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>
34 format_ip6_session_bihash_kv (u8 * s, va_list * args)
36 clib_bihash_kv_40_8_t *kv_40_8 = va_arg (*args, clib_bihash_kv_40_8_t *);
39 a5t.kv_40_8 = *kv_40_8;
40 fa_full_session_id_t *sess = (fa_full_session_id_t *) & a5t.pkt;
42 return (format (s, "l3 %U -> %U"
43 " l4 lsb_of_sw_if_index %d proto %d l4_is_input %d l4_slow_path %d l4_reserved0 %d port %d -> %d | sess id %d thread id %d epoch %04x",
44 format_ip6_address, &a5t.ip6_addr[0],
45 format_ip6_address, &a5t.ip6_addr[1],
46 a5t.l4.lsb_of_sw_if_index,
47 a5t.l4.proto, a5t.l4.is_input, a5t.l4.is_slowpath,
48 a5t.l4.reserved0, a5t.l4.port[0], a5t.l4.port[1],
49 sess->session_index, sess->thread_index,
50 sess->intf_policy_epoch));
54 format_ip4_session_bihash_kv (u8 * s, va_list * args)
56 clib_bihash_kv_16_8_t *kv_16_8 = va_arg (*args, clib_bihash_kv_16_8_t *);
59 a5t.kv_16_8 = *kv_16_8;
60 fa_full_session_id_t *sess = (fa_full_session_id_t *) & a5t.pkt;
62 return (format (s, "l3 %U -> %U"
63 " l4 lsb_of_sw_if_index %d proto %d l4_is_input %d l4_slow_path %d l4_reserved0 %d port %d -> %d | sess id %d thread id %d epoch %04x",
64 format_ip4_address, &a5t.ip4_addr[0],
65 format_ip4_address, &a5t.ip4_addr[1],
66 a5t.l4.lsb_of_sw_if_index,
67 a5t.l4.proto, a5t.l4.is_input, a5t.l4.is_slowpath,
68 a5t.l4.reserved0, a5t.l4.port[0], a5t.l4.port[1],
69 sess->session_index, sess->thread_index,
70 sess->intf_policy_epoch));
75 acl_fa_verify_init_sessions (acl_main_t * am)
77 if (!am->fa_sessions_hash_is_initialized)
80 /* Allocate the per-worker sessions pools */
81 for (wk = 0; wk < vec_len (am->per_worker_data); wk++)
83 acl_fa_per_worker_data_t *pw = &am->per_worker_data[wk];
86 * // In lieu of trying to preallocate the pool and its free bitmap, rather use pool_init_fixed
87 * pool_alloc_aligned(pw->fa_sessions_pool, am->fa_conn_table_max_entries, CLIB_CACHE_LINE_BYTES);
88 * clib_bitmap_validate(pool_header(pw->fa_sessions_pool)->free_bitmap, am->fa_conn_table_max_entries);
90 pool_init_fixed (pw->fa_sessions_pool,
91 am->fa_conn_table_max_entries);
94 /* ... and the interface session hash table */
95 clib_bihash_init_40_8 (&am->fa_ip6_sessions_hash,
96 "ACL plugin FA IPv6 session bihash",
97 am->fa_conn_table_hash_num_buckets,
98 am->fa_conn_table_hash_memory_size);
99 clib_bihash_set_kvp_format_fn_40_8 (&am->fa_ip6_sessions_hash,
100 format_ip6_session_bihash_kv);
102 clib_bihash_init_16_8 (&am->fa_ip4_sessions_hash,
103 "ACL plugin FA IPv4 session bihash",
104 am->fa_conn_table_hash_num_buckets,
105 am->fa_conn_table_hash_memory_size);
106 clib_bihash_set_kvp_format_fn_16_8 (&am->fa_ip4_sessions_hash,
107 format_ip4_session_bihash_kv);
109 am->fa_sessions_hash_is_initialized = 1;
115 * Get the timeout of the session in a list since its enqueue time.
119 fa_session_get_list_timeout (acl_main_t * am, fa_session_t * sess)
121 u64 timeout = am->vlib_main->clib_time.clocks_per_second / 1000;
122 timeout = fa_session_get_timeout (am, sess);
123 /* for all user lists, check them twice per timeout */
124 timeout >>= (sess->link_list_id != ACL_TIMEOUT_PURGATORY);
129 acl_fa_get_list_head_expiry_time (acl_main_t * am,
130 acl_fa_per_worker_data_t * pw, u64 now,
131 u16 thread_index, int timeout_type)
133 return pw->fa_conn_list_head_expiry_time[timeout_type];
137 acl_fa_conn_time_to_check (acl_main_t * am, acl_fa_per_worker_data_t * pw,
138 u64 now, u16 thread_index, u32 session_index)
140 if (session_index == FA_SESSION_BOGUS_INDEX)
142 fa_session_t *sess = get_session_ptr (am, thread_index, session_index);
144 sess->link_enqueue_time + fa_session_get_list_timeout (am, sess);
145 return (timeout_time < now)
146 || (sess->link_enqueue_time <= pw->swipe_end_time);
150 * see if there are sessions ready to be checked,
151 * do the maintenance (requeue or delete), and
152 * return the total number of sessions reclaimed.
155 acl_fa_check_idle_sessions (acl_main_t * am, u16 thread_index, u64 now)
157 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
158 fa_full_session_id_t fsid;
159 fsid.thread_index = thread_index;
160 int total_expired = 0;
162 /* let the other threads enqueue more requests while we process, if they like */
163 aclp_swap_wip_and_pending_session_change_requests (am, thread_index);
166 vec_foreach (psr, pw->wip_session_change_requests)
168 acl_fa_sess_req_t op = *psr >> 32;
169 fsid.session_index = *psr & 0xffffffff;
172 case ACL_FA_REQ_SESS_RESCHEDULE:
173 acl_fa_restart_timer_for_session (am, now, fsid);
180 if (pw->wip_session_change_requests)
181 _vec_len (pw->wip_session_change_requests) = 0;
186 int n_pending_swipes = 0;
187 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
190 while (n_expired < am->fa_max_deleted_sessions_per_interval)
192 fsid.session_index = pw->fa_conn_list_head[tt];
193 if (!acl_fa_conn_time_to_check
194 (am, pw, now, thread_index, pw->fa_conn_list_head[tt]))
198 if (am->trace_sessions > 3)
200 elog_acl_maybe_trace_X3 (am,
201 "acl_fa_check_idle_sessions: expire session %d in list %d on thread %d",
202 "i4i4i4", (u32) fsid.session_index,
203 (u32) tt, (u32) thread_index);
205 vec_add1 (pw->expired, fsid.session_index);
207 acl_fa_conn_list_delete_session (am, fsid, now);
210 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
212 u32 session_index = pw->fa_conn_list_head[tt];
213 if (session_index == FA_SESSION_BOGUS_INDEX)
216 get_session_ptr (am, thread_index, session_index);
217 n_pending_swipes += sess->link_enqueue_time <= pw->swipe_end_time;
219 if (n_pending_swipes == 0)
221 pw->swipe_end_time = 0;
226 vec_foreach (psid, pw->expired)
228 fsid.session_index = *psid;
229 if (!pool_is_free_index (pw->fa_sessions_pool, fsid.session_index))
232 get_session_ptr (am, thread_index, fsid.session_index);
233 u32 sw_if_index = sess->sw_if_index;
234 u64 sess_timeout_time =
235 sess->last_active_time + fa_session_get_timeout (am, sess);
236 int timeout_passed = (now >= sess_timeout_time);
237 int clearing_interface =
238 clib_bitmap_get (pw->pending_clear_sw_if_index_bitmap, sw_if_index);
239 if (am->trace_sessions > 3)
241 elog_acl_maybe_trace_X2 (am,
242 "acl_fa_check_idle_sessions: now %lu sess_timeout_time %lu",
243 "i8i8", now, sess_timeout_time);
244 elog_acl_maybe_trace_X4 (am,
245 "acl_fa_check_idle_sessions: session %d sw_if_index %d timeout_passed %d clearing_interface %d",
246 "i4i4i4i4", (u32) fsid.session_index,
247 (u32) sess->sw_if_index,
248 (u32) timeout_passed,
249 (u32) clearing_interface);
251 if (timeout_passed || clearing_interface)
253 if (acl_fa_two_stage_delete_session (am, sw_if_index, fsid, now))
255 if (am->trace_sessions > 3)
257 elog_acl_maybe_trace_X2 (am,
258 "acl_fa_check_idle_sessions: deleted session %d sw_if_index %d",
259 "i4i4", (u32) fsid.session_index,
260 (u32) sess->sw_if_index);
262 /* the session has been put */
263 pw->cnt_deleted_sessions++;
267 /* the connection marked as deleted and put to purgatory */
268 if (am->trace_sessions > 3)
270 elog_acl_maybe_trace_X2 (am,
271 "acl_fa_check_idle_sessions: session %d sw_if_index %d marked as deleted, put to purgatory",
272 "i4i4", (u32) fsid.session_index,
273 (u32) sess->sw_if_index);
280 if (am->trace_sessions > 3)
282 elog_acl_maybe_trace_X2 (am,
283 "acl_fa_check_idle_sessions: restart timer for session %d sw_if_index %d",
284 "i4i4", (u32) fsid.session_index,
285 (u32) sess->sw_if_index);
287 /* There was activity on the session, so the idle timeout
288 has not passed. Enqueue for another time period. */
290 acl_fa_conn_list_add_session (am, fsid, now);
291 pw->cnt_session_timer_restarted++;
296 pw->cnt_already_deleted_sessions++;
299 total_expired = vec_len (pw->expired);
300 /* zero out the vector which we have acted on */
302 _vec_len (pw->expired) = 0;
303 /* if we were advancing and reached the end
304 * (no more sessions to recycle), reset the fast-forward timestamp */
306 if (pw->swipe_end_time && 0 == total_expired)
307 pw->swipe_end_time = 0;
309 elog_acl_maybe_trace_X1 (am,
310 "acl_fa_check_idle_sessions: done, total sessions expired: %d",
311 "i4", (u32) total_expired);
312 return (total_expired);
316 * This process ensures the connection cleanup happens every so often
317 * even in absence of traffic, as well as provides general orchestration
318 * for requests like connection deletion on a given sw_if_index.
323 #define foreach_acl_fa_cleaner_error \
324 _(UNKNOWN_EVENT, "unknown event received") \
329 #define _(sym,str) ACL_FA_CLEANER_ERROR_##sym,
330 foreach_acl_fa_cleaner_error
332 ACL_FA_CLEANER_N_ERROR,
333 } acl_fa_cleaner_error_t;
335 static char *acl_fa_cleaner_error_strings[] = {
336 #define _(sym,string) string,
337 foreach_acl_fa_cleaner_error
343 static vlib_node_registration_t acl_fa_session_cleaner_process_node;
344 static vlib_node_registration_t acl_fa_worker_session_cleaner_process_node;
347 send_one_worker_interrupt (vlib_main_t * vm, acl_main_t * am,
350 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
351 if (!pw->interrupt_is_pending)
353 pw->interrupt_is_pending = 1;
354 vlib_node_set_interrupt_pending (vlib_mains[thread_index],
355 acl_fa_worker_session_cleaner_process_node.index);
356 elog_acl_maybe_trace_X1 (am,
357 "send_one_worker_interrupt: send interrupt to worker %u",
358 "i4", ((u32) thread_index));
359 /* if the interrupt was requested, mark that done. */
360 /* pw->interrupt_is_needed = 0; */
361 CLIB_MEMORY_BARRIER ();
366 aclp_post_session_change_request (acl_main_t * am, u32 target_thread,
367 u32 target_session, u32 request_type)
369 acl_fa_per_worker_data_t *pw_me =
370 &am->per_worker_data[os_get_thread_index ()];
371 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
372 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
373 /* vec_add1 might cause a reallocation, change the heap just in case */
374 void *oldheap = clib_mem_set_heap (am->acl_mheap);
375 vec_add1 (pw->pending_session_change_requests,
376 (((u64) request_type) << 32) | target_session);
377 clib_mem_set_heap (oldheap);
379 pw->rcvd_session_change_requests++;
380 pw_me->sent_session_change_requests++;
381 if (vec_len (pw->pending_session_change_requests) == 1)
383 /* ensure the requests get processed */
384 send_one_worker_interrupt (am->vlib_main, am, target_thread);
386 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
390 aclp_swap_wip_and_pending_session_change_requests (acl_main_t * am,
393 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
395 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
396 tmp = pw->pending_session_change_requests;
397 pw->pending_session_change_requests = pw->wip_session_change_requests;
398 pw->wip_session_change_requests = tmp;
399 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
404 purgatory_has_connections (vlib_main_t * vm, acl_main_t * am,
407 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
409 return (FA_SESSION_BOGUS_INDEX !=
410 pw->fa_conn_list_head[ACL_TIMEOUT_PURGATORY]);
416 * Per-worker thread interrupt-driven cleaner thread
417 * to clean idle connections if there are no packets
420 acl_fa_worker_conn_cleaner_process (vlib_main_t * vm,
421 vlib_node_runtime_t * rt,
424 acl_main_t *am = &acl_main;
425 u64 now = clib_cpu_time_now ();
426 u16 thread_index = os_get_thread_index ();
427 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
429 elog_acl_maybe_trace_X1 (am,
430 "acl_fa_worker_conn_cleaner interrupt: now %lu",
432 /* allow another interrupt to be queued */
433 pw->interrupt_is_pending = 0;
434 if (pw->clear_in_process)
436 if (0 == pw->swipe_end_time)
439 * Someone has just set the flag to start clearing.
440 * we do this by combing through the connections up to a "time T"
441 * which is now, and requeueing everything except the expired
442 * connections and those matching the interface(s) being cleared.
446 * first filter the sw_if_index bitmap that they want from us, by
447 * a bitmap of sw_if_index for which we actually have connections.
449 if ((pw->pending_clear_sw_if_index_bitmap == 0)
450 || (pw->serviced_sw_if_index_bitmap == 0))
452 elog_acl_maybe_trace_X1 (am,
453 "acl_fa_worker_conn_cleaner: now %lu, someone tried to call clear but one of the bitmaps are empty",
455 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
459 #ifdef FA_NODE_VERBOSE_DEBUG
461 ("WORKER-CLEAR: (before and) swiping sw-if-index bitmap: %U, my serviced bitmap %U",
462 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
463 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
465 pw->pending_clear_sw_if_index_bitmap =
466 clib_bitmap_and (pw->pending_clear_sw_if_index_bitmap,
467 pw->serviced_sw_if_index_bitmap);
470 if (clib_bitmap_is_zero (pw->pending_clear_sw_if_index_bitmap))
472 /* if the cross-section is a zero vector, no need to do anything. */
473 elog_acl_maybe_trace_X1 (am,
474 "acl_fa_worker_conn_cleaner: now %lu, clearing done, nothing to do",
476 pw->clear_in_process = 0;
477 pw->swipe_end_time = 0;
481 #ifdef FA_NODE_VERBOSE_DEBUG
483 ("WORKER-CLEAR: swiping sw-if-index bitmap: %U, my serviced bitmap %U",
484 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
485 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
487 elog_acl_maybe_trace_X1 (am,
488 "acl_fa_worker_conn_cleaner: swiping until %lu",
490 /* swipe through the connection lists until enqueue timestamps become above "now" */
491 pw->swipe_end_time = now;
495 num_expired = acl_fa_check_idle_sessions (am, thread_index, now);
496 // clib_warning("WORKER-CLEAR: checked %d sessions (clear_in_progress: %d)", num_expired, pw->clear_in_process);
497 elog_acl_maybe_trace_X2 (am,
498 "acl_fa_worker_conn_cleaner: checked %d sessions (clear_in_process: %d)",
499 "i4i4", (u32) num_expired,
500 (u32) pw->clear_in_process);
501 if (pw->clear_in_process)
503 if (pw->swipe_end_time == 0)
505 /* we were clearing but we could not process any more connections. time to stop. */
506 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
507 pw->clear_in_process = 0;
508 elog_acl_maybe_trace_X1 (am,
509 "acl_fa_worker_conn_cleaner: now %lu, clearing done - all done",
514 elog_acl_maybe_trace_X1 (am,
515 "acl_fa_worker_conn_cleaner: now %lu, more work to do - requesting interrupt",
517 /* should continue clearing.. So could they please sent an interrupt again? */
518 send_one_worker_interrupt (vm, am, thread_index);
519 // pw->interrupt_is_needed = 1;
526 /* there was too much work, we should get an interrupt ASAP */
527 // pw->interrupt_is_needed = 1;
528 send_one_worker_interrupt (vm, am, thread_index);
529 pw->interrupt_is_unwanted = 0;
533 /* the current rate of interrupts is ok */
534 pw->interrupt_is_needed = 0;
535 pw->interrupt_is_unwanted = 0;
537 elog_acl_maybe_trace_X3 (am,
538 "acl_fa_worker_conn_cleaner: now %lu, interrupt needed: %u, interrupt unwanted: %u",
539 "i8i4i4", now, ((u32) pw->interrupt_is_needed),
540 ((u32) pw->interrupt_is_unwanted));
542 /* be persistent about quickly deleting the connections from the purgatory */
543 if (purgatory_has_connections (vm, am, thread_index))
545 send_one_worker_interrupt (vm, am, thread_index);
547 pw->interrupt_generation = am->fa_interrupt_generation;
552 send_interrupts_to_workers (vlib_main_t * vm, acl_main_t * am)
555 /* Can't use vec_len(am->per_worker_data) since the threads might not have come up yet; */
556 int n_threads = vec_len (vlib_mains);
557 for (i = 0; i < n_threads; i++)
559 send_one_worker_interrupt (vm, am, i);
563 /* centralized process to drive per-worker cleaners */
565 acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
568 acl_main_t *am = &acl_main;
570 f64 cpu_cps = vm->clib_time.clocks_per_second;
572 /* We should check if there are connections to clean up - at least twice a second */
573 u64 max_timer_wait_interval = cpu_cps / 2;
574 uword event_type, *event_data = 0;
575 acl_fa_per_worker_data_t *pw0;
577 am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
578 am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
579 am->fa_interrupt_generation = 1;
582 now = clib_cpu_time_now ();
583 next_expire = now + am->fa_current_cleaner_timer_wait_interval;
584 int has_pending_conns = 0;
589 * walk over all per-thread list heads of different timeouts,
590 * and see if there are any connections pending.
591 * If there aren't - we do not need to wake up until the
592 * worker code signals that it has added a connection.
594 * Also, while we are at it, calculate the earliest we need to wake up.
596 for (ti = 0; ti < vec_len (vlib_mains); ti++)
598 if (ti >= vec_len (am->per_worker_data))
602 acl_fa_per_worker_data_t *pw = &am->per_worker_data[ti];
603 for (tt = 0; tt < vec_len (pw->fa_conn_list_head); tt++)
606 acl_fa_get_list_head_expiry_time (am, pw, now, ti, tt);
607 if ((head_expiry < next_expire) && !pw->interrupt_is_pending)
609 elog_acl_maybe_trace_X3 (am,
610 "acl_fa_session_cleaner_process: now %lu, worker: %u tt: %u",
611 "i8i2i2", now, ti, tt);
612 elog_acl_maybe_trace_X2 (am,
613 "acl_fa_session_cleaner_process: head expiry: %lu, is earlier than curr next expire: %lu",
614 "i8i8", head_expiry, next_expire);
615 next_expire = head_expiry;
617 if (FA_SESSION_BOGUS_INDEX != pw->fa_conn_list_head[tt])
619 has_pending_conns = 1;
624 /* If no pending connections and no ACL applied then no point in timing out */
625 if (!has_pending_conns && (0 == am->fa_total_enabled_count))
627 am->fa_cleaner_cnt_wait_without_timeout++;
628 elog_acl_maybe_trace_X1 (am,
629 "acl_conn_cleaner: now %lu entering wait without timeout",
631 (void) vlib_process_wait_for_event (vm);
632 event_type = vlib_process_get_events (vm, &event_data);
636 f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps;
639 /* skip waiting altogether */
644 am->fa_cleaner_cnt_wait_with_timeout++;
645 elog_acl_maybe_trace_X2 (am,
646 "acl_conn_cleaner: now %lu entering wait with timeout %.6f sec",
647 "i8f8", now, timeout);
648 (void) vlib_process_wait_for_event_or_clock (vm, timeout);
649 event_type = vlib_process_get_events (vm, &event_data);
658 case ACL_FA_CLEANER_RESCHEDULE:
661 case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
663 uword *clear_sw_if_index_bitmap = 0;
666 now = clib_cpu_time_now ();
667 elog_acl_maybe_trace_X1 (am,
668 "acl_fa_session_cleaner_process: now %lu, received ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX",
670 vec_foreach (sw_if_index0, event_data)
672 am->fa_cleaner_cnt_delete_by_sw_index++;
673 elog_acl_maybe_trace_X1 (am,
674 "acl_fa_session_cleaner_process: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX %u",
675 "i4", *sw_if_index0);
676 if (*sw_if_index0 == ~0)
682 if (!pool_is_free_index
683 (am->vnet_main->interface_main.sw_interfaces,
686 clear_sw_if_index_bitmap =
687 clib_bitmap_set (clear_sw_if_index_bitmap,
693 ("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U, clear_all: %u",
694 format_bitmap_hex, clear_sw_if_index_bitmap, clear_all);
695 vec_foreach (pw0, am->per_worker_data)
697 CLIB_MEMORY_BARRIER ();
698 while (pw0->clear_in_process)
700 CLIB_MEMORY_BARRIER ();
701 elog_acl_maybe_trace_X1 (am,
702 "ACL_FA_NODE_CLEAN: waiting previous cleaning cycle to finish on %u",
704 (u32) (pw0 - am->per_worker_data));
705 vlib_process_suspend (vm, 0.0001);
706 if (pw0->interrupt_is_needed)
708 send_one_worker_interrupt (vm, am,
709 (pw0 - am->per_worker_data));
712 if (pw0->clear_in_process)
715 ("ERROR-BUG! Could not initiate cleaning on worker because another cleanup in progress");
721 /* if we need to clear all, then just clear the interfaces that we are servicing */
722 pw0->pending_clear_sw_if_index_bitmap =
723 clib_bitmap_dup (pw0->serviced_sw_if_index_bitmap);
727 pw0->pending_clear_sw_if_index_bitmap =
728 clib_bitmap_dup (clear_sw_if_index_bitmap);
731 ("ACL_FA_CLEANER: thread %u, pending clear bitmap: %U",
732 (am->per_worker_data - pw0), format_bitmap_hex,
733 pw0->pending_clear_sw_if_index_bitmap);
734 pw0->clear_in_process = 1;
737 /* send some interrupts so they can start working */
738 send_interrupts_to_workers (vm, am);
740 /* now wait till they all complete */
741 acl_log_info ("CLEANER mains len: %u per-worker len: %d",
742 vec_len (vlib_mains),
743 vec_len (am->per_worker_data));
744 vec_foreach (pw0, am->per_worker_data)
746 CLIB_MEMORY_BARRIER ();
747 while (pw0->clear_in_process)
749 CLIB_MEMORY_BARRIER ();
750 elog_acl_maybe_trace_X1 (am,
751 "ACL_FA_NODE_CLEAN: waiting for my cleaning cycle to finish on %u",
753 (u32) (pw0 - am->per_worker_data));
754 vlib_process_suspend (vm, 0.0001);
755 if (pw0->interrupt_is_needed)
757 send_one_worker_interrupt (vm, am,
758 (pw0 - am->per_worker_data));
762 acl_log_info ("ACL_FA_NODE_CLEAN: cleaning done");
763 clib_bitmap_free (clear_sw_if_index_bitmap);
765 am->fa_cleaner_cnt_delete_by_sw_index_ok++;
768 #ifdef FA_NODE_VERBOSE_DEBUG
769 clib_warning ("ACL plugin connection cleaner: unknown event %u",
772 vlib_node_increment_counter (vm,
773 acl_fa_session_cleaner_process_node.
775 ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1);
776 am->fa_cleaner_cnt_unknown_event++;
780 send_interrupts_to_workers (vm, am);
783 _vec_len (event_data) = 0;
786 * If the interrupts were not processed yet, ensure we wait a bit,
789 int need_more_wait = 0;
790 int max_wait_cycles = 100;
794 vec_foreach (pw0, am->per_worker_data)
796 if (pw0->interrupt_generation != am->fa_interrupt_generation)
803 vlib_process_suspend (vm, 0.0001);
806 while (need_more_wait && (--max_wait_cycles > 0));
808 int interrupts_needed = 0;
809 int interrupts_unwanted = 0;
811 vec_foreach (pw0, am->per_worker_data)
813 if (pw0->interrupt_is_needed)
816 /* the per-worker value is reset when sending the interrupt */
818 if (pw0->interrupt_is_unwanted)
820 interrupts_unwanted++;
821 pw0->interrupt_is_unwanted = 0;
824 if (interrupts_needed)
826 /* they need more interrupts, do less waiting around next time */
827 am->fa_current_cleaner_timer_wait_interval /= 2;
828 /* never go into zero-wait either though - we need to give the space to others */
829 am->fa_current_cleaner_timer_wait_interval += 1;
831 else if (interrupts_unwanted)
833 /* slowly increase the amount of sleep up to a limit */
834 if (am->fa_current_cleaner_timer_wait_interval <
835 max_timer_wait_interval)
836 am->fa_current_cleaner_timer_wait_interval +=
837 cpu_cps * am->fa_cleaner_wait_time_increment;
839 am->fa_cleaner_cnt_event_cycles++;
840 am->fa_interrupt_generation++;
848 acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
850 acl_main_t *am = &acl_main;
853 acl_fa_verify_init_sessions (am);
854 am->fa_total_enabled_count++;
855 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
856 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
857 ACL_FA_CLEANER_RESCHEDULE, 0);
858 clib_mem_set_heap (oldheap);
862 am->fa_total_enabled_count--;
867 ASSERT (clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index) !=
869 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
870 vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa",
871 sw_if_index, enable_disable, 0, 0);
872 vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa",
873 sw_if_index, enable_disable, 0, 0);
874 clib_mem_set_heap (oldheap);
875 am->fa_in_acl_on_sw_if_index =
876 clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index,
881 ASSERT (clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index) !=
883 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
884 vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa",
885 sw_if_index, enable_disable, 0, 0);
886 vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa",
887 sw_if_index, enable_disable, 0, 0);
888 clib_mem_set_heap (oldheap);
889 am->fa_out_acl_on_sw_if_index =
890 clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index,
893 if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index))
894 && (!acl_fa_ifc_has_out_acl (am, sw_if_index)))
896 #ifdef FA_NODE_VERBOSE_DEBUG
897 clib_warning ("ENABLE-DISABLE: clean the connections on interface %d",
900 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
901 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
902 ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
904 clib_mem_set_heap (oldheap);
909 show_fa_sessions_hash (vlib_main_t * vm, u32 verbose)
911 acl_main_t *am = &acl_main;
912 if (am->fa_sessions_hash_is_initialized)
914 vlib_cli_output (vm, "\nIPv6 Session lookup hash table:\n%U\n\n",
915 format_bihash_40_8, &am->fa_ip6_sessions_hash,
918 vlib_cli_output (vm, "\nIPv4 Session lookup hash table:\n%U\n\n",
919 format_bihash_16_8, &am->fa_ip4_sessions_hash,
925 "\nSession lookup hash table is not allocated.\n\n");
932 VLIB_REGISTER_NODE (acl_fa_worker_session_cleaner_process_node, static) = {
933 .function = acl_fa_worker_conn_cleaner_process,
934 .name = "acl-plugin-fa-worker-cleaner-process",
935 .type = VLIB_NODE_TYPE_INPUT,
936 .state = VLIB_NODE_STATE_INTERRUPT,
939 VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = {
940 .function = acl_fa_session_cleaner_process,
941 .type = VLIB_NODE_TYPE_PROCESS,
942 .name = "acl-plugin-fa-cleaner-process",
943 .n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings),
944 .error_strings = acl_fa_cleaner_error_strings,
953 * fd.io coding-style-patch-verification: ON
956 * eval: (c-set-style "gnu")