_acl_maybe_trace_X2 (am,
509 "acl_fa_worker_conn_cleaner: checked %d sessions (clear_in_process: %d)",
510 "i4i4", (u32) num_expired,
511 (u32) pw->clear_in_process);
512 if (pw->clear_in_process)
514 if (pw->swipe_end_time == 0)
516 /* we were clearing but we could not process any more connections. time to stop. */
517 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
518 pw->clear_in_process = 0;
519 elog_acl_maybe_trace_X1 (am,
520 "acl_fa_worker_conn_cleaner: now %lu, clearing done - all done",
525 elog_acl_maybe_trace_X1 (am,
526 "acl_fa_worker_conn_cleaner: now %lu, more work to do - requesting interrupt",
528 /* should continue clearing.. So could they please sent an interrupt again? */
529 send_one_worker_interrupt (vm, am, thread_index);
530 // pw->interrupt_is_needed = 1;
537 /* there was too much work, we should get an interrupt ASAP */
538 // pw->interrupt_is_needed = 1;
539 send_one_worker_interrupt (vm, am, thread_index);
540 pw->interrupt_is_unwanted = 0;
544 /* the current rate of interrupts is ok */
545 pw->interrupt_is_needed = 0;
546 pw->interrupt_is_unwanted = 0;
548 elog_acl_maybe_trace_X3 (am,
549 "acl_fa_worker_conn_cleaner: now %lu, interrupt needed: %u, interrupt unwanted: %u",
550 "i8i4i4", now, ((u32) pw->interrupt_is_needed),
551 ((u32) pw->interrupt_is_unwanted));
553 /* be persistent about quickly deleting the connections from the purgatory */
554 if (purgatory_has_connections (vm, am, thread_index))
556 send_one_worker_interrupt (vm, am, thread_index);
558 pw->interrupt_generation = am->fa_interrupt_generation;
563 send_interrupts_to_workers (vlib_main_t * vm, acl_main_t * am)
566 /* Can't use vec_len(am->per_worker_data) since the threads might not have come up yet; */
567 int n_threads = vec_len (vlib_mains);
568 for (i = 0; i < n_threads; i++)
570 send_one_worker_interrupt (vm, am, i);
574 /* centralized process to drive per-worker cleaners */
576 acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
579 acl_main_t *am = &acl_main;
581 f64 cpu_cps = vm->clib_time.clocks_per_second;
583 /* We should check if there are connections to clean up - at least twice a second */
584 u64 max_timer_wait_interval = cpu_cps / 2;
585 uword event_type, *event_data = 0;
586 acl_fa_per_worker_data_t *pw0;
588 am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
589 am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
590 am->fa_interrupt_generation = 1;
593 now = clib_cpu_time_now ();
594 next_expire = now + am->fa_current_cleaner_timer_wait_interval;
595 int has_pending_conns = 0;
600 * walk over all per-thread list heads of different timeouts,
601 * and see if there are any connections pending.
602 * If there aren't - we do not need to wake up until the
603 * worker code signals that it has added a connection.
605 * Also, while we are at it, calculate the earliest we need to wake up.
607 for (ti = 0; ti < vec_len (vlib_mains); ti++)
609 if (ti >= vec_len (am->per_worker_data))
613 acl_fa_per_worker_data_t *pw = &am->per_worker_data[ti];
614 for (tt = 0; tt < vec_len (pw->fa_conn_list_head); tt++)
617 acl_fa_get_list_head_expiry_time (am, pw, now, ti, tt);
618 if ((head_expiry < next_expire) && !pw->interrupt_is_pending)
620 elog_acl_maybe_trace_X3 (am,
621 "acl_fa_session_cleaner_process: now %lu, worker: %u tt: %u",
622 "i8i2i2", now, ti, tt);
623 elog_acl_maybe_trace_X2 (am,
624 "acl_fa_session_cleaner_process: head expiry: %lu, is earlier than curr next expire: %lu",
625 "i8i8", head_expiry, next_expire);
626 next_expire = head_expiry;
628 if (FA_SESSION_BOGUS_INDEX != pw->fa_conn_list_head[tt])
630 has_pending_conns = 1;
635 /* If no pending connections and no ACL applied then no point in timing out */
636 if (!has_pending_conns && (0 == am->fa_total_enabled_count))
638 am->fa_cleaner_cnt_wait_without_timeout++;
639 elog_acl_maybe_trace_X1 (am,
640 "acl_conn_cleaner: now %lu entering wait without timeout",
642 (void) vlib_process_wait_for_event (vm);
643 event_type = vlib_process_get_events (vm, &event_data);
647 f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps;
650 /* skip waiting altogether */
655 am->fa_cleaner_cnt_wait_with_timeout++;
656 elog_acl_maybe_trace_X2 (am,
657 "acl_conn_cleaner: now %lu entering wait with timeout %.6f sec",
658 "i8f8", now, timeout);
659 (void) vlib_process_wait_for_event_or_clock (vm, timeout);
660 event_type = vlib_process_get_events (vm, &event_data);
669 case ACL_FA_CLEANER_RESCHEDULE:
672 case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
674 uword *clear_sw_if_index_bitmap = 0;
677 now = clib_cpu_time_now ();
678 elog_acl_maybe_trace_X1 (am,
679 "acl_fa_session_cleaner_process: now %lu, received ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX",
681 vec_foreach (sw_if_index0, event_data)
683 am->fa_cleaner_cnt_delete_by_sw_index++;
684 elog_acl_maybe_trace_X1 (am,
685 "acl_fa_session_cleaner_process: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX %u",
686 "i4", *sw_if_index0);
687 if (*sw_if_index0 == ~0)
693 if (!pool_is_free_index
694 (am->vnet_main->interface_main.sw_interfaces,
697 clear_sw_if_index_bitmap =
698 clib_bitmap_set (clear_sw_if_index_bitmap,
704 ("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U, clear_all: %u",
705 format_bitmap_hex, clear_sw_if_index_bitmap, clear_all);
706 vec_foreach (pw0, am->per_worker_data)
708 CLIB_MEMORY_BARRIER ();
709 while (pw0->clear_in_process)
711 CLIB_MEMORY_BARRIER ();
712 elog_acl_maybe_trace_X1 (am,
713 "ACL_FA_NODE_CLEAN: waiting previous cleaning cycle to finish on %u",
715 (u32) (pw0 - am->per_worker_data));
716 vlib_process_suspend (vm, 0.0001);
717 if (pw0->interrupt_is_needed)
719 send_one_worker_interrupt (vm, am,
720 (pw0 - am->per_worker_data));
723 if (pw0->clear_in_process)
726 ("ERROR-BUG! Could not initiate cleaning on worker because another cleanup in progress");
732 /* if we need to clear all, then just clear the interfaces that we are servicing */
733 pw0->pending_clear_sw_if_index_bitmap =
734 clib_bitmap_dup (pw0->serviced_sw_if_index_bitmap);
738 pw0->pending_clear_sw_if_index_bitmap =
739 clib_bitmap_dup (clear_sw_if_index_bitmap);
742 ("ACL_FA_CLEANER: thread %u, pending clear bitmap: %U",
743 (am->per_worker_data - pw0), format_bitmap_hex,
744 pw0->pending_clear_sw_if_index_bitmap);
745 pw0->clear_in_process = 1;
748 /* send some interrupts so they can start working */
749 send_interrupts_to_workers (vm, am);
751 /* now wait till they all complete */
752 acl_log_info ("CLEANER mains len: %u per-worker len: %d",
753 vec_len (vlib_mains),
754 vec_len (am->per_worker_data));
755 vec_foreach (pw0, am->per_worker_data)
757 CLIB_MEMORY_BARRIER ();
758 while (pw0->clear_in_process)
760 CLIB_MEMORY_BARRIER ();
761 elog_acl_maybe_trace_X1 (am,
762 "ACL_FA_NODE_CLEAN: waiting for my cleaning cycle to finish on %u",
764 (u32) (pw0 - am->per_worker_data));
765 vlib_process_suspend (vm, 0.0001);
766 if (pw0->interrupt_is_needed)
768 send_one_worker_interrupt (vm, am,
769 (pw0 - am->per_worker_data));
773 acl_log_info ("ACL_FA_NODE_CLEAN: cleaning done");
774 clib_bitmap_free (clear_sw_if_index_bitmap);
776 am->fa_cleaner_cnt_delete_by_sw_index_ok++;
779 #ifdef FA_NODE_VERBOSE_DEBUG
780 clib_warning ("ACL plugin connection cleaner: unknown event %u",
783 vlib_node_increment_counter (vm,
784 acl_fa_session_cleaner_process_node.
786 ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1);
787 am->fa_cleaner_cnt_unknown_event++;
791 send_interrupts_to_workers (vm, am);
794 _vec_len (event_data) = 0;
797 * If the interrupts were not processed yet, ensure we wait a bit,
800 int need_more_wait = 0;
801 int max_wait_cycles = 100;
805 vec_foreach (pw0, am->per_worker_data)
807 if (pw0->interrupt_generation != am->fa_interrupt_generation)
814 vlib_process_suspend (vm, 0.0001);
817 while (need_more_wait && (--max_wait_cycles > 0));
819 int interrupts_needed = 0;
820 int interrupts_unwanted = 0;
822 vec_foreach (pw0, am->per_worker_data)
824 if (pw0->interrupt_is_needed)
827 /* the per-worker value is reset when sending the interrupt */
829 if (pw0->interrupt_is_unwanted)
831 interrupts_unwanted++;
832 pw0->interrupt_is_unwanted = 0;
835 if (interrupts_needed)
837 /* they need more interrupts, do less waiting around next time */
838 am->fa_current_cleaner_timer_wait_interval /= 2;
839 /* never go into zero-wait either though - we need to give the space to others */
840 am->fa_current_cleaner_timer_wait_interval += 1;
842 else if (interrupts_unwanted)
844 /* slowly increase the amount of sleep up to a limit */
845 if (am->fa_current_cleaner_timer_wait_interval <
846 max_timer_wait_interval)
847 am->fa_current_cleaner_timer_wait_interval +=
848 cpu_cps * am->fa_cleaner_wait_time_increment;
850 am->fa_cleaner_cnt_event_cycles++;
851 am->fa_interrupt_generation++;
859 acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
861 acl_main_t *am = &acl_main;
864 acl_fa_verify_init_sessions (am);
865 am->fa_total_enabled_count++;
866 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
867 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
868 ACL_FA_CLEANER_RESCHEDULE, 0);
869 clib_mem_set_heap (oldheap);
873 am->fa_total_enabled_count--;
878 ASSERT (clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index) !=
880 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
881 vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa",
882 sw_if_index, enable_disable, 0, 0);
883 vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa",
884 sw_if_index, enable_disable, 0, 0);
885 clib_mem_set_heap (oldheap);
886 am->fa_in_acl_on_sw_if_index =
887 clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index,
892 ASSERT (clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index) !=
894 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
895 vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa",
896 sw_if_index, enable_disable, 0, 0);
897 vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa",
898 sw_if_index, enable_disable, 0, 0);
899 clib_mem_set_heap (oldheap);
900 am->fa_out_acl_on_sw_if_index =
901 clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index,
904 if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index))
905 && (!acl_fa_ifc_has_out_acl (am, sw_if_index)))
907 #ifdef FA_NODE_VERBOSE_DEBUG
908 clib_warning ("ENABLE-DISABLE: clean the connections on interface %d",
911 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
912 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
913 ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
915 clib_mem_set_heap (oldheap);
920 show_fa_sessions_hash (vlib_main_t * vm, u32 verbose)
922 acl_main_t *am = &acl_main;
923 if (am->fa_sessions_hash_is_initialized)
925 vlib_cli_output (vm, "\nIPv6 Session lookup hash table:\n%U\n\n",
926 format_bihash_40_8, &am->fa_ip6_sessions_hash,
929 vlib_cli_output (vm, "\nIPv4 Session lookup hash table:\n%U\n\n",
930 format_bihash_16_8, &am->fa_ip4_sessions_hash,
936 "\nSession lookup hash table is not allocated.\n\n");
943 VLIB_REGISTER_NODE (acl_fa_worker_session_cleaner_process_node, static) = {
944 .function = acl_fa_worker_conn_cleaner_process,
945 .name = "acl-plugin-fa-worker-cleaner-process",
946 .type = VLIB_NODE_TYPE_INPUT,
947 .state = VLIB_NODE_STATE_INTERRUPT,
950 VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = {
951 .function = acl_fa_session_cleaner_process,
952 .type = VLIB_NODE_TYPE_PROCESS,
953 .name = "acl-plugin-fa-cleaner-process",
954 .n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings),
955 .error_strings = acl_fa_cleaner_error_strings,
964 * fd.io coding-style-patch-verification: ON
967 * eval: (c-set-style "gnu")