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 <vppinfra/error.h>
24 #include <vnet/ip/icmp46_packet.h>
26 #include <plugins/acl/fa_node.h>
27 #include <plugins/acl/acl.h>
28 #include <plugins/acl/lookup_context.h>
29 #include <plugins/acl/public_inlines.h>
30 #include <plugins/acl/session_inlines.h>
34 static_always_inline u8 *
35 format_ip46_session_bihash_kv (u8 * s, va_list * args, int is_ip6)
40 void *format_addr_func;
44 clib_bihash_kv_40_8_t *kv_40_8 =
45 va_arg (*args, clib_bihash_kv_40_8_t *);
46 a5t.kv_40_8 = *kv_40_8;
47 paddr0 = &a5t.ip6_addr[0];
48 paddr1 = &a5t.ip6_addr[1];
49 format_addr_func = format_ip6_address;
53 clib_bihash_kv_16_8_t *kv_16_8 =
54 va_arg (*args, clib_bihash_kv_16_8_t *);
55 a5t.kv_16_8 = *kv_16_8;
56 paddr0 = &a5t.ip4_addr[0];
57 paddr1 = &a5t.ip4_addr[1];
58 format_addr_func = format_ip4_address;
61 fa_full_session_id_t *sess = (fa_full_session_id_t *) & a5t.pkt;
63 return (format (s, "l3 %U -> %U %U | sess id %d thread id %d epoch %04x",
64 format_addr_func, paddr0,
65 format_addr_func, paddr1,
66 format_fa_session_l4_key, &a5t.l4,
67 sess->session_index, sess->thread_index,
68 sess->intf_policy_epoch));
72 format_ip6_session_bihash_kv (u8 * s, va_list * args)
74 return format_ip46_session_bihash_kv (s, args, 1);
78 format_ip4_session_bihash_kv (u8 * s, va_list * args)
80 return format_ip46_session_bihash_kv (s, args, 0);
85 acl_fa_verify_init_sessions (acl_main_t * am)
87 if (!am->fa_sessions_hash_is_initialized)
90 /* Allocate the per-worker sessions pools */
91 for (wk = 0; wk < vec_len (am->per_worker_data); wk++)
93 acl_fa_per_worker_data_t *pw = &am->per_worker_data[wk];
96 * // In lieu of trying to preallocate the pool and its free bitmap, rather use pool_init_fixed
97 * pool_alloc_aligned(pw->fa_sessions_pool, am->fa_conn_table_max_entries, CLIB_CACHE_LINE_BYTES);
98 * clib_bitmap_validate(pool_header(pw->fa_sessions_pool)->free_bitmap, am->fa_conn_table_max_entries);
100 pool_init_fixed (pw->fa_sessions_pool,
101 am->fa_conn_table_max_entries);
104 /* ... and the interface session hash table */
105 clib_bihash_init_40_8 (&am->fa_ip6_sessions_hash,
106 "ACL plugin FA IPv6 session bihash",
107 am->fa_conn_table_hash_num_buckets,
108 am->fa_conn_table_hash_memory_size);
109 clib_bihash_set_kvp_format_fn_40_8 (&am->fa_ip6_sessions_hash,
110 format_ip6_session_bihash_kv);
112 clib_bihash_init_16_8 (&am->fa_ip4_sessions_hash,
113 "ACL plugin FA IPv4 session bihash",
114 am->fa_conn_table_hash_num_buckets,
115 am->fa_conn_table_hash_memory_size);
116 clib_bihash_set_kvp_format_fn_16_8 (&am->fa_ip4_sessions_hash,
117 format_ip4_session_bihash_kv);
119 am->fa_sessions_hash_is_initialized = 1;
125 * Get the timeout of the session in a list since its enqueue time.
129 fa_session_get_list_timeout (acl_main_t * am, fa_session_t * sess)
131 u64 timeout = am->vlib_main->clib_time.clocks_per_second / 1000;
132 timeout = fa_session_get_timeout (am, sess);
133 /* for all user lists, check them twice per timeout */
134 timeout >>= (sess->link_list_id != ACL_TIMEOUT_PURGATORY);
139 acl_fa_get_list_head_expiry_time (acl_main_t * am,
140 acl_fa_per_worker_data_t * pw, u64 now,
141 u16 thread_index, int timeout_type)
143 return pw->fa_conn_list_head_expiry_time[timeout_type];
147 acl_fa_conn_time_to_check (acl_main_t * am, acl_fa_per_worker_data_t * pw,
148 u64 now, u16 thread_index, u32 session_index)
150 if (session_index == FA_SESSION_BOGUS_INDEX)
152 fa_session_t *sess = get_session_ptr (am, thread_index, session_index);
154 sess->link_enqueue_time + fa_session_get_list_timeout (am, sess);
155 return (timeout_time < now)
156 || (sess->link_enqueue_time <= pw->swipe_end_time);
160 * see if there are sessions ready to be checked,
161 * do the maintenance (requeue or delete), and
162 * return the total number of sessions reclaimed.
165 acl_fa_check_idle_sessions (acl_main_t * am, u16 thread_index, u64 now)
167 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
168 fa_full_session_id_t fsid;
169 fsid.thread_index = thread_index;
170 int total_expired = 0;
172 /* let the other threads enqueue more requests while we process, if they like */
173 aclp_swap_wip_and_pending_session_change_requests (am, thread_index);
176 vec_foreach (psr, pw->wip_session_change_requests)
178 acl_fa_sess_req_t op = *psr >> 32;
179 fsid.session_index = *psr & 0xffffffff;
182 case ACL_FA_REQ_SESS_RESCHEDULE:
183 acl_fa_restart_timer_for_session (am, now, fsid);
190 if (pw->wip_session_change_requests)
191 _vec_len (pw->wip_session_change_requests) = 0;
196 int n_pending_swipes = 0;
197 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
200 while (n_expired < am->fa_max_deleted_sessions_per_interval)
202 fsid.session_index = pw->fa_conn_list_head[tt];
203 if (!acl_fa_conn_time_to_check
204 (am, pw, now, thread_index, pw->fa_conn_list_head[tt]))
208 if (am->trace_sessions > 3)
210 elog_acl_maybe_trace_X3 (am,
211 "acl_fa_check_idle_sessions: expire session %d in list %d on thread %d",
212 "i4i4i4", (u32) fsid.session_index,
213 (u32) tt, (u32) thread_index);
215 vec_add1 (pw->expired, fsid.session_index);
217 acl_fa_conn_list_delete_session (am, fsid, now);
220 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
222 u32 session_index = pw->fa_conn_list_head[tt];
223 if (session_index == FA_SESSION_BOGUS_INDEX)
226 get_session_ptr (am, thread_index, session_index);
227 n_pending_swipes += sess->link_enqueue_time <= pw->swipe_end_time;
229 if (n_pending_swipes == 0)
231 pw->swipe_end_time = 0;
236 vec_foreach (psid, pw->expired)
238 fsid.session_index = *psid;
239 if (!pool_is_free_index (pw->fa_sessions_pool, fsid.session_index))
242 get_session_ptr (am, thread_index, fsid.session_index);
243 u32 sw_if_index = sess->sw_if_index;
244 u64 sess_timeout_time =
245 sess->last_active_time + fa_session_get_timeout (am, sess);
246 int timeout_passed = (now >= sess_timeout_time);
247 int clearing_interface =
248 clib_bitmap_get (pw->pending_clear_sw_if_index_bitmap, sw_if_index);
249 if (am->trace_sessions > 3)
251 elog_acl_maybe_trace_X2 (am,
252 "acl_fa_check_idle_sessions: now %lu sess_timeout_time %lu",
253 "i8i8", now, sess_timeout_time);
254 elog_acl_maybe_trace_X4 (am,
255 "acl_fa_check_idle_sessions: session %d sw_if_index %d timeout_passed %d clearing_interface %d",
256 "i4i4i4i4", (u32) fsid.session_index,
257 (u32) sess->sw_if_index,
258 (u32) timeout_passed,
259 (u32) clearing_interface);
261 if (timeout_passed || clearing_interface)
263 if (acl_fa_two_stage_delete_session (am, sw_if_index, fsid, now))
265 if (am->trace_sessions > 3)
267 elog_acl_maybe_trace_X2 (am,
268 "acl_fa_check_idle_sessions: deleted session %d sw_if_index %d",
269 "i4i4", (u32) fsid.session_index,
270 (u32) sess->sw_if_index);
272 /* the session has been put */
273 pw->cnt_deleted_sessions++;
277 /* the connection marked as deleted and put to purgatory */
278 if (am->trace_sessions > 3)
280 elog_acl_maybe_trace_X2 (am,
281 "acl_fa_check_idle_sessions: session %d sw_if_index %d marked as deleted, put to purgatory",
282 "i4i4", (u32) fsid.session_index,
283 (u32) sess->sw_if_index);
290 if (am->trace_sessions > 3)
292 elog_acl_maybe_trace_X2 (am,
293 "acl_fa_check_idle_sessions: restart timer for session %d sw_if_index %d",
294 "i4i4", (u32) fsid.session_index,
295 (u32) sess->sw_if_index);
297 /* There was activity on the session, so the idle timeout
298 has not passed. Enqueue for another time period. */
300 acl_fa_conn_list_add_session (am, fsid, now);
301 pw->cnt_session_timer_restarted++;
306 pw->cnt_already_deleted_sessions++;
309 total_expired = vec_len (pw->expired);
310 /* zero out the vector which we have acted on */
312 _vec_len (pw->expired) = 0;
313 /* if we were advancing and reached the end
314 * (no more sessions to recycle), reset the fast-forward timestamp */
316 if (pw->swipe_end_time && 0 == total_expired)
317 pw->swipe_end_time = 0;
319 elog_acl_maybe_trace_X1 (am,
320 "acl_fa_check_idle_sessions: done, total sessions expired: %d",
321 "i4", (u32) total_expired);
322 return (total_expired);
326 * This process ensures the connection cleanup happens every so often
327 * even in absence of traffic, as well as provides general orchestration
328 * for requests like connection deletion on a given sw_if_index.
333 #define foreach_acl_fa_cleaner_error \
334 _(UNKNOWN_EVENT, "unknown event received") \
339 #define _(sym,str) ACL_FA_CLEANER_ERROR_##sym,
340 foreach_acl_fa_cleaner_error
342 ACL_FA_CLEANER_N_ERROR,
343 } acl_fa_cleaner_error_t;
345 static char *acl_fa_cleaner_error_strings[] = {
346 #define _(sym,string) string,
347 foreach_acl_fa_cleaner_error
353 static vlib_node_registration_t acl_fa_session_cleaner_process_node;
354 static vlib_node_registration_t acl_fa_worker_session_cleaner_process_node;
357 send_one_worker_interrupt (vlib_main_t * vm, acl_main_t * am,
360 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
361 if (!pw->interrupt_is_pending)
363 pw->interrupt_is_pending = 1;
364 vlib_node_set_interrupt_pending (vlib_mains[thread_index],
365 acl_fa_worker_session_cleaner_process_node.index);
366 elog_acl_maybe_trace_X1 (am,
367 "send_one_worker_interrupt: send interrupt to worker %u",
368 "i4", ((u32) thread_index));
369 /* if the interrupt was requested, mark that done. */
370 /* pw->interrupt_is_needed = 0; */
371 CLIB_MEMORY_BARRIER ();
376 aclp_post_session_change_request (acl_main_t * am, u32 target_thread,
377 u32 target_session, u32 request_type)
379 acl_fa_per_worker_data_t *pw_me =
380 &am->per_worker_data[os_get_thread_index ()];
381 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
382 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
383 /* vec_add1 might cause a reallocation */
384 vec_add1 (pw->pending_session_change_requests,
385 (((u64) request_type) << 32) | target_session);
386 pw->rcvd_session_change_requests++;
387 pw_me->sent_session_change_requests++;
388 if (vec_len (pw->pending_session_change_requests) == 1)
390 /* ensure the requests get processed */
391 send_one_worker_interrupt (am->vlib_main, am, target_thread);
393 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
397 aclp_swap_wip_and_pending_session_change_requests (acl_main_t * am,
400 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
402 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
403 tmp = pw->pending_session_change_requests;
404 pw->pending_session_change_requests = pw->wip_session_change_requests;
405 pw->wip_session_change_requests = tmp;
406 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
411 purgatory_has_connections (vlib_main_t * vm, acl_main_t * am,
414 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
416 return (FA_SESSION_BOGUS_INDEX !=
417 pw->fa_conn_list_head[ACL_TIMEOUT_PURGATORY]);
423 * Per-worker thread interrupt-driven cleaner thread
424 * to clean idle connections if there are no packets
427 acl_fa_worker_conn_cleaner_process (vlib_main_t * vm,
428 vlib_node_runtime_t * rt,
431 acl_main_t *am = &acl_main;
432 u64 now = clib_cpu_time_now ();
433 u16 thread_index = os_get_thread_index ();
434 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
436 elog_acl_maybe_trace_X1 (am,
437 "acl_fa_worker_conn_cleaner interrupt: now %lu",
439 /* allow another interrupt to be queued */
440 pw->interrupt_is_pending = 0;
441 if (pw->clear_in_process)
443 if (0 == pw->swipe_end_time)
446 * Someone has just set the flag to start clearing.
447 * we do this by combing through the connections up to a "time T"
448 * which is now, and requeueing everything except the expired
449 * connections and those matching the interface(s) being cleared.
453 * first filter the sw_if_index bitmap that they want from us, by
454 * a bitmap of sw_if_index for which we actually have connections.
456 if ((pw->pending_clear_sw_if_index_bitmap == 0)
457 || (pw->serviced_sw_if_index_bitmap == 0))
459 elog_acl_maybe_trace_X1 (am,
460 "acl_fa_worker_conn_cleaner: now %lu, someone tried to call clear but one of the bitmaps are empty",
462 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
466 #ifdef FA_NODE_VERBOSE_DEBUG
468 ("WORKER-CLEAR: (before and) swiping sw-if-index bitmap: %U, my serviced bitmap %U",
469 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
470 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
472 pw->pending_clear_sw_if_index_bitmap =
473 clib_bitmap_and (pw->pending_clear_sw_if_index_bitmap,
474 pw->serviced_sw_if_index_bitmap);
477 if (clib_bitmap_is_zero (pw->pending_clear_sw_if_index_bitmap))
479 /* if the cross-section is a zero vector, no need to do anything. */
480 elog_acl_maybe_trace_X1 (am,
481 "acl_fa_worker_conn_cleaner: now %lu, clearing done, nothing to do",
483 pw->clear_in_process = 0;
484 pw->swipe_end_time = 0;
488 #ifdef FA_NODE_VERBOSE_DEBUG
490 ("WORKER-CLEAR: swiping sw-if-index bitmap: %U, my serviced bitmap %U",
491 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
492 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
494 elog_acl_maybe_trace_X1 (am,
495 "acl_fa_worker_conn_cleaner: swiping until %lu",
497 /* swipe through the connection lists until enqueue timestamps become above "now" */
498 pw->swipe_end_time = now;
502 num_expired = acl_fa_check_idle_sessions (am, thread_index, now);
503 // clib_warning("WORKER-CLEAR: checked %d sessions (clear_in_progress: %d)", num_expired, pw->clear_in_process);
504 elog_acl_maybe_trace_X2 (am,
505 "acl_fa_worker_conn_cleaner: checked %d sessions (clear_in_process: %d)",
506 "i4i4", (u32) num_expired,
507 (u32) pw->clear_in_process);
508 if (pw->clear_in_process)
510 if (pw->swipe_end_time == 0)
512 /* we were clearing but we could not process any more connections. time to stop. */
513 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
514 pw->clear_in_process = 0;
515 elog_acl_maybe_trace_X1 (am,
516 "acl_fa_worker_conn_cleaner: now %lu, clearing done - all done",
521 elog_acl_maybe_trace_X1 (am,
522 "acl_fa_worker_conn_cleaner: now %lu, more work to do - requesting interrupt",
524 /* should continue clearing.. So could they please sent an interrupt again? */
525 send_one_worker_interrupt (vm, am, thread_index);
526 // pw->interrupt_is_needed = 1;
533 /* there was too much work, we should get an interrupt ASAP */
534 // pw->interrupt_is_needed = 1;
535 send_one_worker_interrupt (vm, am, thread_index);
536 pw->interrupt_is_unwanted = 0;
540 /* the current rate of interrupts is ok */
541 pw->interrupt_is_needed = 0;
542 pw->interrupt_is_unwanted = 0;
544 elog_acl_maybe_trace_X3 (am,
545 "acl_fa_worker_conn_cleaner: now %lu, interrupt needed: %u, interrupt unwanted: %u",
546 "i8i4i4", now, ((u32) pw->interrupt_is_needed),
547 ((u32) pw->interrupt_is_unwanted));
549 /* be persistent about quickly deleting the connections from the purgatory */
550 if (purgatory_has_connections (vm, am, thread_index))
552 send_one_worker_interrupt (vm, am, thread_index);
554 pw->interrupt_generation = am->fa_interrupt_generation;
559 send_interrupts_to_workers (vlib_main_t * vm, acl_main_t * am)
562 /* Can't use vec_len(am->per_worker_data) since the threads might not have come up yet; */
563 int n_threads = vec_len (vlib_mains);
564 for (i = 0; i < n_threads; i++)
566 send_one_worker_interrupt (vm, am, i);
570 /* centralized process to drive per-worker cleaners */
572 acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
575 acl_main_t *am = &acl_main;
577 f64 cpu_cps = vm->clib_time.clocks_per_second;
579 /* We should check if there are connections to clean up - at least twice a second */
580 u64 max_timer_wait_interval = cpu_cps / 2;
581 uword event_type, *event_data = 0;
582 acl_fa_per_worker_data_t *pw0;
584 am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
585 am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
586 am->fa_interrupt_generation = 1;
589 now = clib_cpu_time_now ();
590 next_expire = now + am->fa_current_cleaner_timer_wait_interval;
591 int has_pending_conns = 0;
596 * walk over all per-thread list heads of different timeouts,
597 * and see if there are any connections pending.
598 * If there aren't - we do not need to wake up until the
599 * worker code signals that it has added a connection.
601 * Also, while we are at it, calculate the earliest we need to wake up.
603 for (ti = 0; ti < vec_len (vlib_mains); ti++)
605 if (ti >= vec_len (am->per_worker_data))
609 acl_fa_per_worker_data_t *pw = &am->per_worker_data[ti];
610 for (tt = 0; tt < vec_len (pw->fa_conn_list_head); tt++)
613 acl_fa_get_list_head_expiry_time (am, pw, now, ti, tt);
614 if ((head_expiry < next_expire) && !pw->interrupt_is_pending)
616 elog_acl_maybe_trace_X3 (am,
617 "acl_fa_session_cleaner_process: now %lu, worker: %u tt: %u",
618 "i8i2i2", now, ti, tt);
619 elog_acl_maybe_trace_X2 (am,
620 "acl_fa_session_cleaner_process: head expiry: %lu, is earlier than curr next expire: %lu",
621 "i8i8", head_expiry, next_expire);
622 next_expire = head_expiry;
624 if (FA_SESSION_BOGUS_INDEX != pw->fa_conn_list_head[tt])
626 has_pending_conns = 1;
631 /* If no pending connections and no ACL applied then no point in timing out */
632 if (!has_pending_conns && (0 == am->fa_total_enabled_count))
634 am->fa_cleaner_cnt_wait_without_timeout++;
635 elog_acl_maybe_trace_X1 (am,
636 "acl_conn_cleaner: now %lu entering wait without timeout",
638 (void) vlib_process_wait_for_event (vm);
639 event_type = vlib_process_get_events (vm, &event_data);
643 f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps;
646 /* skip waiting altogether */
651 am->fa_cleaner_cnt_wait_with_timeout++;
652 elog_acl_maybe_trace_X2 (am,
653 "acl_conn_cleaner: now %lu entering wait with timeout %.6f sec",
654 "i8f8", now, timeout);
655 (void) vlib_process_wait_for_event_or_clock (vm, timeout);
656 event_type = vlib_process_get_events (vm, &event_data);
665 case ACL_FA_CLEANER_RESCHEDULE:
668 case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
670 uword *clear_sw_if_index_bitmap = 0;
673 now = clib_cpu_time_now ();
674 elog_acl_maybe_trace_X1 (am,
675 "acl_fa_session_cleaner_process: now %lu, received ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX",
677 vec_foreach (sw_if_index0, event_data)
679 am->fa_cleaner_cnt_delete_by_sw_index++;
680 elog_acl_maybe_trace_X1 (am,
681 "acl_fa_session_cleaner_process: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX %u",
682 "i4", *sw_if_index0);
683 if (*sw_if_index0 == ~0)
689 if (!pool_is_free_index
690 (am->vnet_main->interface_main.sw_interfaces,
693 clear_sw_if_index_bitmap =
694 clib_bitmap_set (clear_sw_if_index_bitmap,
700 ("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U, clear_all: %u",
701 format_bitmap_hex, clear_sw_if_index_bitmap, clear_all);
702 vec_foreach (pw0, am->per_worker_data)
704 CLIB_MEMORY_BARRIER ();
705 while (pw0->clear_in_process)
707 CLIB_MEMORY_BARRIER ();
708 elog_acl_maybe_trace_X1 (am,
709 "ACL_FA_NODE_CLEAN: waiting previous cleaning cycle to finish on %u",
711 (u32) (pw0 - am->per_worker_data));
712 vlib_process_suspend (vm, 0.0001);
713 if (pw0->interrupt_is_needed)
715 send_one_worker_interrupt (vm, am,
716 (pw0 - am->per_worker_data));
719 if (pw0->clear_in_process)
722 ("ERROR-BUG! Could not initiate cleaning on worker because another cleanup in progress");
728 /* if we need to clear all, then just clear the interfaces that we are servicing */
729 pw0->pending_clear_sw_if_index_bitmap =
730 clib_bitmap_dup (pw0->serviced_sw_if_index_bitmap);
734 pw0->pending_clear_sw_if_index_bitmap =
735 clib_bitmap_dup (clear_sw_if_index_bitmap);
738 ("ACL_FA_CLEANER: thread %u, pending clear bitmap: %U",
739 (am->per_worker_data - pw0), format_bitmap_hex,
740 pw0->pending_clear_sw_if_index_bitmap);
741 pw0->clear_in_process = 1;
744 /* send some interrupts so they can start working */
745 send_interrupts_to_workers (vm, am);
747 /* now wait till they all complete */
748 acl_log_info ("CLEANER mains len: %u per-worker len: %d",
749 vec_len (vlib_mains),
750 vec_len (am->per_worker_data));
751 vec_foreach (pw0, am->per_worker_data)
753 CLIB_MEMORY_BARRIER ();
754 while (pw0->clear_in_process)
756 CLIB_MEMORY_BARRIER ();
757 elog_acl_maybe_trace_X1 (am,
758 "ACL_FA_NODE_CLEAN: waiting for my cleaning cycle to finish on %u",
760 (u32) (pw0 - am->per_worker_data));
761 vlib_process_suspend (vm, 0.0001);
762 if (pw0->interrupt_is_needed)
764 send_one_worker_interrupt (vm, am,
765 (pw0 - am->per_worker_data));
769 acl_log_info ("ACL_FA_NODE_CLEAN: cleaning done");
770 clib_bitmap_free (clear_sw_if_index_bitmap);
772 am->fa_cleaner_cnt_delete_by_sw_index_ok++;
775 #ifdef FA_NODE_VERBOSE_DEBUG
776 clib_warning ("ACL plugin connection cleaner: unknown event %u",
779 vlib_node_increment_counter (vm,
780 acl_fa_session_cleaner_process_node.
782 ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1);
783 am->fa_cleaner_cnt_unknown_event++;
787 send_interrupts_to_workers (vm, am);
790 _vec_len (event_data) = 0;
793 * If the interrupts were not processed yet, ensure we wait a bit,
796 int need_more_wait = 0;
797 int max_wait_cycles = 100;
801 vec_foreach (pw0, am->per_worker_data)
803 if (pw0->interrupt_generation != am->fa_interrupt_generation)
810 vlib_process_suspend (vm, 0.0001);
813 while (need_more_wait && (--max_wait_cycles > 0));
815 int interrupts_needed = 0;
816 int interrupts_unwanted = 0;
818 vec_foreach (pw0, am->per_worker_data)
820 if (pw0->interrupt_is_needed)
823 /* the per-worker value is reset when sending the interrupt */
825 if (pw0->interrupt_is_unwanted)
827 interrupts_unwanted++;
828 pw0->interrupt_is_unwanted = 0;
831 if (interrupts_needed)
833 /* they need more interrupts, do less waiting around next time */
834 am->fa_current_cleaner_timer_wait_interval /= 2;
835 /* never go into zero-wait either though - we need to give the space to others */
836 am->fa_current_cleaner_timer_wait_interval += 1;
838 else if (interrupts_unwanted)
840 /* slowly increase the amount of sleep up to a limit */
841 if (am->fa_current_cleaner_timer_wait_interval <
842 max_timer_wait_interval)
843 am->fa_current_cleaner_timer_wait_interval +=
844 cpu_cps * am->fa_cleaner_wait_time_increment;
846 am->fa_cleaner_cnt_event_cycles++;
847 am->fa_interrupt_generation++;
855 acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
857 acl_main_t *am = &acl_main;
860 acl_fa_verify_init_sessions (am);
861 am->fa_total_enabled_count++;
862 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
863 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
864 ACL_FA_CLEANER_RESCHEDULE, 0);
865 clib_mem_set_heap (oldheap);
869 am->fa_total_enabled_count--;
874 ASSERT (clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index) !=
876 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
877 vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa",
878 sw_if_index, enable_disable, 0, 0);
879 vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa",
880 sw_if_index, enable_disable, 0, 0);
881 clib_mem_set_heap (oldheap);
882 am->fa_in_acl_on_sw_if_index =
883 clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index,
888 ASSERT (clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index) !=
890 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
891 vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa",
892 sw_if_index, enable_disable, 0, 0);
893 vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa",
894 sw_if_index, enable_disable, 0, 0);
895 clib_mem_set_heap (oldheap);
896 am->fa_out_acl_on_sw_if_index =
897 clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index,
900 if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index))
901 && (!acl_fa_ifc_has_out_acl (am, sw_if_index)))
903 #ifdef FA_NODE_VERBOSE_DEBUG
904 clib_warning ("ENABLE-DISABLE: clean the connections on interface %d",
907 void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
908 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
909 ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
911 clib_mem_set_heap (oldheap);
916 show_fa_sessions_hash (vlib_main_t * vm, u32 verbose)
918 acl_main_t *am = &acl_main;
919 if (am->fa_sessions_hash_is_initialized)
921 vlib_cli_output (vm, "\nIPv6 Session lookup hash table:\n%U\n\n",
922 format_bihash_40_8, &am->fa_ip6_sessions_hash,
925 vlib_cli_output (vm, "\nIPv4 Session lookup hash table:\n%U\n\n",
926 format_bihash_16_8, &am->fa_ip4_sessions_hash,
932 "\nSession lookup hash table is not allocated.\n\n");
939 VLIB_REGISTER_NODE (acl_fa_worker_session_cleaner_process_node, static) = {
940 .function = acl_fa_worker_conn_cleaner_process,
941 .name = "acl-plugin-fa-worker-cleaner-process",
942 .type = VLIB_NODE_TYPE_INPUT,
943 .state = VLIB_NODE_STATE_INTERRUPT,
946 VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = {
947 .function = acl_fa_session_cleaner_process,
948 .type = VLIB_NODE_TYPE_PROCESS,
949 .name = "acl-plugin-fa-cleaner-process",
950 .n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings),
951 .error_strings = acl_fa_cleaner_error_strings,
960 * fd.io coding-style-patch-verification: ON
963 * eval: (c-set-style "gnu")